Oil Pump Drive O-Ring May Leak Oil on Chevrolet Lumina

An engine oil leak may develop from the oil pump drive O-ring. This can often be confused with an intake manifold gasket leak. Careful inspection is required to determine the exact cause of the leak. Replacement of the failed 0-ring will commonly correct this concern.

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Average mileage: 123,500 (86,000–150,000)
Engines affected: 3.1L V6, 3.4L V6
7 model years affected: 1991, 1992, 1993, 1994, more1995, 1996, 1997
11 people reported this problem
2 people shared problem details
1993 Chevrolet Lumina- 3.1L V686,000
Thought at first it was the intake end gasket but actually it was the oil pump drive o-ring. Was able to pull up the drive shaft enough to clean and get some ultra copper gasket maker on the bottom of the shoulder of the shaft.
1995 Chevrolet Lumina- 3.1L V6150,000
oil leaking from the o ring
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