Vehicle & Technical > Discovery
Have I done the head gasket
Range Rover Blues:
It's not worth the risk, a light skim will give a good surface for the new gasket and I'd put mone on it being slilghtly dished even if it hasn't overheated.
in theory once it's been used, heted (warped) then skimmed true again, a reconn head should be less prone to head gasket failure in the future. In theory :-k.
Ja1983:
--- Quote from: Range Rover Blues on February 06, 2008, 18:23:04 ---It's not worth the risk, a light skim will give a good surface for the new gasket and I'd put mone on it being slilghtly dished even if it hasn't overheated.
in theory once it's been used, heted (warped) then skimmed true again, a reconn head should be less prone to head gasket failure in the future. In theory :-k.
--- End quote ---
so long as you use a decent quality head gasket, i`d agree... in theory
TDi90:
when you say decent make... what do you mean genuine?!
how much for a genuine one?
R
clover:
Hi
Got the head off Pinky.
Had a good look at it. The head gasket looks fine. I can't see anything obviously wrong with it. Which was not what I was expecting at all!
Cylinder 3 has a large quantity of engine oil in it and was obviously hydraulic lock on that oil. It was in on a compression cycle.
IF the cylinder head gasket is OK (ha ha) how else could that amount of engine oil get in the cylinder? Should I be replacing the valve seals just in case one of them has failed spectacularly?
Ho hum...
John
Range Rover Blues:
I'm a little confused, the valve would have been able to open no matter how much oil was in there, but the engine would not have been able to run through the compression stroke, so was your engine hydraulically locked?
I suspect that in fact it found it's way in there whilst you were stripping the engine, which is better news for you.
However re-reading the post I notice you have had hydraulic lock/blue smoke, so perhaps the gasket was just on it's way out and as you released the pressure you got a lot more than usual.
If so you need to look very closely for any dark marks on the gasket and block/head faces. It won't be carbonised like a blow-by because it's oil, so there will be very little tell-tale marking.
Otherwise you have a serious problem. You shouldn't get that much oil down a valve stem even with no oil sea on it at all, so where else can it be coming from?
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