hey guys my buddy bought a 91 tsi awd auto.. anyways it was SEVERLY overheated to the point where the spark plug cover melted and the timing cover melted as well. but anyways.
we got the head decked and it was heavily warped says the machine shop.. and it passed a vaccum test. (without the valves installed)

so we put it all back together new head gasket and all and properly timed . and it has like 20 psi across the board. this car didnt skip timing it just over heated. anyways. i hook up the compression tester adapter to a air compressor and there is alot of air coming out the intake and exhaust. so i took the timing belt off and moved the cylinders to a neutral point and then moved the cams accordingly so the valves are compltly shut on the cylinder im pressure testing.. yet it still leaks. is it possible that the valve seats warped and just need a heavy lapping ?

also there is some scoring in the cylinders. and we were getting preety heavy blowby while cranking the motor over.. (wouldnt start)

so now we are tearing it back apart. and we are replacing the rod and main bearings and rings while we are in there.. we are gonna check for bent valves. (although no evidence of the valves hittin the pistons) and then we are gonna do a heavy lapping process on it to see if we can get the valves to seat again..

any input would be greatly appreciated.. and if you know whats wrong here please feel free to give me a call
15866626315
thanks alot
chuck