Car Problem Reports

Chevrolet Express 3500 Intake Manifold Gaskets May Leak Coolant or Engine Oil

Chevrolet Express 3500 Problem
11 Reports
Me Too

Model Years Affected: 1996, 1997, 1998, 1999, 2000, 2001, 2002

Engines Affected: 5.7L V8, 7.4L V8, Gasoline

Average Mileage: 89,750 mi (70,000 mi - 120,000 mi)


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.

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