plywood
Recovered N/A
All that makes me think a crack in the head. Just a guess. I think I would start it with the valve cover off and see what I hear.
If your chose to pressureize the cylinder to hole the valve up and take a spring off if not at tdc if that valve happen to have any damage or leak it could fall in or be bumped in on accident it seems a little risky to me
could you go by firing order? or just feel the air from the GP hole when you rotate the engine.
Okay you are confusing yourself, with the piston at tdc there is no way to loose the valve, no need for air or anything fancy. Nada.
Compressed air works and is a reliable way of holding the valves up and I’ve done it when just upgrading valve springs on an already healthy engine, with your engine having valve issues already, I would not use this method.
1 and 4....at tdc
Turn crank 90 deg
Then next pair in fireing order sequence....meaning first one after cyl 1 and first one after cyl 4...turn 90 do it again...turn 90 and once more.....eazy peasy guys
JM7.3CW EH!