Cm2250 oil pressure numbers???

[jimeneztrans84]

My truck idles at 15 psi when at opp temp and 35-40 psi when going down the road at 60mph. Does this sound ok? I believe a couple months back before summer it was idling at 20 psi @ idle. Is there something that might be going bad? I change oil every 12-13k

[Hammerhead]

Sounds like Atypical Cummins oil pressure. If you don't like it that low, I have a thread running where I just shimmed my pump to increase pressure some. I used to dream of 40, now I run 41 at 220* operating/cruising temps...

http://rawze.com/forums/showthread.php?tid=601&page=2

[jimeneztrans84]

My mechanic recommended oil pump and bearings to be swapped out... what do you guys think? He said it should be idling at 20-25 psi.

[Hammerhead]

A little more info please...
Engine model?
How many miles/hours on the bearings? How many miles/hours on the engine?
What brand, type, & grade of oil? (ie: Rotella, synthetic, 10W30)
At what mileage is the current oil at?
What rpm idle/oil pressure?
What rpm cruise/oil pressure?

I would probably try shimming the oil pump first as it is by far the least expensive route. Are you going to roll the bearings in yourself, or hire it out?

[jimeneztrans84]

2011 cm2250 450 with 501,000 miles. I bought it at 455,000. I always been using rotella 15w40. The hours I don't recall off the top of my head I think around 17,000 hours. @600 rpm idle it's at 15-16 psi and 1400 rpm it's at 35-40 psi. Current oil is at 6,000 miles. You think maybe clogged oil filter? Or just go ahead with pump and bearings?

[overshot]

THAT'S what my cm2250 runs at. with outside temps hitting 100+ that's about normal. i am going to shim my pump to get the pressure. also, my engine has about the same my miles as yours. but, i have a lot less hrs.
i think, SHIM THE PUMP 1S[/size]T.

[jimeneztrans84]

Yeah that's the outside temp where I'm at in california and Las Vegas 100+. You think it's the outside temp causing this? Not too long ago it was at 20 psi @ 600 rpm in March. Should I be worried?

[overshot]

(07-16-2016 )jimeneztrans84 Wrote:  Yeah that's the outside temp where I'm at in california and Las Vegas 100+. You think it's the outside temp causing this? Not too long ago it was at 20 psi @ 600 rpm in March. Should I be worried?

yes the outside temp effects it. especially between LA and Vegas. i would be and i am concerned with mine.
thats why i am going to shim my oil pump, just to make sure cam and rockers are getting oil.

[jimeneztrans84]

How long have you been with current psi?