06-02-2013, 10:10 PM
If the valves stuck open when you crank it the air will be pushed straight out the intake again, so there's nothing to compress. I can't see how that would happen though as the piston would obviously hit the valve if that was the case.
As ruan says, get the cover off and look at the lifters....
As ruan says, get the cover off and look at the lifters....