Hey folks, what a great site. Been pulling my hair out on the rebuild on this 74 Jeep J-20. Should have found this place A LONG Time ago.
Anywho, finished a rebuild on the 401 and now I'm having some oil pressure issues.
The symptoms are:
Truck starts fine. Mechanical gauge reads 40 to 60 psi. Once it warms up, the psi drops to around 20. But if you rev it up, it does hop up to 60 or so.
After the trip to work (about 10 miles give or take), the psi hovers around 20, and shoots up when you step on the gas. But when you come to a stop, at idle the pressure drops to about 5. Put it in neutral and rev it up, and it won't climb past 25 or 30.
Running straigt 30W oil.