235 running rough and knocking under load so I removed the valve cover and found the intake push rod out from under the rocker arm on #6. I was able to put back under and felt like it seated in lifter so ran engine and it looked to be ok. 0 psi of compression in 4,5 & 6. 1,2,3 120# 110# &90#. put air into # 4 spark plug hole and heard it leaking out thru I think exhaust.
removed rocker arm rack and tried again and was getting pressure trying to blow my hose out. removed #5 plug and the air into #4 comes out #5 plug hole so that would explain the air leak through #5 exhaust valve as the air went into #4. #6 seems to have some pressure now so maybe I had the pushrod too tight and it was holding the valve open. Maybe I 'll get lucky and only need a new head gasket and not cracked some where. any thing else I should try before I pull the head ? or what else should I look for? I had this post under 12 v coil before because I thiught it was a spark knock.

Last edited by chevymgb; 07/29/2009 2:22 AM.