|
sounds like either melted piston or a valve burned and no longer seating/sealing fully. if you have access to a leak down tester (different than a compression tester) thats your best bet. or you can try adding a small (maybe a tablespoon or less) of engine oil directly in that cylinder (the 70 psi one), and then compression test it again. if your compression comes up with oil in it, you have bad piston rings. its a longshot and you'll need a teardown either way, but... knowing is half the battle right?
|