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b5demon, Dodge Technician
Category: Dodge
Satisfied Customers: 3726
Experience:  ASE and Chrysler master technician for over 17 years Sprinter and Viper specialist
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Cummins: ON my Cummins 5.9 ,1999 , i replaced one cracked

Customer Question

ON my Cummins 5.9 ,1999 , i replaced one cracked piston, all connecting rod bearings,rings, and injectors. I put everything back together , engine runs great , my only problem is the oil pressure is 50 lbs at idle and 100 wot cold .
Submitted: 1 year ago.
Category: Dodge
Expert:  b5demon replied 1 year ago.
Hi Welcome to Just Answer! Did you check the bearing clearances with plastic gage when you assembled the engine?
Customer: replied 1 year ago.
.002 clearance
Expert:  b5demon replied 1 year ago.
That is why the pressure is high that is fairly tight for the clearance
Customer: replied 1 year ago.
What is my option
Customer: replied 1 year ago.
If the bearings are causing the high pressure , should the pressure regulator valve open up and relieve the pressure
Expert:  b5demon replied 1 year ago.
the only way to fix it is to take the engine back apart the pressure regulator can only relieve so much pressure