How can you tell it's a blown h/gasket?
#1
How can you tell it's a blown h/gasket?
Ok ran across a decent deal on a 93 firebird. Good metal some damaged plastics. Anyways it's a V6, the guy said head was blown had the milky oil ect ran like crap but ran. Towed it home, started tearing down the head. Long story short got down to the head gasket to me it looks fine, I don't see any break or anythign like that I'll upload pictures soon to try and get some input from you guys I'd appreciate it. I know leakdown test would have been better but I read soo many post that it was 99 percent the head gasket. So I jumped right in. Any ideal what else it could be? Give me ten minutes I'll have pics of the head.
#4
there is a few things to look for.
1)check metal ring on gasket for a split in ring on edge where it would be in cylinder.
2)there rings around coolant ports on intake gaskets also look for split where it would be in coolant port.
3)if it is head gasket there will be one or more pistons that will be cleaner than the rest-called cylinder wash-
4)you can wire brush between valves to check for visible cracks(very small)
5)if you can't see any of that you should have heads magna-fluxed at machine shop.
can't see what to look for in these pics but that is what you can do to find yourself
1)check metal ring on gasket for a split in ring on edge where it would be in cylinder.
2)there rings around coolant ports on intake gaskets also look for split where it would be in coolant port.
3)if it is head gasket there will be one or more pistons that will be cleaner than the rest-called cylinder wash-
4)you can wire brush between valves to check for visible cracks(very small)
5)if you can't see any of that you should have heads magna-fluxed at machine shop.
can't see what to look for in these pics but that is what you can do to find yourself
#5
above is a good explination.. soemtimes it is hard to tell where the leake was as it can be very tiny.. probbaly best idea is to go ahead put in a new gasket then build it back up (probbaly want to replace the intake gasket also) and see how it runs... if all is OK then hey you got it, if not then start with a compression test
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