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. Running the engine with a coolant/oil mix may result in engine damage. Replacing the intake manifold gasket should correct this issue.
Intake Manifold Gasket May Leak Coolant or Engine Oil on GMC 3500 Pickup
Average mileage: 140,853 (102,560–202,000)
Engines affected: 5.7L V8, Gasoline
14 people reported this problem
3 people shared problem details
1994 GMC 3500 Pickup- 5.7L V8202,000Visitor
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leaking coolant from intake manifold
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