Engine Oil Leak From Intake Manifold Gasket on Buick Regal

The intake manifold gasket can develop external engine oil leaks. The intake manifold will need to be removed and the gaskets replaced to correct this issue.

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Average mileage: 103,250 (71,000–145,000)
Engines affected: 3.1L V6, 3.8L V6
6 model years affected: 1990, 1991, 1992, 1993, more1994, 1995
11 people reported this problem
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problem details
1992 Buick Regal - 3.8L V6 71,000 mi,
Oil mixing with coolant. Bad intake manifold gasket.
1995 Buick Regal - 3.1L V6 82,000 mi,
This is also time to install new injector seals. Check for a coolant airlock via "coolant line valve, (same size as a tire valve)" after evac. , otherwise chance heat damage to heads . Use engine oil flush, siliconed areas have to be clean. Do a second oilchange a week later, three years later, change out your expired acidic gasket eating coolant .
1991 Buick Regal - 3.8L V6 115,000 mi,
Rough idiling and running. Oil in coolant. Smoking.
1994 Buick Regal - 3.8L V6 145,000 mi,
got my oil change a few weeks ago and was told i need a new intake manifold gasket, because oil is leaking into my coolant