signs of a bad valve?
Thread Starter
Teching In
Joined: Oct 2011
Posts: 12
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signs of a bad valve? I'm going to go look at a LT1 trans am. And the guy I'm going to be getting it from says that it has a "bent valve". When I go look at this car what signs chould I look for to know its a bad valve. He says it backfires quiet a bit when you rev it up. He thinks that the valve is sticking. What are some possible signs. Any tips will help me! Thank you!!
bent intake will pop through the intake, bent exhaust will pop through the exhaust.......as said above do a compression test it will be down dramatically look for 70-100psi on that cylinder or less........
old school test is get a good sheet of paper like cardboard paper and put it to the exhaust. Lay it on there while its running and if it get sucked in then there is a bent valve.
It should stay flapping outward the entire time.
It should stay flapping outward the entire time.
I have heard this is a pretty inaccurate test since every car experiences some sort of reversion to some degree.
