Bluecollerboater
Contributing Member
ok. my main problem is i have low compression in 2 cylinders. here is the deal. I have 170 psi in all but 2 cylinders. they are not on the same side, so head gaskets are ok. the 2 i have a problem with are 3 and 4. they are the 2nd cylinders back on either side. the #3 on port side is 130psi and the #4 on starboard side is 100 psi. when i saw the first one low i thought it might be a sticky valve. then when i found the 2nd one low exactly opposite i am wondering if there is an intake gasket blown or something else. it seems weird the 2nd cylinder back on both sides are low. I was told to do a leak down test, but I do not have a leak down tester. The best case scenario here is the heads have to come off anyway correct?