I was looking at a 1988 F150 4x4 today with a 5.0 302 in it. The guy who owns it is a mechanic and said it has low oil pressure when cold. He tested it manualy with another gauge which still shows low oil pressure.
Now he wants to swap engines from another truck he has to fix the problem. The other engine is a 5.8.
What I'm wondering is if a engine swap is the best way or is there something else like a new oil pump that would solve it?
Yeah thatís how he was coming across but itís worth to get more than one opinion I think.
Always a good idea to get a 2nd opinion, or third lol. So...he's going to swap the engines then sell it to you? Is he charging you extra for this? How much is he asking for it if you don't mind saying?
Anyone else have an opinion? I was talking to him today and it seems I misunderstood with it having low oil pressure when cold. He said today that on start up when cold, the oil pressure is fine, but once it warms up it gets low.
He said its at about 30psi when cold on start. The oil looked low on the dipstick, maybe about a quart low.
Whats the psi when hot. The 302 is not a high oil psi motor. anything above 5 psi is in the green for a 302. I live in conway, SC I run 10w40 oil. I have 10 psi when the motor is hot, and on not days with stop and go traffic it might drop as low as 8 psi. Also I had a 87 f150 5.0 that only had 5 psi when idling. 5 psi and ^ is good.
And if you run thicker oil be sure to add some lucas oil stabilizer or the like. My truck has the death rattle and I'm just going to run it like this as long as I can, which I'm thinking can be a long time.