Quote:
Originally Posted by ike84
I just had a horrifying thought - what if I am completely wrong here and I have actually blown an internal engine component that is transmitting pressure from cylinder to the cooling system. I know the head gaskets are rock solid on an M96 but that could do it? Cracked cylinder I would think would cause serious intermixing of fluids and very slim chance of pressuring the coolant system. Ring failure wouldn't pressurize the coolant system, I don't think.
Oh my....
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Not to scare you even more, but that's a common method of failure in Subarus: Failing HG causing pressure into the coolant system. You can often see the bubbles coming up in the expansion tank. No oil/coolant intermix, generally. I don't know if the same happens in the M96. And like you said, M96 HGs are rock solid.
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