So generally we came to the conclusion the next step is to get one of those oil additives for hydraulic tappets and see if it improves and possibly adjust the timing some more!
a little more timing adjustment maybe required.Still I will carry on trouble shooting.
Pretty sure a tooth out on the cam would put pistons in contact with valves.
Pretty sure a tooth out on the cam would put pistons in contact with valves. There is very tight clearances, the piston literally chases the valve back up in to the head each stroke.Just out of curiosity, what oil and filter are you using??? I have a 90 gas engine that I run on 15w40 diesel oil because 5w or 10w will make the valves extremely noisy until warmup..