Originally Posted by mcma111
Your going to have to remove the tensioner and shaft and test the one way clutch. Hold the shaft (by the flat at the end of the shaft) with a pair of vise grips and see if you can get the clutch to skip when pushing backwards on it. Perhaps there are wear or flat spots on the shaft that are allowing this to happen. You do know that if the chain tension is not controlled that the chain can jump some teeth and even allow the valves to hit the piston. You don't want this to happen do ya??
Okay that makes sense, if the locking mechanism fails eventually the spring will fail because it's not meant to hold pressure forever. Cam chains that jump teeth never have a happy ending, uhhem, my long gone '70 Bronco and sourjon backing down a hill in gear using the clutch are strong reminders for me.