Intake Manifold Gasket May Leak Coolant or Engine Oil on Chevrolet 1500 Pickup

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 141,754 (51,000–370,000)
Engines affected: 4.3L V6, 5.0L V8, 5.7L V8, Both Sides, Gasoline
10 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999
93 people reported this problem
Viewing 1 - 20 of 57 comments
whats the difference in a blown head gasket and a blown intake gasket
leaking antifreece in oil , havnt fixed yet.
leaking at manifold water coolant and passing on to exhaust causing smoke steam
anti freeze in oil, changed lower intake gaskets.
Oil getting in the cooling system but no water in the oil
Re-call on intake manifold, replaced at 30K miles & again at 60K miles. It is beginning to leak again at 110K miles.
Started smelling antifreeze around the truck, looks like it is pooling up around the base of the intake manifold area ........... My understanding is that the ORANGE DEXCOOL antifreeze is eating up the factory installed intake manifold gaskets. How could GENERAL MOTORS get away with this kind of issue ? The same problem on almost all GM cars and trucks that use DEXCOOL coolant.
coolant in oil wont pressureize..
leaking plastic gasket why would they us plastic where heat would build and ruin plastic integrety come on chevy
Blown intake manifold gasket
oil level increasing and pressure dropping
intake manifold gasket had to be replaced
coolant leaking from intake manifold
Started using water and knocking.very expensive to fix.
This is the second time, since I bought the truck new, that I've had to replace the intake manifold gaskets due to coolant leakage. The good news is that Fel-Pro has realized that their manifold gaskets suck and redesigned them. No more plastic with silicone sealing material. Hoping that they fixed the problem that the Chevy engineers created. Maybe they'll come out with a non-plastic distributor next. We can only hope.
It was losing coolant on the back side of the motor driver side gasket gets brittle between head manifold must be bad gasket design. pulled motor apart ordered order new style of gasket put back together replaced spider injector with new style spider injector truck runs good as new
Chevy you suck. Your cars and trucks are crap. Not what they used to be. I think you guys are designing them to fail.
Coolant loss on corners of lower manifold. Felpro gasket kit has upgraded material. Once at 51 k and again at 128,000
Currently contemplating replacing the engine w/ a 5.7. But my problem started much like everyone else's.
I started having a coolant leak that did not seem to be coming from the radiator or water pump. After a few weeks of adding coolant it finally just stopped starting. It would turn over all day long just wouldn't start. I thought it was a fuel pump but the mechanic finally told me I have water in my oil. Saw this issue on line and the light bulb turned on. A plastic gasket!! REALLY.... sad.