ISX oil pressure problems

[Rawze]

(09-29-2023 )SquareOne Wrote:  Whats the history on this engine? Ever rebuilt? Major repairs lately? What about mileage, engine type (i.e- CM871, CM2250, CM2350, CM2450), etc? We will need info before any suggestions can be provided.

Also, how long have you owned this setup? Do you have any prior knowledge on how the engine was treated before you ended up with it? What truck is it currently installed in?

Agree... What make model?.. some history, etc.

also, what is the oil pressures at idle, and at 1500RPM, after the engine warms up to its regulated temp of 185-F?>

.. and what you are describing sounds more like the oil pick-up tube cracked, or pickup tube o-ring failing, and it sucking air ... maybe a failing oil pump... or perhaps simply not enough oil in the engine? .. but that is just a guess.