Recently replaced the head gasket on my son's 89 2.3 quad 4. The car now
runs great and doesn't overheat, however I have a somewhat high pitch wine
or twittering sound that I'm not able to positively locate its origin. I've
gone over every part the engine as well as the transmission with the old
screwdriver to ear trick but can't locate its source. The sound appears to
be the loudest near the rear of the intake cam box. I thought maybe that oil
wasn't getting to the cam box so I took it off and opened it up but didn't
see any scoring on the housing, camshaft or lifters that would suggest a oil
problem. I check the oil pressure with a manual gauge on the exhaust cam box
and have good steady oil pressure there. Might be a main or connecting rod
bearing but the engine doesn't knock and have good steady oil pressure
approximately 60 psi cold and 40 psi hot. I drained the oil and didn't see
any mental particles. When I replaced the head gasket I also had to replace
the cylinder head as the old one was warped rather badly. I originally
thought that since the cylinder head was so badly warped that maybe the cam
box was warped as well, but that wasn't the case. I might add that it's
neither the power steering pump nor the serpentine belt tensioner. Nor do I
believe it's coming from the timing chain or water pump area. Not sure what
to do next either tear down the bottom end and actually check the bearings
or try another cam box. Can anybody offer any advice here? The car runs
great has good compression, good oil pressure and sounds like a frigging
bird - help!!!!!!



Thanks