Quote:
Originally Posted by Terry,OH
Yes as mentioned above do not use the starter unless you can rotate the crank 720 degrees or more by hand. Beside a badly stuck valve the timing gears could be messed up or even the oil pump. I also think removing the intake manifold is the next step. also a broken piston ring could be the problem.
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I agree with the no starter. I had small gear reduction starter bend a rod on a Ford V10 with a blown head gasket at work. The vehicle was running when I parked it. While it sat the cylinder filled with coolant and when I cranked the engine it bent the rod, not just a little but a whole lot of bend. That rod is hanging out in my garage to remind me to stop and think.
It could have a stuck but if it sat for a long time and a gasket leaked coolant into the cylinder and then somebody tried to crank it, it could have bent a rod. Before you crank an unknown engine rotate it two turns by hand first before you try the starter.
Rotate the crank in the opposite direction. It rotates twice for every time the camshaft rotates once. Since you have the heads off you should be able to see all the valves move except for a stuck one. Like others said, you might as well pull the intake since it's an easy job.