I over heated my motor and ended up with water in the oil, so i figured it was a blown head gasket. i took the head to the machine shop and had it cleand and inspected along with getting it milled and having the valves ground. i put the head and a new gasket on last night and today i did a compression test and #2 has only 30 psi. i took the head back off and inspected the cylinder but i couldnt see any dammage. does anyone know what is causing my leak? i figured for a leak that bad i should see a big crack in the cylinder wall but i dont.

 

Valve clearance too tight, hanging valve open slightly?

 

Did you make sure the block was completely level? Not warped at all?

 

no i just cleaned off the mating surfaces and put the head back on with a new gasket.

 

check the deck and double check valve clearances

 

Especially if you overheated, making sure both the head and block are completely level is a good thing.

 

it was the valve lash. thanks

 

Glad you got it figured out, and it was something easy & cheap!