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 Oldsmobile Cutlass Supreme
Average mileage: 136,163 (75,000–300,000)
Engines affected: 3.1L V6, 3.4L V6
12 people reported this problem
1993 Oldsmobile Cutlass Supreme - 3.1L V6 101,000 mi, Visitor
Overheating. Oil gone from crank case. Found it in radiator.
1993 Oldsmobile Cutlass Supreme - 3.1L V6 300,000 mi, Visitor
This is vin. T motor
1996 Oldsmobile Cutlass Supreme - 3.1L V6 100,000 mi, Visitor
Oil had gotten into the radiator and I began to burn the engine coolant and oil cause the engine to steam/smoke. I flushed the radiator out and refilled it with new engine coolant but now my car is misfiring and idles/takes off very rough.
1997 Oldsmobile Cutlass Supreme - 3.4L V6 123,520 mi, Visitor
Identical issue- overheating, no water in overflow tank, caramel colored oil.
1995 Oldsmobile Cutlass Supreme - 3.1L V6 135,789 mi, Visitor
Its also a good time to replace head gaskets at the same time. Its only a few more bolts to take off.
1995 Oldsmobile Cutlass Supreme - 3.1L V6 119,000 mi, Visitor
Started overheating quickly withing just 3-5 minutes of driving. Noticed the peanut butter color substance in the oil from the coolant and oil mixing. Lower intake gaskets on the 3.1 are notorious for blowing out, replaced it, problem solved.