Low Oil Pressure

[tree98]

(10-29-2026 )Carl Riederer Wrote:  This truck had issues with the factory crank. There is an issue somewhere.

There are different sizes of cummins crank bearings, maybe you have a journal or 2 that are oversized and somehow it got overlooked at the factory and the wrong bearings were installed?? The only way to know is to take it apart and measure everything.

If it has an aftermarket head too it could be hemorrhaging oil badly from one or all the cam bearings. Part of the problem with using all this aftermarket stuff is that now you don't know where to start, none of those parts can be trusted.