I recently purchased a 1978 Ford F150 4x4 that was losing oil pressure
after about 10 minutes. Today I pulled the pan while it was still in
the vehicle, replaced the oil pump with a new one & replaced the .030
over rod bearings (while I had the pan off), checked the pickup tube
which I have heard is typically the culprit, started her up and was
pretty happy with it all. took it for a 10 minute drive, got home, &
watched the oil pressure gauge drop to "0". *&$#!
So, I can rule out the oil pump. The pressure is really dropping off
quickly, almost like the oil pump stopped pumping (wondering if the
distributer part that drives the pump could be slipping somehow).
Could be a cam bearing or something like that dumping out the oil,
it's just wierd that it's got REALLY GOOD oil pressure & then nothing.
If I remember correctly when I drove it home after I purchased it, the
oil pressure dropped off like described above & then after a short
time it came back on just as quickly. It's not the pickup tube either.
clean as a bell. mains looked OK. top end is just a wee bit noisy (not
bad at all) probably due to the prev owner running it in this
condition. Any ideas as to what might be causing this?
Thanks for any ideas,
mike ( email@example.com