Engine Pumps Oil

We listed possible causes of the problem engine pumps oil:

1. Piston rings poor fit in piston grooves
2. Piston rings poor fit in cylinder
3. Broken piston rings
4. Scored cylinder walls
5. Excessive piston clearance
6. Excessive oil pressure
7. Thin oil
8. Improper grade of oil
9. Excessive bearing clearance
10. Faulty scavenger pump

Truck resource center for engine faults.

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