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.
Intake Manifold Gasket May Leak Coolant or Engine Oil on Pontiac Montana
Average mileage: 134,000 (60,000–298,000)
Engines affected: 3.4L V6, 3.5L V6
35 people reported this problem
15 people shared problem details
2003 Pontiac Montana98,000Visitor
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
2005 Pontiac Montana- 3.5L V6111,000Visitor
Coolant is leaking from the lower intake gasket onto the ground.
2003 Pontiac Montana- 3.4L V662,000Visitor
Smell of hot antifreeze, coolant disapearing
2001 Pontiac Montana298,000Visitor
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?
1999 Pontiac Montana- 3.4L V6Visitor
I have water mixing with the oil but no leaking on the ground
2002 Pontiac Montana- 3.4L V675,000Visitor
Intake manifold gasket leaking coolant, had to replace gasket twice!!!!!
2002 Pontiac Montana- 3.4L V6140,000Visitor
intake leaking coolant
Coolant leak at intake manifold gasket. Replaced at GM dealer with new design gasket.
2000 Pontiac Montana143,000Visitor
But this is not the first time we've had to replace the intake manifold gasket.
2002 Pontiac MontanaVisitor
intake manifold gasget leaking
2004 Pontiac Montana130,000Visitor
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 V6Visitor
Had antifreeze and oil missed together had a technician fix it
leaking oil/transmission fluid. replace intake gasket $950.00
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...
MY BROTHER FIXED THE INTAKE MANIFOLD AND THE VAN STILL SEEMS TO BE LEAKING AT RANDOM TIMES, NOT...