So I just want to be clear does the compression check on the cylinders and all are holding pressure does this verify its not the head gaskets? Or is it still possible?

 

for the cost,id look at replacing the motor with a good running one. If you could do it yourself,but with you asking,i guess you cant. Good Luck

 

Not necessarily. A cooling system pressure test, or pressurize each cylinder with compressed air and watch for bubbles in the radiator, or if it runs, check for hydrocarbons in the radiator. Those are all more conclussive tests than a compression test. A very simple test, if it runs, is fill the cooling system, start the engine and feel the upper radiator hose, or put a pressure tester on it and watch for pressure increase. If a head gasket is leaking internally, the pressure will increase and the upper hose will get hard real quick.

 

Very common for the lower intake gasket to fail I have replaced on two of mine so far not looking forward to doing it on again. Go felpro. I'd put my money on the lower intake gasket being your problem..

 

I also have a 01 Blazer 4.3 that has water getting into the oil, runs fine though. It failed the hydrocarbon gases coming out of the radiator test. Could this still be just a intake gasket leak and not necessarily a head gasket (as my mechanic thinks)?
Thanks

 

luke,cant know until you dig into it. unless its leaking outside.

 

Hydrocarbons come from unburned fuel in the exhaust. There are only two ways it can get in the coolant, bad head gasket, or a cracked head.