[Mk2] [Turbo] where is the coolant entering the combustion chamber?
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Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
it looks like cylinder4 to me.
i think there is a mark where the dowel touched the head on previous installation
(does anyone have part no for these pls). I cant be sure whether this is the point of failure hence i am here! what could have caused that mark on the barrel, piston slap?
Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
thats surely gotta be from a piece of engine/plug/turbo etc...have you got any swrf in the oil?
..have you got any swrf in the oil?Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
no but it isn't really an issue because compression is a1, the rings sit just below at tdc it also looks worse than is because how close the picture is. i assume it is piston slap as there is back fourth play in the crown at tdc (they are forged too so oval when cold)
i really need to find were the water was getting past and why???
i assume it is piston slap as there is back fourth play in the crown at tdc (they are forged too so oval when cold)i really need to find were the water was getting past and why???
Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
Have you stuck a rev 3 hid on a rev1/2 lump...if so then you gotta use the rev2 hg.
..if so then you gotta use the rev2 hg.Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
I can't say for certain, but that photo of the cylinder bore looks like a crack to me.....
....Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
is that right? never had the head off mine so just speculating.
..Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
djpkins wrote:Have you stuck a rev 3 hid on a rev1/2 lump.
are you sure, most ppl use the rev3 hg from what i have read on here?where can you get a rev2 metal hg from pls?
Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
Slarty wrote:I can't say for certain, but that photo of the cylinder bore looks like a crack to me.
it does kind of yes but it seems far to neat, not to mention compression test etc! i am stuck here until i know for sure what has caused this?
Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
i think this maybe??
Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
I thought it was a rev2 gasket used...or you gotta drill that out surely...gazrev1tubby...shmed...deffo both of these memebers have done this conversion, pm them and see what gasket to use.
..or you gotta drill that out surely...gazrev1tubby...shmed...deffo both of these memebers have done this conversion, pm them and see what gasket to use.Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
I've used a stock rev 3 metal one, rev 2 block, rev 3 head. That said, it's not started yet, so can't guarantee it's right 
That said, it's not started yet, so can't guarantee it's right January 2014
May 2015
Still in the garage...
May 2015
just have this niggling thought that if I rip out the wiring, then the car will never get out of the garage again.
Still in the garage.
..-
Driftlimits Performance
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Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
They don't have holes on the hg where there are on the head to maintain a high coolant pressure around the head. Goes straight on. That gasket looks like it had a few failure points to me.
Goes straight on. That gasket looks like it had a few failure points to me.-
gazrev1tubby
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Re: [Mk2] [Turbo] where is the coolant entering the combustion chamber?
I bought my cometic headgasket\s from real street performance in the usa, and they only list one for all revisions. Afaik, they are all the same
That looks like a score on the cylinder wall to me, did you have a problem when fitting the rings? Did you use a ring grinder and set the gaps correctly ?
Either that, or a bit of swarf may have been stuck somewhere.
A compression test would give good results, even with a scored cylinder wall. As you crank the engine, oil gets squirted up which would seal it. Even a leakdown test may not pick it up as it's done at tdc, so if that score is below tdc - it won't affect compression
Regarding the loss of coolant, where does your header tank overflow route to? Could it have been overflowing under pressure where the stat was stuck closed ?
If the head gasket pictured has only been used once, then i'm shocked at the condition of it. It looks battered !
Afaik, they are all the sameThat looks like a score on the cylinder wall to me, did you have a problem when fitting the rings
? Did you use a ring grinder and set the gaps correctly ?Either that, or a bit of swarf may have been stuck somewhere.
A compression test would give good results, even with a scored cylinder wall.
As you crank the engine, oil gets squirted up which would seal it. Even a leakdown test may not pick it up as it's done at tdc, so if that score is below tdc - it won't affect compressionRegarding the loss of coolant, where does your header tank overflow route to
? Could it have been overflowing under pressure where the stat was stuck closed ?If the head gasket pictured has only been used once, then i'm shocked at the condition of it.
It looks battered !