Intake Manifold Gasket May Leak Coolant or Engine Oil on Buick Regal

The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Our technicians tell us that operating the engine  with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.

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Average mileage: 96,500 (90,000–116,000)
Engines affected: 3.1L V6, 3.8L V6
6 model years affected: 1994, 1995, 1996, 1997, more2001, 2002
8 people reported this problem
1 person shared problem details
2002 Buick Regal- 3.8L V690,000
Oil in radiator; antifreeze in oil.
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