Quote: Can't you run the engine without valve covers and listen with a peice of plastic tubing?
Is it possible to grab each push rod while it's running to see if anything changes?
I've been running it without the valve covers on. got a nice puddle of oil on the floor now from all the splash/splatter that flings off! haven't tried grabbing a pushrod though, I'm afraid to get TOO close to the moving parts and getting a body part pinched, cut, smashed, etc.
and it's hard to hold plastic tubing, screw driver, etc. up to a moving part to listen for the noise