Report: Oil Pump Drive O-Ring May Leak Oil
Chevrolet Lumina Problem
Engines Affected: 3.1L V6, 3.4L V6
Average Mileage: 125,333 mi (86,000 mi - 150,000 mi)
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.
Visitor, 1995 Chevrolet Lumina, 3.1L V6, 150,000 mi
oil leaking from the o ring
Visitor, 1993 Chevrolet Lumina, 3.1L V6, 86,000 mi
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.