Intake Manifold Gasket May Leak Coolant or Engine Oil on Pontiac Montana

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.

RepairPal Verified
Average mileage: 134,000 (60,000–298,000)
Engines affected: 3.4L V6, 3.5L V6
7 model years affected: 1999, 2000, 2001, 2002, more2003, 2004, 2005
33 people reported this problem
14 people shared problem details
2005 Pontiac Montana- 3.5L V6111,000
Coolant is leaking from the lower intake gasket onto the ground.
4 people like thisFlag inappropiate
2003 Pontiac Montana- 3.4L V662,000
Smell of hot antifreeze, coolant disapearing
4 people like thisFlag inappropiate
1999 Pontiac Montana- 3.4L V6
I have water mixing with the oil but no leaking on the ground
2 people like thisFlag inappropiate
2002 Pontiac Montana- 3.4L V675,000
Intake manifold gasket leaking coolant, had to replace gasket twice!!!!!
2 people like thisFlag inappropiate
Coolant leak at intake manifold gasket. Replaced at GM dealer with new design gasket.
2 people like thisFlag inappropiate
2002 Pontiac Montana- 3.4L V6140,000
intake leaking coolant
2 people like thisFlag inappropiate
2001 Pontiac Montana298,000
MY MONTANA IS STILL LEAKING AND MIXING WITH THE OIL ENGINE. IT'S OVER HEATING AND STOP AT ALL TIMES. AFTER 3KMs,IT'S WARM UP VERY HIGH. I LIVE IN OTTAWA, CANA AND I NEED A GARAGE TO FIX IT FOR. IS IT A RECALL FROM THE MANUFACTURE?
1 person likes thisFlag inappropiate
oil in radiator
1 person likes thisFlag inappropiate
Started leaking oil two weeks after a oil change. Took it to one shop they said nothing was wrong. Took it to another and for sure three hours later they found out it was an intake manifold. Are these things common
1 person likes thisFlag inappropiate
2000 Pontiac Montana143,000
But this is not the first time we've had to replace the intake manifold gasket.
intake manifold gasget leaking
2004 Pontiac Montana130,000
My oil stick showed very high level of oil in it. The color is off so it has to be leaking anti-freeze into the engine.
2003 Pontiac Montana- 3.4L V6
Had antifreeze and oil missed together had a technician fix it
leaking oil/transmission fluid. replace intake gasket $950.00
Related Items:
how do you replace the intake gaskets on a montana 2003
During oil changes the oil looks milky and the temperature gadge keeps running up. The tempera...
Replaced the radiator, water pump, and tstat. Didnt overheat for about an 30 min drive then on...

Related Content