Chevrolet Express 1500
Report: Intake Manifold Gaskets May Leak Coolant or Engine Oil
Chevrolet Express 1500 Problem
Engines Affected: 5.0L V8, 5.7L V8, Gasoline
Average Mileage: 98,125 mi (50,000 mi - 145,000 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.
Visitor, 2000 Chevrolet Express 1500, 5.7L V8, 75,000 mi
Upper intake manifold gasket leaks. I had a cracked radiator which I replaced but the leak moved to the back of the engine block. Found out that the gaskets are made of plastic and possible corrode due to the antifreeze chemicals. It is a huge job to replace. My mechanic suggested trying the radiator sealing tabs first to see if it would fix the problem. It did. I talked to another buddy of mine who is a service technician and he believed that even brand new, they put those tabs in... faulty design!!!
Visitor, 2002 Chevrolet Express 1500, 5.0L V8, 68,000 mi
Noticed a smell of Antifreeze and thought the lower radiator hose was bad. Took it into the repair shop and after some searching they found the Gasket to the INtake Manifold was leaking. With this many reports, there should be a recall.
Visitor, 1999 Chevrolet Express 1500, 5.7L V8, 50,000 mi
Had a substantial antifreeze leak (about a quart on the floor) attributed to a ruptured intake manifold gasket. Mechanic said that these failures were not uncommon but that they usually occurred around 100K miles. Installed a steel gasket with an insert. No further problems since 2005.
Visitor, 1996 Chevrolet Express 1500, 93,000 mi
Mechanic noticed oil and antifreeze leakage. Replaced lower intake gasket.
Visitor, 2002 Chevrolet Express 1500, 5.7L V8, 117,000 mi
was repaired at shop
Visitor, 1997 Chevrolet Express 1500, 5.7L V8, 120,000 mi
Haven't fixed it yet, but its leaking antifreeze pretty bad.
Visitor, 1997 Chevrolet Express 1500
Blown intake gasket, fixed it myself, now it has two error codes and will not pass emissions, one is a random multiple misfire, the other is a cam code