AusS2000

I dunno.

And I do know my car passed a pressurisation test but had a blown head gasket all the same.

I'm guessing my headgasket was sealing enough to withhold the 15psi of the cooling system but not enough to seal in the extreme pressure of the combustion of air/fuel mixture especially as it enters the combustion chamber at 22psi and then explodes.

azn201

So when your head gasket was bad did your car exhaust blow out a lot of smoke? Was there any major symptom you could tell? I just want to make sure it COULD be the head gasket before I pay to get a mechanic to check on it. My car idles fine and the exhaust fumes is fine. No weird smoke or whatsoever. Thanks again.

AusS2000

Nope, the only sign was intermittent overheating.

Basically the system was fine under normal conditions. But everytime I got on it some exhaust fumes made it into the cooling system. This eventually resulted in a overheating. I would bleed the system and it would be fine again for a day or two.

I do my own work, but was very reluctant to pull the head when it had passed all the usual tests. I eventually bit the bullet (after 4 months of procrastinating) and sure enough it was the head gasket.

JackS

If you haven't already, tighten all your hoses. It seems to me that at a minimum there would at least be some discoloration around or in the area of any leak. look for stains on adjacent parts. Do your best to confirm that all hoses are tight. If there is none in your oil, the coolant is going somewhere and should be leaving behind some evidence..

azn201

Yeah I am going to check all my hoses on Sunday before I send the car to the shop. I hope it is something minor to fix... Thanks again.

azn201

Finally got it fixed at BlackTrax after so long.