Oil Pressure drop

[Pd6cas2]

02 CM570
Oil pressure this new year morning drop from 17psi idle to 10 idle , also driving 63mph pressure was 38psi normally. Now 27 psi going 63 mph !
I just replaced main oil filter ‘ no change in pressure, I added a gallon oil and quart of gear lube.
Engine inframed 250k ago , new head, new oil pump !
No power lost or engine codes , truck runs excellent new turbo 2500 miles ago and oil lines to turbo.

[tree98]

Maybe your oil pump is getting weak.

[Unilevers]

spun cam bearing?

[Pd6cas2]

250k on Cummins oil pump , I will open the top end tomorrow!
Am I damaging engine by running this oil pressure!

[Pd6cas2]

(01-01-2020 )Unilevers Wrote:  spun cam bearing?

I don’t hear any new chattering noises from top end , Would I hear metal on metal noise?

[snailexpress]

(01-01-2020 )Pd6cas2 Wrote:  250k on Cummins oil pump , I will open the top end tomorrow!
Am I damaging engine by running this oil pressure!

To some point. If bearing spun crank or camshaft will be destroyed.

[Mattman]

Well you have lost 10psi so something is wrong. I would be scared to drive it like that if it were mine.

I would start by removing valve cover and see what you can see.

[Pd6cas2]

(01-01-2020 )Mattman Wrote:  Well you have lost 10psi so something is wrong. I would be scared to drive it like that if it were mine.

I would start by removing valve cover and see what you can see.

I will post pics of top end

[Nostalgic]

How old is your oil pressure sensor?