Oh guess I was watching a vidio for a later engine so I have no collasped hydraulic lifter so do I have solid lifters in my 617? Just trying to figure out what is causeing my noise from my valve area? There are spings on top is this this what returns the valve to closed position after it is open? Will still try to run it with valve cover off to pinpoint noise better Then button it back up and hope the marvel oil will clean out and lube whatever is causing the tapping noise. Forgive me as I have never worked on the internals of these 617 motors.