Intake Manifold Gasket May Leak Coolant or Engine Oil on Oldsmobile Alero

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.

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Average mileage: 100,185 (40,000–180,000)
Engines affected: 2.4L 4 Cylinder, 3.4L V6
6 model years affected: 1999, 2000, 2001, 2002, more2003, 2004
35 people reported this problem
15 people shared problem details
2000 Oldsmobile Alero- 3.4L V688,000
Nothing seems different about the way the Alero runs, but when I took it to the dealer for unrelated repairs, they discovered that the intake manafold gasket was leaking oil. They said that it would not necessarily create a puddle, but rather would stream along the bottom of the car as it is driven. So far the coolant has not mixed. Watch out for wheel issues (control arm, brakes) with this model.
2000 Oldsmobile Alero- 3.4L V6171,180
I have a 2000 Oldsmobile Alero that leaks coolant. I was told that it was the Water Pump Hoses which I just replaced them so its not that. Then they said it could be the Harmonic Balancer, but I read that couldn't leak. Then they said I could be the Intake Gasket Thermostat. What is wrong with my car...... Source Tireman
2001 Oldsmobile Alero- 3.4L V6120,000
bought the car had 116,000 miles. intake gasket repaired at shop at 115,999. now has 20,000 miles out again.
2001 Oldsmobile Alero- 3.4L V6130,000
2000 Oldsmobile Alero- 3.4L V640,000
coolant & oil were leaking from engine compartment. Seals & gaskets had to be replaced. Cooling system flushed & oil& filter changed. ok since.
2001 Oldsmobile Alero- 3.4L V6
leaked onto starter and had to replace
2003 Oldsmobile Alero- 3.4L V675,000
Intact manifold gasket failed
I was told it could the intake valve but there's no guarantee that would fix the problem. Or I could get a new/rebuilt engine.
1999 Oldsmobile Alero- 2.4L 4 Cylinder88,300
well I have to refill my coolant every couple months or until my sensor light comes on. Right where the transmission fluid compartment is , is where you find coolent liquid on the outside not that much , pin hole maybe. I ran my car for the past couple days alot traveling due to a death in the family and my 3rd gear acted up as in I could not get her to shift into 3rd or take her any faster than 35 m/hr. Im really hoping the transmission isnt bad. Im really strapped for cash no credit and its my only vehicle...3rd owner and ever since I got her problems had results. Only a little over 88k miles
2002 Oldsmobile Alero- 3.4L V6
my son put stop leak in vehicle, now had took it garage to get fix but the is still running hot. so had i recfily this had intake manifold fix. so question to u how do i get the stop leak a my heat core
2001 Oldsmobile Alero- 2.4L 4 Cylinder180,000
my car is leaking oil pretty bad also i need guidience on how to repair myself
2002 Oldsmobile Alero- 3.4L V6100,000
Radiator was leaking ( well at least i thought it was) and when I took it in, I had a crusty orange fluid stuck to the side of my engine. I guess I have an external manifold gasket leak and it is leaking coolant. Said its going to cost me $2,000. I've already rebuilt the transmission on this car, new tires, new breaks, new everything. Now this.
2001 Oldsmobile Alero- 3.4L V652,000
gaskets replaced
2001 Oldsmobile Alero- 3.4L V6143,000
I took my car in because I heard a squeaking sound and thought it was a belt. it was the water pump anyway they told me about the manifold leak and it would cost $1000. I was very sick to my stomach because we had this problem fixed 2 or 3 years ago.
2002 Oldsmobile Alero- 3.4L V646,234
leaking intake gasket driver side
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