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1999 Pontiac Grand Prix: engine overheating

15 of the 412 complaints about the 1999 Pontiac Grand Prix describe engine overheating.

owner complaints
15
of this car's complaints
4%
typical mileage
79,500
recalls
3
Is there a fix? There are 3 recalls and 19 service bulletins for this area of the car. See below

Engine overheating by model year

What owners say

Filed Sep 29, 2009 · Engine · MI

I purchased this vehicle used about three months ago and last week my daughter was driving the car when it overheated and damaged my entire motor I took it to a auto place to have it looked at and they informed me that the car overheated causing the motor to lock up. This was due to the recall that every number I called that had the recall number 09047. Which is a engine and engine cooling.

Filed Jul 22, 2009 · Electrical, Engine · 1 miles · IL

Car over heats in stalled traffic. I have reviewed the overheating and car fire complaints in the "defects data base" and believe the main problem has not been identified: 'the computer will not call for full fan power' unless the A/C iis running.. Driving the car with the windows down on a warm day in stalled traffic, will raise the engine temperature as the cooling fans are both running in slow speed and will not go to the "high cool mode". But, turning the A/C on will speed up the fans to high and cool the engine. The computer should recognize the need for additional cooling with out the A/C having to be turned on. The increased engine heat due to this 'cooling system logic failure' will contribute to the oil leaks and engine fires that have already been reported to this agency. My vehicle, the radiator, fans, relays are all working as designed, and there are no diagnostic codes. Thus I am advising that this is a defect in logic with regard to controlling the high speed function of the radiator cooling fans. Having installed a new radiator recently and resealed the valve cover pans, I remain convinced that the problem is with the 'cooling circuit logic".

Filed Sep 4, 2008 · Engine · 94,370 miles · GA · fire

I brought the car brand new . I had no problems with my car except my check engine light came on. I had an ase certified mechanic check the car. He checked over my car and everything was fine. He used a computer. And the code came back clogged catalytic converter. I called gm twice and they said that my car was not under a recall I saw. I never got a recall letter. Another mechanic used a computer and laser light and it came back again clogged catalytic converter. The catalytic converter was replaced. After that I went to a gas station and got gas. Started my car up and it didn't want to start. After 3 times it started. Then I noticed that the temperature shot to 260 degrees. Engine overheated for the first time since I had the car. I parked the car in a grocery store parking lot and let the engine cool for about 2 hours before driving home. In less then 1 mile the engine overheated again. Finally made it to the house. Pulled into garage. Then black smoke started coming from under the hood. I turned the car off and it really started smoking and popping. I got scared and put the car in neutral and let the car roll out the garage. Black smoke was coming from under the hood and I turned the car off. It was popping, cracking and smoking. It took a while for the smoke to clear. The next day an ase certified mechanic came by the house and checked the car and said the engine burned and was seized. My engine never overheated before this.

Filed Oct 3, 2007 · Engine · 121,099 miles · GA

Tl*the contact owns a 1999 pontiac grand prix. While driving 20 MPH, the vehicle shut off. The contact stated that the vehicle would overheat and the engine remained running when the air conditioner was activated. The failure hinders the wheels on the vehicle from turning properly while driving. When the vehicle shuts off, it usually takes at least eight hours for it to restart. She stated that the vehicle was also leaking engine coolant. The vehicle has been taken to several mechanics and the radiator has been flushed and the water pump, thermostat, and relay switch have been replaced. The most recent assessment was that the intake gasket was faulty and needed to be replaced. The powertrain was unknown. The current mileage was 128,000 and failure mileage was 121,099.

Filed Aug 28, 2006 · Electrical · 133,000 miles · AL · fire

Electrical fire in the dash of a 1999 pontiac grand prix. It appears to be caused by an overheated sensor indicator.

Filed Oct 2, 2004 · Engine · 79,500 miles · VT

Driving down interstate for approx 100 miles, engine temperature suddenly overheated. Son and wife immediately pulled over and shut motor off. They waited approx 30 minutes for engine to cool off. They tried to restart the engine, but it didn't sound right so they stopped. Had vehicle towed to the dealer in springfield, vt for repair. Informed on monday that engine intake manifold cracked causing loss of coolant. Car had approx 79500 miles on it. Vin # is [xxx] .*ak updated 07/24/2012 *js information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)

Filed Aug 9, 2004 · Engine · 80,104 miles · NC

Vehicle's intake manifold cracked and engine coolant leaked into the engine. *mr the upper intake manifold cracked and coolant leaked into the cylinders and seized the bearings. On another occasion the vehicle overheated. The consumer was told that the engine was damaged beyond repair. *sc

Filed Dec 8, 2003 · Engine · 41,000 miles · OH

Lower intake manifold gasket cracked resulting in coolant leak into engine. Repair cost over $700. Car only has 40,000 miles. Mechanic stated that this is a known defect in this engine and doesn't understand why gm has not issued a recall.

Filed Nov 14, 2003 · Engine · OH

Engine runs rough, loss of power, engine seizes up - this occurred approximately sept 2002. Initial diagnosis: blown head gasket or headers. Initial estimates to fix: approximately $4000-4500. Initial calls to pontiac/gm were fruitless. Result: replaced engine oct 2003 (approximately $3500 w/warranty). Incident occurs a second time approximately 3 weeks after new engine installed. Diagnosis: intake manifold coolant leak, broken piston rod. Calls to pontiac/gm fruitless once again. Result: awaiting another engine and manifold repairs. To make a long and arduous 14 months short - after a considerate number of calls to pontiac, I was eventually able to speak with a pontiac engineer (pe) who specializes in fuel and exhaust systems. Pe explained the cause of my problem, worse case scenario and the solution: the problem lies within the lower (aluminum) intake manifold. Within is a tube that houses the egr valve and carries exhaust gases. This tube was made relatively large and runs either through or close to the upper (plastic) intake manifold. Over time, the extremely high temperatures of these exhaust gases causes the upper manifold to melt and creates a coolant leak into the fuel system. As this leak increases in size, increased amounts of coolant make its way into the piston chambers. Eventually, compression is lost and the piston rods can either bend or break. Both the lower and upper manifolds need to be replaced. The lower has been redesigned with a smaller tube that houses the egr valve, therefore, it does not lie as close to the upper manifold. Pe even faxed me a copy of the official bulletin in referencing this problem for 1998 and older pontiacs. Recalls: 2000-2003 manifolds. What happened to the 99's? There were no design changes on the manifolds for the 98's, 99's and 00's. Most dealership mechanics won't know about this problem. Pontiac is aware of the initial design defect. Their official bulletins prove this. Why should the consumer have to pay for their design defect?

Filed Nov 5, 2003 · Engine · 66,246 miles · SD

The intake manifold was replaced a year ago and may have caused damage to the engine. *ak the rod bearings failed. The heat gauge was noticed warmer than usual and eventually overheated and shut off. Gm dealers agreed the cause was due to the failed plentum. *scc

Filed May 16, 2003 · Engine · MO

While driving 35 MPH the vehicle's plastic intake manifold overheated and dropped water inside the engine.

Filed Apr 11, 2003 · Engine · 69,048 miles · MI

Faulty plastic intake manifold/ gasket on a pontiac grand prix (1999) caused coolant leakage into oil and cylinders. Caused my car to quit on a busy highway (almost caused accident)

Service bulletins that may apply

Related recalls

Engine and engine cooling: exhaust system: manifold/header/muffler/tail pipeReported October 26, 2015 · 1,003,556 vehicles affected
What is wrong
General Motors LLC (GM) is recalling certain model year 1998-1999 Chevrolet Lumina and Oldsmobile Intrigue, 1997-2004 Buick Regal and Pontiac Grand Prix, 2000-2004 Chevrolet Impala, and 1998-2004 Chevrolet Monte Carlo vehicles. The affected vehicles were previously repaired under recalls 08V‑118, 09V‑116, and 15V‑201 to address the possibility that engine oil may drip onto the hot exhaust manifold.
Risk
Engine oil that drips onto the hot surface of the exhaust manifold may result in a fire.
Remedy
The remedy applied under recalls 08V‑118, 09V‑116, and 15V‑201 did not adequately remove the safety risk. Under the improved remedy, dealers will replace the engine’s front valve cover and gasket. Vehicles that are covered by recalls 08V‑118, 09V‑116, or 15V‑201 that have not yet received the original remedy will instead receive the improved remedy under the original recall number. The recall began on February 19, 2016. Owners may contact Chevrolet customer service at 1‑800‑222‑1020, Buick customer service at 1‑800‑521‑7300, Oldsmobile customer service at 1‑800‑442‑6537 and Pontiac customer service at 1‑800‑458‑8006. GM's number for this recall is 15757. Note: Until the improved remedy has been applied, owners are advised to park their vehicle outside since the fire risk exists even when the vehicle is unattended.

Recall number 15V701000 · Recall details

Engine and engine coolingReported April 8, 2009 · 1,497,516 vehicles affected
What is wrong
General motors is recalling 1,497,516 my 1997-2003 buick regal, my 1998-2003 chevrolet lumina, monte carlo and impala, my 1998-1999 oldsmobile intrigue, my 1997-2003 pontiac grand prix vehicles equipped with a 3.8l v6 naturally aspirated engine. Some of these vehicles have a condition in which drops of engine oil may be deposited on the exhaust manifold through hard braking.
Risk
If the manifold is hot enough and the oil runs below the heat shield, it may ignite into a small flame and may spread to the plastic spark plug wire channel and beyond increasing the risk of an engine compartment fire.
Remedy
Dealers will replace the engine’s front valve cover and front-valve-cover gasket with new parts of an improved design and remove the engine’s plastic cover and plastic oil-fill-tube extension, free of charge. The recall is expected to begin during may 2016. Owners may contact chevrolet at 1‑800‑630‑2438, oldsmobile at 1‑800‑630‑6537, and pontiac at 1‑800‑620‑7668 or http://www.pontiac.com or http:www.gmownercenter.com.

Recall number 09V116000 · Recall details

Engine and engine coolingReported March 12, 2008 · 207,542 vehicles affected
What is wrong
Gm is recalling 207,542 my 1997-2003 buick regal and pontiac grand prix vehicles equipped with a 3.8l supercharged v-6 engine. These vehicles have higher front rocker cover gasket temperatures, creating the potential for earlier degradation of the front rocker cover gasket and eventual oil seepage.
Risk
Certain underhood fires may be caused by drops of engine oil, from seepage or spillage, being deposited on the exhaust manifold through hard braking. If the manifold is hot enough and the oil runs below the heat shield, it may ignite into a small flame and, in some instances, the fire may spread to the plastic spark plug wire channel and beyond.
Remedy
Dealers will replace the engine’s front valve cover and front-valve-cover gasket with new parts of an improved design and remove the engine’s plastic cover and plastic oil-fill-tube extension, along with the 1-3-5 spark plug wire retainers, free of charge. The recall is expected to begin during may 2016. , free of charge. The recall is expected to begin during may 2016. Until the remedy is completed, gm strongly recommends that owners observe the following important precautions (1) that owners do not park their vehicle in a garage, car port, or other structure; (2) if owners notice a burning odor, they should have their dealer inspect the vehicle. The dealer will inspect the vehicle without charge; (3) use premium fuel (91 octane or higher) in the vehicle as recommended in the vehicle's owner manual. Owners may contact buick at 1‑866‑608‑8080 or pontiac at 1‑800‑620‑7668, or through their website at http://www.gmownercenter.com .

Recall number 08V118000 · Recall details

Questions about the 1999 Pontiac Grand Prix overheating

Is engine overheating a common problem on the 1999 Pontiac Grand Prix?

15 of 412 owner complaints about the 1999 Pontiac Grand Prix (4%) mention engine overheating. The model year with the most reports is 1999.

Is there a recall or service bulletin for this on the 1999 Pontiac Grand Prix?

There are 3 recalls and 19 service bulletins for the same area of the car. Check them below with your VIN.

Other symptoms on the 1999 Pontiac Grand Prix

Fire or smoke 99Stalling 24Engine failure 13Headlights 12Power steering loss 12Loss of power 9Misfire 9Power windows 6Airbag light 5Wipers 5

All model years of the Pontiac Grand Prix

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