1999 Pontiac Montana: engine overheating

Filed Jun 4, 2012 · Engine · 168,000 miles · PA

It seems that the this particular make and model has known problems with the cooling system. On a family trip to virginia the car started to overheat and I stopped the vehicle. When parked red fluid was visible under the car and upon testing was found out to be coolant leak. Car was towed to pa and mechanic reported loss and replacement of radiator/hoses and lower intake manifold (gasket) a labor intensive work costing about 1700 to fix all the issue with this over heating.

Filed Oct 26, 2007 · Engine · 121,000 miles · VA

Tl*the contact owns a 1999 pontiac montana. While driving approximately 40 MPH, the vehicle began to overheat. There were no warning lights illuminated. The vehicle was towed to the dealer and they replaced the head gasket. The dealer stated that coolant leaked into the engine. The contact was responsible for the repairs, which totaled $1,800. One week after a routine maintenance repair, the mechanic stated that the vehicle was operating normally; however, the failure recurred. The mechanic also stated that this type of failure should not have recurred. The contact mailed a complaint to the company and has owned the vehicle for two years. The approximate failure mileage was 121,000 and current mileage was 131,000.

Filed Mar 13, 2007 · Engine · CA

Driving the van I noticed the vehicle started to over heat. I turned it off and waited 1 hour for it to cool down. Started it up again after filling the radiator, with the engine running I made sure the coolant was at the correct level. Within 5 min the car overheated again and this time it died before I could turn it off. I have been told it would be best to replace the engine at 4100.00 for that. I searched the internet and found out there are many other van owners with the same problem. They used a rubber seal without steel so that it coolant leaks into the engine and mixes with the oil, and dries out the camshaft and then it breaks. In canada there is already a class action lawsuit for this reason. They (manufacture) know there is a problem but wont say that it is there fault. I am also looking to find someone to take the case as I currently have a lswn ornament due to I don't have the 4100 to replace the engine.

Filed May 24, 2006 · Engine · 75,000 miles · MI

Coolant leak and gasket failure on a 1999 pontiac montana 3.4 l engine. I have had to replace the water intake gaskets twice on this m.v. They fail approx. Every 80,000 miles.

Filed Apr 27, 2006 · Engine · NJ

Failure of engine in 1999 pontiac montana at 101,000 miles due to leaky head gasket causing engine to overheat. This was after repairs for gasoline leak in engine due to failure of intake manifold gasket. All maintenance was done as per manufacturer's recommendations at dealership of purchase.

Filed Jan 31, 2005 · Electrical, Engine · 85 miles · MO

We have only had our van a year. We have had problems since we got it. One thing after another. First coolant leaking, electrial problems, intake gasket leaking. Replaced 11/05. Motor failed 1/05. Door mailfunction.

Filed Jan 21, 2005 · Engine · 70,000 miles · MN

The consumer states the intake manifold has malfunctioned. As a result the coolant leaks into the oil and the consumer is now concerned that the engine could fail. The cause has yet to be determined. Please provide additional information.

Filed Aug 27, 2004 · Engine · 131,998 miles · SC

Vehicle overheated on highway- with kids in car en route to family outing.

Filed Aug 7, 2003 · Engine · 70,030 miles · PA

While driving 65 MPH the intake manifold gasket failed and allowed coolant to mix with the engine oil. This caused the engine to overheat and shut down. The consumer found out that the manufacturer was aware of the problem and redesigned the gasket. Chevrolet owners with 3.8l engines were notified of the potential failure, but owner of gm vehicles with 3.1l and 3.4l engines were not contacted. *ak *ph

Filed Aug 5, 2003 · Engine · 76,005 miles · NY

My 1999 pontiac montana overheated. There were no signs other than my wife mentioning a funny smell. Had to replace both intake manifold gaskets and have the cooling system flushed. He claimed dex-cool causes this problem.

Filed May 30, 2003 · Engine · 58,000 miles · PA

1999 potiac montana - manifold failure, coolant leak. A costly and apprantly frequent problem.

Filed Feb 4, 2003 · Engine · 60,000 miles · NY

Vehcile is losing coolant discovered a bad iontake gasket. Repairs totalled $800 by local delaership. Rampant problem with this engine