Rad Fan Not Kicking In..!!!!

ok, now the cars idling is cured i thought id start a fresh thread for a fresh problem!:D :scratch:

note: ive have done away with the swirlpot and fitted a campus matrix to waterpump bleed hose.
also both my stat and fan switch are std temp and my stat has a 3mm hole drilled into it to aid bleeding.

so the problem -

the rad fan does not want to kick in at all.! the temp rises past where the fan should kick in! i shut the engine off before the temp rises too high.!

ive tested the rad fan switch and its working with a multimeter.
the relay is also ok,
the fan works if i bridge the wires,
ive also bled the system.


just to add, the way i bled the system is as follows -

• fill rad up via the top rad hose until full, wait for the coolant to drop and keep on toping the rad up until its full.
• refit top rad hose to water pump.
• fill header tank and blow coolant through the system making sure to keep the header tank topped up, keep blowing the header tank until a constant stream of coolant flows out the highest bleed hose and lock the nipple off while still blowing in the header tank.
• start the car with the header tank cap off.
• fit the header tank cap.

does that sound ok or am i doing something wrong? also to add ive not used the top rad hose bleed nipple yet as i dont know at what point i should do so?? do i even need to as my stat has a hole in it???!!


what else can i look at or do differently?

where do you think the fan should cut in....?

I'd be taking out the bleed screws while the engines warming up, leave the expansion tank cap off untill really warm and raise the expansion tank as high as possible. Apart from that theres nothing different i would do!

Quote:

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Originally Posted by Sparkie

where do you think the fan should cut in....?

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well going by the std gauge which has the bottom 1st marking,then 2nd,3rd and the 4th last.
im assuming the rad fan should be kicking just before the 3rd mark.?

the temp go past this soi turn the engine off when it reaches inbetween the 3rd/4th marks

Quote:

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Originally Posted by Chris Hebden

I'd be taking out the bleed screws while the engines warming up, leave the expansion tank cap off untill really warm and raise the expansion tank as high as possible. Apart from that theres nothing different i would do!

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my header tank is at the highest point anyway = behind the scuttle.

also, am i right in thinking that no collant will flow out of the bleed nipples when the car is idling? im sure ive only ever had coolant come out when i give it abit of throttle.?

Quote:

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Originally Posted by raj

im assuming the rad fan should be kicking just before the 3rd mark.?

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:agree:

Quote:

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Originally Posted by Chris Hebden

I'd be taking out the bleed screws while the engines warming up, leave the expansion tank cap off untill really warm and raise the expansion tank as high as possible. Apart from that theres nothing different i would do!

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? Leave the screws shut, your just dragging air in! Raj, let it warm right up untill the last mark before the group of marks. Check that your stat is opening (feel the the rad and pipes, should be hot all over). Let it cool and then bleed again.

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Originally Posted by MATT C Ringworm Tuning

? Leave the screws shut, your just dragging air in!
Raj, let it warm right up untill the last mark before the group of marks. Check that your stat is opening (feel the the rad and pipes, should be hot all over). Let it cool and then bleed again.

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im pretty sure the stat is opening as all the hoses get hot.

ill re-bleed the system tommorrow when the cars cooled. shall i just use the same method i posted above.? or shall i just start the car with the header tank cap off?

im abit confused as i cant see how i could have an air lock as the header tank is the highest point so surely if there was air in the system it would be routing itself to this point, right.?

Quote:

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Originally Posted by raj

im pretty sure the stat is opening as all the hoses get hot.

ill re-bleed the system tommorrow when the cars cooled. shall i just use the same method i posted above.? or shall i just start the car with the header tank cap off?

im abit confused as i cant see how i could have an air lock as the header tank is the highest point so surely if there was air in the system it would be routing itself to this point, right.?

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Not necessarily air locks are still possible as it is trapped air quote ( TRAPPED) But hey give it some good head 2m and ya should be fine :laugh::laugh:

[quote=raj;37703]im pretty sure the stat is opening as all the hoses get hot.

ill re-bleed the system tommorrow when the cars cooled. shall i just use the same method i posted above.? or shall i just start the car with the header tank cap off?quote]

mate what you said seems fine, i tend to bleed the system differently.

with engine cold i hold the header tank as high as possible.
unscrew both bleed nipples
keep pouring water into header until you get a constant stream of water from nipples, as and when this happens fastern nipples up.
and all should be good!
start engine and check! :D

i remember seeing colin aka the master once trying to get an air lock out that was proving impossible.

used a standard header cap screwed it on and attached a bicycle pump to the cap and pumped any air thru!

worked a treat!! :D:D

A good way of testing for air locks is to put the heater on & see if it blows out hot air. Should be hot when half way on the gauge. If it blows cold there will be an air lock. This is assuming the heater matrix is ok!

Id let it go above the 3rd mark slightly, its not going to hurt anything. The std switch usually kicks in above the 3rd(3/4) mark.

Also check the rad is getting hot.

Quote:

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Originally Posted by Brigsy

A good way of testing for air locks is to put the heater on & see if it blows out hot air. Should be hot when half way on the gauge. If it blows cold there will be an air lock. This is assuming the heater matrix is ok!

Id let it go above the 3rd mark slightly, its not going to hurt anything. The std switch usually kicks in above the 3rd(3/4) mark.

Also check the rad is getting hot.

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forgot to add - ive bypassed the heater matrix as its leaking. ive simply joined the 2 hoses together.


the rad gets hot, it will do anyway as ive mentioned ive drilled the stat.

If there are no airlocks the switch in the rad has got to be at fault, or of the wrong temp rating if it doesn't come on at all.

you can test the fan and wiring easy if you take the connecter off the temp switch and bridge the two contacts inside the connector with a piece of wire or paper clip ect if it doesnt come on the problem lies elsewere in the wiring.

Quote:

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Originally Posted by raj

ok, now the cars idling is cured i thought id start a fresh thread for a fresh problem!:D :scratch:

note: ive have done away with the swirlpot and fitted a campus matrix to waterpump bleed hose.
also both my stat and fan switch are std temp and my stat has a 3mm hole drilled into it to aid bleeding.

so the problem -

the rad fan does not want to kick in at all.! the temp rises past where the fan should kick in! i shut the engine off before the temp rises too high.!

ive tested the rad fan switch and its working with a multimeter.
the relay is also ok,
the fan works if i bridge the wires,
ive also bled the system.


just to add, the way i bled the system is as follows -

• fill rad up via the top rad hose until full, wait for the coolant to drop and keep on toping the rad up until its full.
• refit top rad hose to water pump.
• fill header tank and blow coolant through the system making sure to keep the header tank topped up, keep blowing the header tank until a constant stream of coolant flows out the highest bleed hose and lock the nipple off while still blowing in the header tank.
• start the car with the header tank cap off.
• fit the header tank cap.

does that sound ok or am i doing something wrong? also to add ive not used the top rad hose bleed nipple yet as i dont know at what point i should do so?? do i even need to as my stat has a hole in it???!!


what else can i look at or do differently?

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How have you tested the fan switch with a multimeter? If you have bridge the wires and the fan runs then the fan switch is faulty. Fan switches can be abit strange when they decide to fail, work 1 minute and then give up. replace it raj then see what happens.

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Originally Posted by Tarmac trasher - Nick

How have you tested the fan switch with a multimeter? If you have bridge the wires and the fan runs then the fan switch is faulty. Fan switches can be abit strange when they decide to fail, work 1 minute and then give up. replace it raj then see what happens.

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scoff gave me instructions on how to test the fan switch:agree:

for what its worth i think i will replace the rad fan switch. time to drop the coolant for the 4th time:rolleyes:

Quote:

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Originally Posted by raj

scoff gave me instructions on how to test the fan switch:agree:

for what its worth i think i will replace the rad fan switch. time to drop the coolant for the 4th time:rolleyes:

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If you have quick hands you don't loose alot of coolant ;)

personally i'd stop all this d1cking about.

and wire it like this.

alternator +ve to rad fan switch.
rad fan switch to rad fan +ve.
alternator -ve to rad fan -ve.

done.

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Originally Posted by Sparkie

personally i'd stop all this d1cking about.

and wire it like this.

alternator +ve to rad fan switch.
rad fan switch to rad fan +ve.
alternator -ve to rad fan -ve.

done.

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i dont understand non of that..! me and electrics:sad2: plus the fact i dont want to alter something that SHOULD work as it is. id rather find the fault than diverting.

Quote:

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Originally Posted by Sparkie

personally i'd stop all this d1cking about.

and wire it like this.

alternator +ve to rad fan switch.
rad fan switch to rad fan +ve.
alternator -ve to rad fan -ve.

done.

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:agree: Although i wold put an inline fuse in there too sparkie.

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Originally Posted by MATT C Ringworm Tuning

:agree: Although i wold put an inline fuse in there too sparkie.

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The start up current from the fan motor will burn out the fan switch for sure after a short time :sad2: Hence the relay!! :coffee:

Quote:

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Originally Posted by Tarmac trasher - Nick

The start up current from the fan motor will burn out the fan switch for sure after a short time :sad2: Hence the relay!! :coffee:

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Na mate, its been tried and tested many times.

hmm, how do i decipher this electrical chitchat :scratch:

mines now bloody playin up. gana have to look 2moro. hoping just a loose connection. or air in the system.

dont worry raj i had exactly the same problem with the switch yesterday. all my wiring metered out fine, but found that if i pushed/pulled the connector plug on the switch it would work. so i had dodgy contacts.

def gonna do that wiring mod..

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Originally Posted by Harrison01

dont worry raj i had exactly the same problem with the switch yesterday. all my wiring metered out fine, but found that if i pushed/pulled the connector plug on the switch it would work. so i had dodgy contacts.

def gonna do that wiring mod..

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the thing is, i dont use the original connectors for the fan switch or the fan. im using spade connectors wrapped in heatshrink.

id look into doing the wiring mod but i cant make sence of it:scared: all this +ve -ve :confused: i need clearer instructions as im really not confident bodging wires together etc:scratch:

Quote:

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Originally Posted by Sparkie

personally i'd stop all this d1cking about.

and wire it like this.

alternator +ve to rad fan switch.
rad fan switch to rad fan +ve.
alternator -ve to rad fan -ve.

done.

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red wire from alternator positive to rad fan switch.

red wire from rad fan switch to red wire on rad fan.

black wire from alternator negative (ground) to black wire on rad fan

Quote:

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Originally Posted by Sparkie

red wire from alternator positive to rad fan switch.

red wire from rad fan switch to red wire on rad fan.

black wire from alternator negative (ground) to black wire on rad fan

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where exactly are the alternator +&- located.?

also what exactly will the above do.? will it change the way it works.?

Just change the fan switch raj. If it does'nt fix it then start looking at the wiring. :agree:

First post!

My water temp gauge had been showing that the car was running a bit hotter than normal for this time of year, i fitted a lower temp rad fan switch (k-tec) a couple of years ago but the rad fan used to kick in less frequently, so i figured the fan switch was faulty, i put the original switch back in and now everything is ok.
I also wired up a manual switch just in case the engine gets hot but i haven't had to use it so far! I also fitted a lower temp thermostat but that seems to work ok.
From the marks on the temp gauge (1'st being the horizontal base mark), the car should not go above the 3'rd mark around town or on the motorway, the needle should sit halfway between the second and third mark.

Quote:

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Originally Posted by chrisb

First post!

My water temp gauge had been showing that the car was running a bit hotter than normal for this time of year, i fitted a lower temp rad fan switch (k-tec) a couple of years ago but the rad fan used to kick in less frequently, so i figured the fan switch was faulty, i put the original switch back in and now everything is ok.
I also wired up a manual switch just in case the engine gets hot but i haven't had to use it so far! I also fitted a lower temp thermostat but that seems to work ok.
From the marks on the temp gauge (1'st being the horizontal base mark), the car should not go above the 3'rd mark around town or on the motorway, the needle should sit halfway between the second and third mark.

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i know all this already mate, doesnt help my problem but nice 1 anyway:agree: im going to fit another std fan switch and go from there:)

oh and welcome to the club:)

what rad are you using?
just a thought if its not the standard 5 item

New poster! (less than 10 posts)

thanks for the welcome raj, looking forward to lots of helpful advice and knowledge from you guys

Quote:

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Originally Posted by youngscottie

what rad are you using?
just a thought if its not the standard 5 item

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your right, im not using a std gtt rad. im using a MUCH bigger 1.9d extra van rad.
it has the same rad fan fitment as the gtt.

also while on the subject. is there anyone else that has this rad fitted that has also got the there header tank located behind the scuttle?

i ask this as im wondering if the coolant flow acts in a different way when you have the header tank sat in the scuttle and a bigger rad fitted..?

obviously im having to put a little more coolant in as the 1.9d rad has a larger capacity but whats happening is - from cold when i start the car the level is at the "min" mark on the header tank, wheni start the car and the coolant starts to flow the header tank will fill up to just under the max line! :scratch: thats abit strange dont you think:scratch:

i think the amount of coolant in the system is more than enough! it swallowed up a whole 5lts of coolant!! im sure the std capacity is 3.6lts? but as mentioned im putting this down to the larger capacity rad! does that sound right.

there is also a relay involved on the rad fan circuit ,sumtimes the relay can be at fault :)

To me it sounds like a airlock in the system,:crap: My fan would not kick in until the airlock was gone.

My header tank as been moved to behind scuttle and it took me ages to bleed system properly.

When i did mine as it got warmer the collant level rised until it came out top off the header tank, it would then drop. I kept topping it up as it did it and then it just kept still at the max mark.:cool:

Quote:

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Originally Posted by gtmatt

there is also a relay involved on the rad fan circuit ,sumtimes the relay can be at fault :)

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the relay cant be at fault.! i can get the fan to work when the wires are bridged. so that rules the relay out.

Quote:

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Originally Posted by c5 swh

To me it sounds like a airlock in the system,:crap: My fan would not kick in until the airlock was gone.

My header tank as been moved to behind scuttle and it took me ages to bleed system properly.

When i did mine as it got warmer the collant level rised until it came out top off the header tank, it would then drop. I kept topping it up as it did it and then it just kept still at the max mark.:cool:

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im hoping it is an air lock. but how to remove it the airlock is another problem:scratch:

ive tried bleeding the system as you would but its made no difference.
maybe its a cheeky feckin airlock hiding somewhere!!:scratch:
would the airlock be sitting around the radfan switch? if so,how? i thought air is suppose to rise to the highest point??mine being the header tank!
i also thought it would be easier for air to route itself out the system as ive got a drilled stat!!?

...and i was told it would be easy bleeding the system with a drilled stat and the header tank being at the highest point:sad:

Raj, I fitted a mahoosive rad to mine and had the same problems. Flicked the manual fan switch as I thought it was getting too hot. Couldn't find a fault anywhere. It was MOT time, so I knew I had to get it workin as the geezer was bound to overheat it or somethin....!

I took off the fan switch and chucked it in a pan of boiling water and got the multimeter out.... all was fine.

It just seems that the extra capacity/heat loss capability of the larger rads lets the temp rise just that bit higher at the back of the waterpump (where the gauge sensor lives) before it kicks the fan in. Mine was a bit further past the 3rd line than I'd liked. Its an 83 switch too.

Quote:

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Originally Posted by Mr_Dave

Raj, I fitted a mahoosive rad to mine and had the same problems. Flicked the manual fan switch as I thought it was getting too hot. Couldn't find a fault anywhere. It was MOT time, so I knew I had to get it workin as the geezer was bound to overheat it or somethin....!

I took off the fan switch and chucked it in a pan of boiling water and got the multimeter out.... all was fine.

It just seems that the extra capacity/heat loss capability of the larger rads lets the temp rise just that bit higher at the back of the waterpump (where the gauge sensor lives) before it kicks the fan in. Mine was a bit further past the 3rd line than I'd liked. Its an 83 switch too.

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thats sounding exactly like the problem im having!!!

how did you sort it.? i dont like the temp going past the 3rd line at all.
with all my other 5s using the std rad/stat/fan switch the temp never went past 2 and a half on the gauge and the rad fan hardly use to kick in.

although the std rad is very good i dont want to resort back to it with all the hard work ive put in to the 5 to get it to where it is now:cry:

I just left it to be honest mate. I've got a really powerful Spal fan on there, so it whips the temp down quick smart as soon as it kicks in. When you're rolling, it never gets anything near that hot anyway, even at the track. Besides, when I'm gunning it, I flick the manual switch - I've got a frontera intercooler in front of the rad, so the fan chills that down too ;)

The only time it'll get that hot is ticking over at the MOT garage, I drive the fan myself the rest of the time ;)

Guess the fix is to either get a lower temp or adjustable switch, or leave it there filling in the hole, and get one of them ones that you can fit into one of the water pipes - pick one thats leaving the engine, not a return from the rad!

:)

Quote:

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Originally Posted by Mr_Dave

I just left it to be honest mate. I've got a really powerful Spal fan on there, so it whips the temp down quick smart as soon as it kicks in. When you're rolling, it never gets anything near that hot anyway, even at the track. Besides, when I'm gunning it, I flick the manual switch - I've got a frontera intercooler in front of the rad, so the fan chills that down too ;)

The only time it'll get that hot is ticking over at the MOT garage, I drive the fan myself the rest of the time ;)

Guess the fix is to either get a lower temp or adjustable switch, or leave it there filling in the hole, and get one of them ones that you can fit into one of the water pipes - pick one thats leaving the engine, not a return from the rad!

:)

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ive got a 16" spal fan fitted to the rad.
thing is,although ive recently rebuilt this engine,the car hasnt seen the road in over 5yrs.

Tell me about it! I didn't have the balls to let it get that hot until after I had the switch in some hot water, and I was 100% that it was working! Even then, I wasn't happy about it.

Test the switch, if its working... look at something like this

http://www.demon-tweeks.co.uk/produc...pcode=GLORREFC

Quote:

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Originally Posted by Mr_Dave

Tell me about it! I didn't have the balls to let it get that hot until after I had the switch in some hot water, and I was 100% that it was working! Even then, I wasn't happy about it.

Test the switch, if its working... look at something like this

http://www.demon-tweeks.co.uk/produc...pcode=GLORREFC

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that sounds like an idea! i can fit that just after the stat yes? im assuming you use your exsisting fan switch wires on it too.?

and yes,i have tried the fan switch in boiling water using a multimeter and it works as it should:agree:
....still,im going to try another fan switch before i go purchasing something that costs that much
:)

just a quick question,sorry if it sounds daft:ashamed:.....
when looking at the std temp range on a fan switch which is 92/82 deg c if im not mistaken?(thats what i have). what exactly do the 92/82 mean?:scratch:
....does it mean - fan switches on @ 92deg.c and switches off @ 82deg.c?

also, out of interest, does anyone have ANY idea as to what/which fan switch it is that is classed as the low temp fan switch.?
low temp one is a 78/65deg.c i think.? surely the tuners cant be having these specially made for them so im assuming they are fitted to another car as a std switch?? but what car?

i know theres a peugeot one that has the same m22x1.5 thread size and has a temp range of 82/68deg.c

Quote:

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Originally Posted by raj

just a quick question,sorry if it sounds daft:ashamed:.....
when looking at the std temp range on a fan switch which is 92/82 deg c if im not mistaken?(thats what i have). what exactly do the 92/82 mean?:scratch:
....does it mean - fan switches on @ 92deg.c and switches off @ 82deg.c?

also, out of interest, does anyone have ANY idea as to what/which fan switch it is that is classed as the low temp fan switch.?
low temp one is a 78/65deg.c i think.? surely the tuners cant be having these specially made for them so im assuming they are fitted to another car as a std switch?? but what car?

i know theres a peugeot one that has the same m22x1.5 thread size and has a temp range of 82/68deg.c

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yep it means fan switches on at 92 degrees and turns off at 82 degrees

low temp fan switches on at 78 degrees and turns off at 68 degrees!

as for what car, i couldnt answer that one mate! :scratch:

hope you get this sorted mate! :D

Quote:

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Originally Posted by raj

im hoping it is an air lock. but how to remove it the airlock is another problem:scratch:

ive tried bleeding the system as you would but its made no difference.
maybe its a cheeky feckin airlock hiding somewhere!!:scratch:

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raj if it is an air lock have you tried using a bicycle pump ( rather than blowing thru it)with a header tank cap attached to it mate, just pump the air lock out!

might be worth a try!!:D

Raj, get yourself an 'Eezi bleed' kit from ebay/halfords. Job done.

hmm.ive just bought a rad fan switch thats got a range of 88/79deg.c compared to the low temp switch which is 78/65deg.c so its sort of inbetween a std and low temp switch.
now i dont plan on changing my stat,but can someone tell me the std stat temp range.?

standard is 92/82 degrees, i think, someone will confirm! :D

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Originally Posted by Frix

standard is 92/82 degrees, i think, someone will confirm! :D

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im assuming you havent read post 45.?:coffee:

89 degrees winter. 83 degrees i think for summer use. Renault used to carry both in stock years ago!!! Temp is stamped in the end of the stat.

For uffk sake, why me:brickwall:

std fan switch 92/82deg.
low temp switch 79/65deg.
semi-low switch 88/79deg.

after fitting the semi- low temp fan switch i thought id take a look at the one i removed.!
its a feckin low temp 79/82deg switch! feck knows how that got there because as far as im aware ive alway bought std temp:scratch:

what the ffff:scratch: so on top of the fan not kicking in,ive now raised the temp higher to where the fan "should" kick in:rolleyes:
going to start the car up tomorrow after the batts charged and see what happens.

feck:scratch:

:coffee:

Fit a std rad back in;)

Seriously though if this is causing problems like this surely the engine will run too cool whilst on the move, probably take ages to warm up too.

The knock on effect of cool running usually means the engine will hesitate unless you have choke on, these engines run best around the half way mark on temp gauge.

Quote:

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Originally Posted by Brigsy

Fit a std rad back in;)

Seriously though if this is causing problems like this surely the engine will run too cool whilst on the move, probably take ages to warm up too.

The knock on effect of cool running usually means the engine will hesitate unless you have choke on, these engines run best around the half way mark on temp gauge.

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no go mate,
im not about to fork out for a new std rad:( and its obviously not a good idea buying 2nd hand rads:crap:. i cant afford it anyway.

im sure/hoping its got to be an airlock..
if the fan doesnt kick in tomorrow after ive re-bled the system i think ill do the tyre valve in a header tank cap mod and pressurize the system!just need a spare tank cap to use:crap:
any ideas of how much pressure to apply?,i'll use a foot pump. and im assuming you do this with the engine off!!

either way, somethings not quite right yet.
you would have thought with a low temp fan switch in that the fan would kick in before the temp gauge needle went almost vertical.! this is the reason i suspect an airlock??!!

im almost certain its a airlock.

When i did mine the fan cut in later than usual while bleeding it the first time.

After that it was spot on.

*****

ok today ive done the following-

fitted a new rad fan switch.
fitted another working/tested relay.
bled the system using the tyre valve/pump method.
ran the car up to temp and....
the rad fan still doesnt want to kick in!:sad2:

yes it WILL work if i simply bridge the fan switch wires,i can here the relay click when i do this too.

there cant be an air trapped in the system now surely.!

theres no cool spots on the rad either.
all hoses are hot.

just wondering,
could it be that the coolant simply isnt getting hot enough in the rad to turn the fan switch on? and as mr dave mentioned is hot at the waterpump where the temperature sensor is.? but why would this happen? remember the car is not on the road,im doing all this in my garage so there no air passing throught the rad so you think that the temparture in all areas would be the same??
maybe a coolant temp sensor fitted to the bottom rad hose will tell me what temp the rad is seeing rather than the waterpump/head.?

im feeling ill have to fork out for a std rad now and fitting the 1.9d rad/16"spal fan was a waste of time/money:(.
i really want the thing to work as it should. ive noted what mr dave has done to his but surely..mr dave if your around??.. you still had your rad fan kicking in.?

i dont want to fork out for a new std rad and still have the same issues.:sad2:

its a confusing one:crap:

where abouts on the temp guage are you expecting it to kick in?(sorry if you have already mentioned this)

You could try and leave it a little longer than you think just to see if it kicks in, :crap:

obviously i dont mean leave it until its dangerously hot:sad2:

Quote:

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Originally Posted by c5 swh

where abouts on the temp guage are you expecting it to kick in?(sorry if you have already mentioned this)

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theres 4marks, the 4th being hotthott. im letting the needle get to inbetween the 3rd and 4th mark before im having to bridge the fan switch to cool it back down. in my opinion the fan should kick in at least when it gets just past the 3rdmark? maybe a touch sooner?

Quote:

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Originally Posted by c5 swh

You could try and leave it a little longer than you think just to see if it kicks in, :crap:

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nope,ive tried it and taken it beyond where the fan should kick in. im not going to risk overheating it.

Just before the 3rd mark would be ideal.

You could try bleeding it again, a lot of the time you have to hold the header tank well above the height of the wing and fill it to max, take both bleed nipples out completely and let it run out of them for 20 seconds.

Level with the scuttle area is just not high enough to bleed properly sometimes :)

Are you using the standard pump pulley and standard thermostat??

Quote:

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Originally Posted by MATT C Ringworm Tuning

Are you using the standard pump pulley and standard thermostat??

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yes, std pump pulley.
and yes a std temp stat but with a 3mm hole drilled in to supposedly aid bleeding:brickwall:

hey raj im investigating mine tomorrow so will let you know how i got on.

Quote:

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Originally Posted by Harrison01

hey raj im investigating mine tomorrow so will let you know how i got on.

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have you got the same setup as me.? extra van 1.9d rad and header tank located in scuttle.

im putting the problem down to the rad just isnt suitable for the gtt:disagree: thinking about it,its the only thing in the cooling system side that isnt std.

this'll be the last time i try to do something different on the 5:rolleyes: i always find out the hard way:sad2:.

time to bite the bullet and get the pennies saved for a new std rad or maybe one of them alloy versions unstablecable is selling.?? feck knows how ill go about mounting the 16"spal fan to a std rad though:scratch:

Raj, what side of the rad is the switch on?? It wants to be in the path of the flowing water exiting from the thermostat, ie when the stat opens you get hot water flowing past it. If the switch is on the opposite end it could be that the water is cooling through the rad before it gets to the switch. Some rads are pretty good at emmiting heat away, sometimes the stat opening and closing at the right points and reacting quick enough can actually keep the engine temp level withought the fan coming to use. This however is down to ambient temp of course. Im wondering if your stat isnt opening enough or quick enough to allow the full compliment of hot water through the rad. When that stat opens, you should see the temp gauge drop quite significantly/quickly. Have you tried another stat or even a reduced temp one?

OE, FTW has proved itself yet again ( not wishing to sound horrible Raj ;):D)

Also if all else fails, keep the rad and go for an adjustable, thermostatic switch using a capillary probe and adjust the switch to suite the temp.

Quote:

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Originally Posted by MATT C Ringworm Tuning

Raj, what side of the rad is the switch on?? It wants to be in the path of the flowing water exiting from the thermostat, ie when the stat opens you get hot water flowing past it. If the switch is on the opposite end it could be that the water is cooling through the rad before it gets to the switch. Some rads are pretty good at emmiting heat away, sometimes the stat opening and closing at the right points and reacting quick enough can actually keep the engine temp level withought the fan coming to use. This however is down to ambient temp of course. Im wondering if your stat isnt opening enough or quick enough to allow the full compliment of hot water through the rad. When that stat opens, you should see the temp gauge drop quite significantly/quickly. Have you tried another stat or even a reduced temp one?

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rad switch is on the same side as the std rad,but whereas the std rad fan switch is about halfway up the rad,the 1.9d rad is at the bottom and on the side of the rad,it right next to the coolant outlet.
i havent tried another stat.

Quote:

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Originally Posted by Kris M

OE, FTW has proved itself yet again ( not wishing to sound horrible Raj ;):D)

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i agree totally, ive never had a prob with oe equiptment:agree: its just that i wanted to try something else and thought a bigger rad without an oil cooler would have benefited the gtt. never mind eh:(

Quote:

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Originally Posted by MATT C Ringworm Tuning

Also if all else fails, keep the rad and go for an adjustable, thermostatic switch using a capillary probe and adjust the switch to suite the temp.

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i could, but id need help in source EXACTLY what id need as thing get confusing for me at the best of times.

out of interest, what is the diesel fan switch rated at ?

Quote:

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Originally Posted by Scoff

out of interest, what is the diesel fan switch rated at ?

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ive no idea mate. just to note,im using a gtt fan switch.

Quote:

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Originally Posted by raj

ive no idea mate. just to note,im using a gtt fan switch.

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I know, which is used to sitting half way up the radiator, unlike the diesel fan switch :)

Quote:

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Originally Posted by Scoff

I know, which is used to sitting half way up the radiator, unlike the diesel fan switch :)

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ahh, i see your point now. ill try and see what i can find out:agree:

Quote:

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Originally Posted by Scoff

out of interest, what is the diesel fan switch rated at ?

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it uses a 92/82deg fan switch.


just thinking, providing i can find a boss to weld on, could i not mount/relocate the exsisting fan switch to the top rad hose using some stainless pipe with an m22 boss welded on? i though this would be cheaper than buying a fancy type stat?

Quote:

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Originally Posted by raj

it uses a 92/82deg fan switch.


just thinking, providing i can find a boss to weld on, could i not mount/relocate the exsisting fan switch to the top rad hose using some stainless pipe with an m22 boss welded on? i though this would be cheaper than buying a fancy type stat?

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couldn't you just drill and tap a hole in the side of the head, where the blanking plate sits flywheel end?

Quote:

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Originally Posted by markey b

couldn't you just drill and tap a hole in the side of the head, where the blanking plate sits flywheel end?

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good idea:agree: but i think the way i mentioned would be even easier as i already have a metal pipe as part of the top rad hose. so just have to wip it off and get a m22 boss welded to it. anyone know where i can get one from:confused:

Quote:

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Originally Posted by raj

good idea:agree: but i think the way i mentioned would be even easier as i already have a metal pipe as part of the top rad hose. so just have to wip it off and get a m22 boss welded to it. anyone know where i can get one from:confused:

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Or you could just drop a capillary tube down the pipe, tighten the clip and away you go!!;)

Quote:

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Originally Posted by MATT C Ringworm Tuning

Or you could just drop a capillary tube down the pipe, tighten the clip and away you go!!;)

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a what?:scratch: sounds abit posh to me. please explain:):confused:

Quote:

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Originally Posted by raj

a what?:scratch: sounds abit posh to me. please explain:):confused:

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http://cgi.ebay.co.uk/Car-Radiator-C...742.m153.l1262

Here ya go. Get one of these, attach the switch to the original temp switch wiring, the tube down goes in the rad pipe. Bobs ya auntys fanny.:agree:

Quote:

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Originally Posted by MATT C Ringworm Tuning

http://cgi.ebay.co.uk/Car-Radiator-C...742.m153.l1262

Here ya go. Get one of these, attach the switch to the original temp switch wiring, the tube down goes in the rad pipe. Bobs ya auntys fanny.:agree:

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ahaa ok.
but how do you actually fit it in the the top rad pipe.? im not understanding how you just drop it in and tightened your hose clamp back up:scratch: what about wiring etc? surley you cant just route it out the pipe and clamp the hose down? would this not cause the hose not to seal properly? im obviously not getting the jist of it:ashamed::scratch:

ive found this one that seems to have a few more bits.

I can nock you up an M22 boss if you want Raj ? :smokin:

Quote:

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Originally Posted by Deano

I can nock you up an M22 boss if you want Raj ? :smokin:

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sweeeet mate, would be great if you can. how much£? for 2.

Do you have any idea of the diameters and lengths you need ?

F.O.C mate ! :smokin:

Quote:

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Originally Posted by Deano

Do you have any idea of the diameters and lengths you need ?

F.O.C mate ! :smokin:

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well F.O.C me:D

does m22x1.5 mean anything to you.?

i estimate the depth would be about 15mm.

just to add, are all boss faces the same? as in,is there abit of flat surface area for a washer to sit on for when i fit the fan switch?

Quote:

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Originally Posted by raj

well F.O.C me:D

does m22x1.5 mean anything to you.?

i estimate the depth would be about 15mm.

just to add, are all boss faces the same? as in,is there abit of flat surface area for a washer to sit on for when i fit the fan switch?

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Ye mate ! I'm an engineer !!

Tell me what you need me to make (sketch would be good) and i'll make a couple, :smokin:

Quote:

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Originally Posted by Deano

Ye mate ! I'm an engineer !!

Tell me what you need me to make (sketch would be good) and i'll make a couple, :smokin:

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pm 4u mate.

PM Raj :smokin:

ive not even attempted to sort this rad fan problem out yet:ashamed: but thanks to big jim racing for making me a stainless boss i can now get on with it:agree:

so,firstly ill be retrying the tyre valve in the header tank cap method to pump an airlock out if there actually is one:scratch:.
ill be relocating the rad fan switch to just after the thermostat.
ive also decided to refit the swirl pot as its obviously there for a purpose:rolleyes: i just wanted the minimalistic look:rolleyes:. i'll be refitting it behind the scuttle next to the header tank.

with all that out the way and if the problem is still cured it only leaves the radiator! i really dont want to have to replace the rad for a std one [im by no means doubting the oe rad] as ive spent bloody ages getting it to fit plus mounting a 16"spal fan to it:(


also to add, i know this isnt an electrical problem as its been previously suggested i rewire the rad fan via the alternator.
i know theres no wiring problem as i used another new rad fan switch and connected it up and placed it in boiling water with the cars ignition on.. the rad fan kicked in.

i learn the fecking hard way all the time:crap: never before on any of my previous 5's have i had this annoying problem! i just wanted to try something different with this one:sad2:. std setup all the way from now on if i decide on another 5 in the future:)....... which is doubtful.

hmm, i only got as far as pressurising the coolant system to hopefully push the suspected airlock out. and its seem to have worked:). strange how i didnt work when i tried it previously:scratch: so the rad fan now actually works:agree: it kicks in just below the 3rd mark on the gauge.
sorted:).
now on with the next issue