car has right bank cyl head area tapping noise.oil pressure is 12 psi when warm,removed right bank valve cover and head is very clean,no sludge.started car and observed valve movements and looks like all valves and springs are operating properly & nothing is loose.It didn't seem like a lot of oil was coming out of lifters,but I don't know how much should be spitting out of them anyway. both cyl heads were replaced about 1,000 miles ago, due to overheat.car was running fine,until out of the blue the tapping noise appeared.No signs of any Lean Misfire,just the noise.
Oct 9, 2009 at 11:53 AM