Intake Manifold Gasket May Leak Coolant or Engine Oil on Pontiac Grand Am

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: 118,404 (10,000–316,000)
Engines affected: 2.2L 4 Cylinder, 2.3L 4 Cylinder, 2.4L 4 Cylinder, 2.5L 4 Cylinder, 3.1L V6, 3.4L V6, 4 Cylinder, V6
13 model years affected: 1990, 1994, 1995, 1996, more1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
143 people reported this problem
Viewing 1 - 20 of 67 comments
It keeps not wanting to start and its leaking oil onto my engine, the antifreeze keeps disappearing when i fill it up. and it over heats and shuts off while im driving.
noticed coolant on gound. kept adding coolant, sometimes twice a day. looked over engine compartment and saw puddle of coolent by manifold. clean area up, started car and found leak. Needs gaskets replaced. I called a repair facility was quoted between $1200.00 to $1800.00 to fix. Has Pontiac acknowledged this problem?
I had the Low Coolant light come on. Took it into the dealer who said I need new Header Gaskets. I am assuming I need Lower Intake Manifold gaskets as well.

I've been reading that is a common problem with GM V6 engines as the DexCool coolant degrades the plastic gaskets.


This is apparently a known GM problem. There was a class action lawsuit that was settled in 2008 on this issue. However, GM should do a recall on this issue as it is huge. I will never buy another GM car or American car for that matter.
Winter came, heater started blowing cold at idle but warmed when driving till fluid got low.
engine started running rough looks like oil is leaking onto spak plugs
2001 grand am , I found a huge puddle of oil under my car this morning. guess the intake gaskets have failed? put my car up on ramps- the oil has spread to my exhaust and cat-converter...Help
I have had to replace my intake manifold gasket three times now, three years now. This car has been nothing but trouble since I got it.
car was leaking coolant, had to have intake gasket replaced. Leaked coolant again, had to have freezeplug replaced. continued to leak, was told the head gasket was blown. been driving it for about 2 years on blown head gasket.
0verheats, leaks antifreeze, cost $860 to repair
Intake manifold was leaking coolant, the fix was upwards of $1000. decided to trade the car in instead.
Leaks colant while standing still
It runs hot fast and leaks under the engine
leak cooler doing my car overheat and damaged seal and gasket from the engine.
leaking radiator fluid into oil pan
Oil in the over flow tank
Car over heated while driving. Had a friend look at it and said this was a common problem. Has has not been fixed yet.
heads up stay away from 2.2 4cylinder engines
i have a s10 at 81000 cost 1800.00 for new head /gasket .
the mechanic told me the heads are throw away heads /now intake
gasket is bad i was told a1000.oo again less than 30.ooo miles / and do it all over /
stay away from chevy junk have had 2chevy s both were junk ps i take very good care of my vehicles no car track
i owned 5 buicks one i drove for 15 years 73 boat tail. no chevy
Intake manifold gaskets leaking
Leaking anti freeze and gas leaking from hose on top of engine
ticking noise and sounds like a motorboat and was told awhile ago that I need to fix the gaskets and now I think it is leaking oil