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.
Car Problem Reports
Oldsmobile Cutlass Supreme Intake Manifold Gaskets May Leak Coolant or Engine Oil
Oldsmobile Cutlass Supreme Problem
Engines Affected: 3.1L V6, 3.4L V6
Average Mileage: 129,929 mi (119,000 mi - 135,789 mi)
Visitor, 1995 Oldsmobile Cutlass Supreme, 3.1L V6, 135,789 mi
Its also a good time to replace head gaskets at the same time. Its only a few more bolts to take off.
Visitor, 1995 Oldsmobile Cutlass Supreme, 3.1L V6, 119,000 mi
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.