HELP! Tapping noise...
Like many people post here, I have a tapping noise.
Background: engine dead because prior owner drove it with no coolant. Radiator had a crack. We pulled the engine, stripped it, everything looked great. No sludge.
Had heads redone, including some straightening and reassembled it all. We did not replace the chains/guides/tensioners because wear looked minimal, tensioners were not fully extended, and the set is expensive!
Fast forward, engine runs smooth, no codes, but we do have a tapping noise. Stethoscope doesn't help much, but it seemed like sound was from drivers side front tappets...
Pulled valve cover, replaced a few tappets, noise still there. Again stethoscope doesn't help much. Pulled pass side valve cover, still sounds like it's the drivers side... sound radiates thru timing chain passages but does sound like it's the drivers side.
Going crazy here. Don't feel like pulling engine again, thinking of driving it until something actually fails.... not the pollution valve or exhaust...
Thoughts? Could a rocker be bad even though visually nothing looks wrong?