Oil Pump Drive O-ring May Leak Oil From Rear of Engine on Chevrolet Monte Carlo

An engine oil leak may develop from the rear of the engine. This is commonly caused by a failed oil pump drive o-ring seal. The leaking o-ring should be replaced to correct this concern.

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Average mileage: 117,919 (71,000–142,758)
Engines affected: 3.1L V6, 3.4L V6
11 model years affected: 1995, 1996, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2004, 2005
14 people reported this problem
2 people shared problem details
1996 Chevrolet Monte Carlo- 3.4L V6142,758
oil leak looks like rear main seal but i had 3.1 done this check at throttle look down round object with a fork with a bolt oil pump shalf o ring replace stop s leak plus 3.4 eng calls too remove head too fix theres a trick too fix shaft can be pulled up enough too clean and full area gasket maker fill i used whole tube fixed
My oil pump went out and threw a rod and blew the engine up at the same time.
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