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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8413
Experience:  I am ASE Master Truck Certified.
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I have a c-12 cat that has low oil pressure ,it has new

Customer Question

I have a c-12 cat that has low oil pressure ,it has new parts in it ,I have tried everything
Submitted: 10 months ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 10 months ago.

Thanks for asking your question. I will try and help you out.

Can you tell me all the parts you have replaced?

What psi doe the engine have?

Customer: replied 10 months ago.
The engine is a reman but we have replaced oil pump and filter base has manual gauge pulled valve covers and checked for leaks
Expert:  Cat Man replied 10 months ago.

Thanks for the information.

What psi oil pressure do you have at idle hot and high idle hot?

Customer: replied 10 months ago.
40 cold goes to 15 warm went to 70 briefly after new pump
Expert:  Cat Man replied 10 months ago.

Thanks for the information.

The good news is the oil pressure is within specs. The minimum oil pressure at idle is 10 psi. At high rpm the minimum is 40 psi. if its within specs it should be fine to run.

Please reply back if you need more help or have more questions. I am happy to assist.

Customer: replied 10 months ago.
Is there any thing I cound change to increase pressure I am going to run it till it gets hot to make sure it's stays in spec
Expert:  Cat Man replied 10 months ago.

Unfortunately not. I am sorry. I wish there was something that could be changed.

Let me know how you make out. If the pressure drops below spec. I would suspect either a piston cooking spray jet is knocked off. Or the engine has the wrong main or rod bearings.

Expert:  Cat Man replied 10 months ago.

Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.