ODD Cummins oil pressure

[Hammerhead]

(12-11-2016 )DKenworth Wrote:  Hey thanks, Yeah, I will buy oil pressure sensor and will see if that will fix problem. When pressure goes up engine runs fine same as at normal psi, i been doing aome research some ppl advise to change oil filter, well will see. Thanks

I did my first three oil changes prematurely when my truck was new, I always do to eliminate potential manufacturing, machining, and initial wear debris.
I had the oil filter plug on my '09 on the first oil change interval that I tried to run to full service, 12k miles. When the filter plugged, the oil pressure crashed, not spiked.
The pressure gauge/sending unit is post filter, not pre, therefore a plugged filter would deprive the engine of sufficient flow & pressure.
If your gauge is correct, and you are actually having pressure spikes, I'd investigate downstream of the sending unit. I would suspect an oil rifle blockage further downstream causing pressure buildup at/before the sensor. This would be above the piston cooling jets and upwards. My first suspect would be in the head. Particularly the rocker shafts or internal drillings, as this is the last part of pressurized flow with the smallest oil rifles and many turns and bends where soot deposits like to form.
If your gauge is correct, the simplest way to attempt to clean without physically dismantling engine components would be to use a high detergent content oil, such as Rotella, and several very short change intervals to have as clean as possible oil to help carry away the soot. I would suggest 3 or 4 3,000 mile oil changes. I agree with Rawze, and dislike switching oil brands, but for this special circumstance it may be advisable.
Also, make sure you are using the long oil filter, the 9000 not the 9070. A longer filter means more surface area, and less likely to plug.
Good luck, and provide feedback about what you find so we can all learn from it.