donald
I have a 360 dont know what year or what it came out of. my oil pressure when cold is about 60 pounds but when operating temp she sits about 20 pounds at idle and 25-30 pounds at 2000-2500 rpm. but if i get on it the oil pressure spikes up. i changed the oil recently putting 10w30 in it. is this normal or is there something wrong?
ironman_gq
pretty standard condition and I would consider it normal. the oil pump housing is aluminum but the gears are steel so they expand at different rates which causes the clearances to open up and pressure to drop
360CJ5
From what I've read between here and jeepforum that's standard.
I read that 10psi per 1000RPM is a good approximation. 20psi at idle is good.
jeepsr4ever
it should be about 20-40psi at an idle. New motors with new oil pumps run about 34-45psi hot at an idle. When you tap the gas you should be jumping about 15-20 psi per 100rpm with a maximum of 65-70psi (That is where the spring is set if its a stock red spring). AMC uses a long gear that has a tremendous amount of suction however with that suction comes the higher pressure and higher flow. You will see a big loss in pressure as your viscosity drops with heat and your oil pump expands slightly. Since it is cast 356 the timing covers expand pretty close to their powdered steel cast gear counterparts but not close enough not to notice a drop in pressure.
fifesjeep
jeepsr4ever wroteit should be about 20-40psi at an idle. New motors with new oil pumps run about 34-45psi hot at an idle. When you tap the gas you should be jumping about 15-20 psi per 100rpm with a maximum of 65-70psi (That is where the spring is set if its a stock red spring). AMC uses a long gear that has a tremendous amount of suction however with that suction comes the higher pressure and higher flow. You will see a big loss in pressure as your viscosity drops with heat and your oil pump expands slightly. Since it is cast 356 the timing covers expand pretty close to their powdered steel cast gear counterparts but not close enough not to notice a drop in pressure.
=D> I'm with that...
