Chillin with the top off.
I have a cj7 with a rebuilt 390 amc v8. Runs like a raped ape.. Ok, Now on to the problem.. It has 50# oil pressure at start up, when it warms up it has 5.. If I rev it above 1250rpm the oil pressure comes back to 15-20 lbs.. I changed from 10w/30 to 20w/50 and it helped a little.. I ordered a oil pump kit and am going to try that tomorrow.. The engine was rebuilt approx. 20,000 miles ago and does not smoke and runs great.. I saw recipts from rebuild and am floored what it could be.. Any ideas? Thankx