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.
Intake Manifold Gasket May Leak Coolant or Engine Oil on Buick Regal
Average mileage: 113,338 (90,000–180,690)
Engines affected: 3.1L V6, 3.8L V6
9 people reported this problem
2 people shared problem details
1998 Buick Regal- 3.8L V6180,690Visitor
Check engine light came on and started flashing. Car ran rough. When shut off, wouldn't restart. Intake manifold gasket leak. Antifreeze in oil. Would have had to replace the intake manifold gasket, plenum, spark plugs, flush antifreeze system and change oil. Decided not to fix it, sent it to salvage yard.
2002 Buick Regal- 3.8L V690,000Visitor
Oil in radiator; antifreeze in oil.
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