So...if the driver's side timing chain tensioner is removed without locking the cam I learned that the cam will rotate and skip several teeth. Of course this all happened so quick I couldn't tell which way the cam rotated. My big worry now is are the valves and pistons okay. Of course the crankshaft wasn't in the safe position (keyway at 9 o'clock) when this happened, it was at about 7 o'clock. I read where one guy had this happen with his keyway at 4 o'clock and everything turned out okay. So is there a way I can check that the valves and pistons are okay (besides pulling the head)? I look forward to any help you guys can offer. Thanks!