Cooling pressure issue's........

[Big-_-Steve]

Rite first off i re built my engine due to blowing the head gasket from what appeared to possibly have been from a previous problem, i've had head skimmed beautifly through marky mark contact and was all clean and lovely. Put it all back together fired it up and water was pissing out between the turbo and turbo elbow, and the rad hose's go rock solid within seconds. I am just wondering could a cracked piston liner be the cause of this ??? I did wonder if it was down to me cocking up putting it back together but am clutching at straws lol !!
Any suggestions.........

[Schakal]

sounds to me like compression is leaking in to the water ways causing
them to go under high pressure which will eventually blow coolant
pipes etc .

i would do a compression test to find out the offending cylinder/s than take it
from there .

[Big-_-Steve]

You think the compression could be leaking in from a cracked liner ??

[Schakal]

You think the compression could be leaking in from a cracked liner ??


sorry never dealt with wet liner engines , on f type renault engines
it leaks from the fire ring into a water way causing it to over pressurize .

assuming you got a new gasket and its not yet buggered ,anywhere close to
a water way on the head/block is a suspect .

[Big-_-Steve]

Ok cool i'l get a comp test done asap !!

[stuTHC]

A crack liner would cause the coolant system to pressurise, so could an incorrectly fitted head, or even poor liner protrusions.
How does it sound when it's running? It'll sound terrible if it is a cracked liner.
Comp' test is the next step fella :agree:

[Robbo]

stu thc knows all about this:)

[Robbo]

will it even run with a cracked liner?

[stuTHC]

will it even run with a cracked liner?


Depending on the size/position of the crack, yeah, very rough thou, it's all about where the crack is ;)

[Big-_-Steve]

it runs ok not to rough but the pressure build's within second's !!! Is it worth taking head off then bolt it down again n see what happens ???

[Markey Mark (BD)]

it runs ok not to rough but the pressure build's within second's !!! Is it worth taking head off then bolt it down again n see what happens ???

No you can't really do that mate as the gasket is already compressed and ou can't do it a second time, if you remove it it'll be another head gasket.

It be honest i'd remove the head anyway and have a look, if your not enitrely sure what everything looked like before i'd check it all.

[Nick k]

Is it possible that the dow pin is not allowing the head to sit down proberly on the block due to it having a slim. If its pressurising in seconds i doubt its a liner cracked, points more to head gasket issues.

[TrixNFlix]

Is it possible that the dow pin is not allowing the head to sit down proberly on the block due to it having a slim. If its pressurising in seconds i doubt its a liner cracked, points more to head gasket issues.

I reckon you would of noticed the head not sitting right when the gasket was put on, but you never know, come on lad time to whip your head off!

[TrixNFlix]

Also to note my header tank was pressurising itself instantley when engine was switched on, 20 miles later this happenedhttp://www.rtoc.org/boards/showthread.php?t=8026
I would do a compression test first, then if somethings not right head off time.

[Big-_-Steve]

AHHHHH MMMAAANNNNN !!! Looks like im gonna have to get dirty lol what bout head bolt's will i have to replace them again ??? oh any 1 got a up rated head gasket going cheap lol
cheers for all the tip's btw people

[Markey Mark (BD)]

AHHHHH MMMAAANNNNN !!! Looks like im gonna have to get dirty lol what bout head bolt's will i have to replace them again ??? oh any 1 got a up rated head gasket going cheap lol
cheers for all the tip's btw people

I can get you a headgasket pretty quick mate if your in a rush for one.

I dought its the headgasket as you haven't even driven the car yet, i'm sure it'll be something stupid or quite obvious.

[Big-_-Steve]

Thats the only thing i can think of buddy cause there's no other water feed to the turbo or the manifold etc !! i'l leave it together so you can have a look then go from there because i don't wanna take it apart for nothing.

[Markey Mark (BD)]

How you mean no other water pipe to turbo?

Yeah leave it as it is and i'll pop over and have alook mate

[Big-_-Steve]

ya know theres the water pipe that comes from the water pump kinda area to turbo then back i've looped it so it don't go to turbo

[RICHIE]

why not take the spark plugs out and see if there is water present try cranking it if need be.

[scratcher]

I'll back down with my cracked liner worries as it sounded fine putting it back in the garage.
I well hope its something simple :agree:

[Nick k]

Steve, Are we talking about the raider here that you need working for next weekend?? :crap:

[Nick k]

Steve, Are we talking about the raider here that you need working for next weekend?? :crap:

Forget that?? different big Steve lol :)

[markey b]

will it even run with a cracked liner?

i made it from the pod to the bp on the A45 with a cracked liner, just drove it turning it on and off and coasting alot!

[Big-_-Steve]

Rite people here's an update i took out plug's spun it over and it spat water out on number 2 cylinder (from rite to left)
If ya read this marky mark it's the 1 where it had been pinkin the head and the piston etc i replaced if this helps with any diagnostic lol

[TrixNFlix]

Rite people here's an update i took out plug's spun it over and it spat water out on number 2 cylinder (from rite to left)
If ya read this marky mark it's the 1 where it had been pinkin the head and the piston etc i replaced if this helps with any diagnostic lol

so are we thinking it's not fueling right for this piston?
If so it's probably the headgasket gone and not the water ways cracked in head or piston liner

[TrixNFlix]

One of the big cheeses will have to tell you why it looks to be underfueling on that cylinder again. I don't know enough About this subject.

[TrixNFlix]

But I do know that you may aswell start taking the head off to look at it and the headgasket while you wait for the big cheeses to reply.

[Big-_-Steve]

Rite yet another update, took plug's out and it fired water out like a water pistol lol but there dosen't seem to be any obvious signs of fault oh and remember the car hasn't actually been drivin since re build.

[Big-_-Steve]

Heads off and can't see anything obviously wrong so think am gonna put it down to my stupidness lol !!

[RICHIE]

have you taken the liner out then and inspected it closely have you checked your liner protrusion.

[Big-_-Steve]

well from what i can see of the liner it look's sweet, and am guessing you mean do the liner's sit flush cause i didn't check lol is it a case of putting summit flat across em to check ?

[TrixNFlix]

Yeah the liners are supposed to be stacked like steps, for the best clamping force. Also check to see if their is much protrusion between the liners and block

[TrixNFlix]

U should also be able to check the headgasket to see how even and well it clamping down on the block and head. I.e check that the indentations are even at the front and the back.

[Big-_-Steve]

So do you mean the liners should sit a little bit up from the block kinda thing ? cause all mine sit pretty much flush. and i know it won'y be exact kinda thing but is there usually a tiny bit of back n forth play in them ?

[RICHIE]

So do you mean the liners should sit a little bit up from the block kinda thing ? cause all mine sit pretty much flush. and i know it won'y be exact kinda thing but is there usually a tiny bit of back n forth play in them ?

run a striaght edge accross the liners see if that one sits lower that the two either side of it mate.

[Rob@Backyardracing]

get some pics up aswell if poss.....

[Big-_-Steve]

I put a sraight edge across and couldn't really see any kind of gap..... is it gonna be easier to take em out and put new liner seals in ?
So basically 2 of the liners will sit slightly higher than the other 2 ?

[RICHIE]

I put a sraight edge across and couldn't really see any kind of gap..... is it gonna be easier to take em out and put new liner seals in ?
So basically 2 of the liners will sit slightly higher than the other 2 ?

the should be like a set of stairs mate not one up two down ect . i have liner seals if your stuck i did say i would pop down. scratcher should also know by now hes watched me a few times get him over. before you fit the seals though put them in situ without them and check protrusion

[Big-_-Steve]

Oh rite i get it now so 1 is bit higher then the other 3 go bit lower each time ? your working away though ain't ya ? i'l have the seals off ya cause am guessing i need to do that as they don't sit like that at all lol.

[RICHIE]

Oh rite i get it now so 1 is bit higher then the other 3 go bit lower each time ? your working away though ain't ya ? i'l have the seals off ya cause am guessing i need to do that as they don't sit like that at all lol.


if they dont step correctly this could be your problem then fella. take out all liners and start again from fresh if you send me your address i will get the mrs to post the seals as im away at the moment.remember put them in situ without the seasl fitted and measure protrusion first.

[scratcher]

I'll help ya the best I can Steve. Richie showed me a few tricks ;)

[Big-_-Steve]

Coolio gangster !! think am gonna be taking bottom end apart now so can change the seals cause i think it's clear they need doing !!!

[Big-_-Steve]

I HAVE POSSIBLY FOUND FAULT !!!! After going out and taking another look with a fresh set of non sleepy eye's i discovered a crack in the liner !!!! i would put pic on but dunno how to lol

[Big-_-Steve]

All i need to suss out now is why it keep's busting that 1 particular liner !!
Ang suggestions.......?

[RICHIE]

All i need to suss out now is why it keep's busting that 1 particular liner !!
Ang suggestions.......?

how many times has this liner cracked then

[Big-_-Steve]

it's only cracked it once but last time it burn't piston out and scored liner

[RICHIE]

it's only cracked it once but last time it burn't piston out and scored liner

is the piston 2 by any chance mate from flywheel end

[Big-_-Steve]

yeah buddy !!