Engine/Transmission (1994 - 1998) 1998 oil pressure w

[SAndreasen]

What is minimum oil pressure on a 1998 12 valve ?

 

[crabman]

I am not sure what the FSM says the minimum oil pressure should be but this link, http://dodgeram.org/tech/dsl/Facts/96specs.html , says that the oil pump should flow 20GPM.
I do know that when I was dealing with my oil pressure switch problem, I put a mechanical oil pressure gauge in the cab. Engine oil pressure at idle: cold=85+, engine temp 180*=30-40+ and that is on a high mileage engine. The oil pressure was taken off the small outlet on top of oil filter bracket.

 

[Cummins12V98]

The gauges are prone to false read at low RPM's. Mine would drop to zero with engine hot coming to an idle. Geno's has updated pressure senders.

 

[SAndreasen]

cummins manual says ten psi ide 30 psi high idle

 

[JR]

Not sure if the oil pumps are different but mine is certainly higher than that. At operating temp I'm a solid 40psi at idle manual gauge)

 

[GAmes]

It isn't a difference in pumps, it is a difference in bearing clearances. The spec range is enough to drop the pressure when the clearances are at the higher side. I have also read, but can not confirm, that '98 and newer gauges are not much better than idiot lights. IOW, they don't really show the actual pressure.

 

[JR]

Actually, my dash gauge appears to be pretty consistent with my manual gauge from what I can tell. I can't say that its exact as there are only 2 numbers on the dash to go by and everything in between I have to guesstimate, but the numbers/lines the needle does come into contact with is in line with my manual.

Mine also might be an early enough model that it avoided the "smart" programming.:-laf

 

[SAndreasen]

This is in a dorf conversion with a electric oil psi gauge in the a pillar we are gonna put a manual gauge on

 

[GAmes]

From what I can determine, the oil port on top of my filter housing isn't restricted by the regulator that is in the engine oil galleys. I have an Isspro EV2 sensor mounted there. My oil pressure from that port will peg the 100 psi gauge when cold with a little throttle. When at operating temps it will still go to 80+, even though my stock gauge is in the normal range in both instances. I do get the normal higher pressure on the stock gauge when cold. I have another EV2 sensor for fuel pressure. Both are wired to a triple pole, double throw toggle so I can select which I want to monitor.