Right peeps, got the F7R fired up yesterday to met with a massive cloud of oil smoke, I thought turbo but it turns out no.4 was filling with oiljust got the head off to met with nothing, everything looks mint, only thing I can think of is the head gasket didn't take but ive never heard of an MLS hg not sealing.
Any ideas?
is it an after market hg or are they mls stock? could need a bit more torque than an oe one to seal? did you use new head bolts?
Cometic MLS gasket, brand new head bolts off the club shop, torque was 90 instead of the factory 65 so that weren't the problemOriginally Posted by Adey aka Ewok
Piston rings have now got a clean bill of health, so its either the head gasket or the head, head looks mint so I'm gunna stick an OE gasket on and see what happens, wish me luck
multi layer steel on a f7r? hope your deck was as flat as your head! from what i understand and have read it needs to be a almost machined flat surface which is what i did for my f4r which is why i think it sealed.you will be so much better off with a std gasket, it will allow for more deviations in the deck and be a better weak link when it blows up next week
Well the head and blocked were checked by the machine shop so that shouldn't have been a problem, gunna try a OE gasket Tuesday and see how it goes.multi layer steel on a f7r? hope your deck was as flat as your head! from what i understand and have read it needs to be a almost machined flat surface which is what i did for my f4r which is why i think it sealed.
What makes you think it'll blow up next week?
tap out the threads in the block and screw the bolts in by hand to check that they don't bottom out before they'd clamp the head.
I did that during the original build
overfilled with oil? valve guides worn, breathers blocked, exhaust full of oil?
Oil was just above min, valve guides were spot on, breathers were brand new, exhaust is only full of oil after i started it, there was no oil before hand, defo oil getting in the bore, 3 plugs came out fine, no.4 came out dripping with oil, head off should the piston covered in oil
is it a complete rebuild? made sure your rings and oil scrapers where in correct positions? full of oil is a weird one, did you check compression before taking head off?
check the mls gasket for oil marks between the layers of gasket i had this problem on my c1j when i used a mls gasket as the oil was getting across threw the layers of gasket went back to a standard one in the end.Block and head have to be skimmed to use these mls gaskets to make sure you got true flatness thats what was done to mine f7p turbo
Yep complete rebuild, pistons, rods, bored block the works
Let me go checkcheck the mls gasket for oil marks between the layers of gasket i had this problem on my c1j when i used a mls gasket as the oil was getting across threw the layers of gasket went back to a standard one in the end.Block and head have to be skimmed to use these mls gaskets to make sure you got true flatness thats what was done to mine f7p turbo
Yep there's oil in-between the layers of the gaskets, I guess that confirms it, the gasket didn't seal properly, OE gasket is in thencheck the mls gasket for oil marks between the layers of gasket i had this problem on my c1j when i used a mls gasket as the oil was getting across threw the layers of gasket went back to a standard one in the end.Block and head have to be skimmed to use these mls gaskets to make sure you got true flatness thats what was done to mine f7p turbo
There's countless issues with the Cometic gaskets, the Nissan guys steer well clear of them as they go prematurely quite often, and have sealing issues.
sounds promising - now get on and whip Handy around that track.
Wont be a problem
That's more like it - welcome back.Wont be a problem
Ok wasn't the head gasket
whats cracked?
Cometic gaskets are used by most of the high power honda boys with no probs at all.. I wouldnt blame the gasket, id blame the finishes in most cases..
get some pics uploaded., 300 eye's are better than 2 sometimes matey...Ok wasn't the head gasket
Haven't got the head off yet, when I get a chance tomorrow after work I'll get some pics up but there's nothing major to look at other than the piston covered in oil
And again?
That is good advice - unfortunately I learned this the hard way
After a sterling effort by Handy we go it started, albeit with no exhaust at all so it pissed off the neighbours lol but next to no smoke, can't be 100% sure all is well till I've got everything back together and had it running for a good 15mins to clear it's guts but things are looking up.
Did a compression check before taking the head off and got
No.1 180psi
No.2 180psi
No.3 190psi
No.4 210psi
So we discounted rings and chose not to pull the piston out and concentrated on other possible causes.
What did we find you ask, well it looks like the locating dowels were stopping the head gasket from sealing properly.
Much appreciated for the help Handy, I owe you a domino's
Nice one Olski - glad you're getting it sorted, you'll be up and running by 1.45pm next Friday, smoking off the rebuild oil and smeg as you roll up to 5 ways. LOL
Dude I'll be driving it into bury Saturday night to get some miles on it if all goes to plan but I'm not getting my hopes up yetNice one Olski - glad you're getting it sorted, you'll be up and running by 1.45pm next Friday, smoking off the rebuild oil and smeg as you roll up to 5 ways. LOL
Bugger, it wasn't the locating dowls causing the problem, nor is it the head bolt holes being dirty.
Pulled the head off and done what I shoulda done the first time and pulled out piston no.4 to check the rings, there intact but they have shifted, they weren't totally online but they were bloody close, I think it's the type of ring compressor I have that caused it but don't know for sure, hopefully by the end of today I'll know either way if it'll make national day.
Wish me luck
Good Luck
Nope still smokes, its not a full on blue smoke, more of a white with a blue tint but there's no sign of oil mixing with water and the only thing we find in the bores is oil, we by passed the turbo to make sure but still no change.
At idle or there abouts the smoke is less but as u increase the revs it smokes more and more, took it for a drive to see if it would clear but nothing.
As it stands it won't make it to national day, please someone save me
Is the head flat?
have you gone onto boost? maybe it just needs a good thrashing to get the rings to dig in a bit, i know it fixed my 5 when it wouldnt stop smoking
bed it in fast and it'll always be fast is my cousins moto when it comes to 5's
I've read this as well, you need to load the rings then let it run down on the engine, then load, do this a few times in 3rd or 4th up to about 5k, thats how I'm going to do mine, warm up to temp, drop oil, change filter, load rings as above on low boost, then turn boost up a bit & drive about normally with a bit of boosting for 100 miles otr so, another oil change, then give it more boost & more rvs for a few hundred miles then death after that, another oil change around 1000 miles.have you gone onto boost? maybe it just needs a good thrashing to get the rings to dig in a bit, i know it fixed my 5 when it wouldnt stop smoking
bed it in fast and it'll always be fast is my cousins moto when it comes to 5's
Have you still got your C1JNope still smokes, its not a full on blue smoke, more of a white with a blue tint but there's no sign of oil mixing with water and the only thing we find in the bores is oil, we by passed the turbo to make sure but still no change.
At idle or there abouts the smoke is less but as u increase the revs it smokes more and more, took it for a drive to see if it would clear but nothing.
As it stands it won't make it to national day, please someone save me
NopeHave you still got your C1J
Yes, perfectly flat
Cant as the trigger pattern is causing issues, looks like I need a stand alone trigger wheel before I can make any progresshave you gone onto boost? maybe it just needs a good thrashing to get the rings to dig in a bit, i know it fixed my 5 when it wouldnt stop smoking
bed it in fast and it'll always be fast is my cousins moto when it comes to 5's
Pretty sure the volvo 200mm flywheel works with adaptronic, should work with other aftermarket ecu's as well.
It worked on omex on my mates car but he did change the sensor as he said the oe one was crap.
good call , did mention that the pick up might be causing an issue last night
but ollie said it was mm perfect on the wheel, as regards to engine he has now realised the rings need bedding in, so all in all a lot of panic over very little , 10 mins of google searching
Andy u werent supposed to tell them that, I'm gunna have to tell them about your car not restarting even though we had the fueling spot ongood call , did mention that the pick up might be causing an issue last night
but ollie said it was mm perfect on the wheel, as regards to engine he has now realised the rings need bedding in, so all in all a lot of panic over very little , 10 mins of google searching
Had to change the tdc sensor on both my clios as the sensor started playing up, I use a ford one now
i will just blame it on that leaky fuel cell
from what Ford? does it have same fitment to the JC5 box?
Nothing to do with fact we'd used all the fuel up and 45minstrying to figure out why it wouldn't restarti will just blame it on that leaky fuel cell
No mate had to use an adapter, I'll find out what it's off tho, black top zetec rings a bell tho?
Did you change the cranking fuel value's???Nothing to do with fact we'd used all the fuel up and 45minstrying to figure out why it wouldn't restart
Yeah we kept richining it up but the plugs were dry, the values we were at the bore woulda been full of fuel, I think our next step was pull the reg off and check it weren't blocked, then the immortal question "Andy has it got any petrol in the tank?"
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