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 Chevrolet Express 3500
Average mileage: 89,750 (70,000–120,000)
Engines affected: 5.7L V8, 7.4L V8, Gasoline
11 people reported this problem
3 people shared problem details
2000 Chevrolet Express 3500- 7.4L V870,000Visitor
twice now. first time payed for repair but the valley gasket slipped out at one corner and seems that the lower was over torqued... I am doing my self this time. I am not sure if I should use any "RTV" or sealant whatever...
1997 Chevrolet Express 3500- 5.7L V8120,000Visitor
Leaking anti-freeze with smell, but no visible sign of leakage until gasket blew. Had to replace at 120,000 miles.
2002 Chevrolet Express 3500- 5.7L V885,000Visitor
smell engine coolant and notice its coming from intake manifold
has anybody had a problem with thw oil pressure gage? when driving it is fine until you stop or...
oil pressure guage keeps moving up and down and then stays at zero then moves back to where it...
runs rough at idle,black smoke at tailpipe.give gas rpm goes up no problem and runs fine.at idl...
What could be causing the new leak... Is there a "special" or better seal that can be used on a...
approximate complete cost to replace LH side exhaust manifold