Well, the oxidized '88 has been leaving quite a puddle wherever it's parked lately. It seems to be coming from the vicinity of the oil filter housing, as the puddle concentrates under that area. I thought it might be the pressure sender, but after a cleaning with engine-brite it shows no signs of a leak there.

Any common causes of leaks in this area? I plan on cleaning from the underside to see whether it might be the pan gasket, although the leak seems to be related to pressure since it stops dripping after a while when the truck is sitting. Could the oil pump be causing the trouble? I seem to recall it's in the same area under the timing cover.

Thanks for any insight.

HEY ADRIAN,, IT COULD BE THE CAM SEAL OR THE CRANK SEAL AND THE OIL PUMP SEAL OR ALL OF THEM , AT HI MILAGE THIS IS NOT AT ALL UNCOMMON,,JERRY

you know, i just replaced the cam & crank seals when i replaced the timing belt (this past spring). I didn't even think to replace the oil pump seal. i guess i should take another look under the timing cover.

I found mine to be the pressure switch, but it only leaked when I revved the motor. It actually was squirting pretty bad when I revved it <img src="/forums/images/graemlins/zombie.gif" alt="" />