1990 Jaguar XJ6 6 cyl Two Wheel Drive Automatic 94000 miles
On measuring the valve clearances due to noisy
lifter sound, I obtained readings of 0.012 to 0.014
on the intake side.
On the exhaust side the readings ranged from 0.012
to 0.026. I can see that these readings(0.026)
are excessive. My question is What caused the
clearance to grow from original settings (0.012-0.014). I would estimate that it could be cam bearings since the engine runs smooth but slightly noisy after a small amount of time. Startup has
more noise in area of larger readings which dissipates a small amount after oil reaches that area.
Can you elaborate on what might have caused the problem.? Shim deteriation? Bearing wear?Cam change. I plan on romoving the lifters in that area to check for damage etc.
Any info would be greatly appreciated
Thanks, Ron rdumaresq@cablenet. Ca
Wednesday, November 12th, 2008 AT 10:02 AM