11th Mar 2008, 11:06

I own a 97 Grand Am with a 3.1 V6 and I am continually have problems with my engine over heating and losing antifreeze. I have replaced the thermostat twice, the water pump, checked my fan, new head gaskets, new fan sensor switch and relay switch. The engine still continues to spit out antifreeze out of the over flow tank. Can anyone please help me???

20th Apr 2008, 15:47

I'm having just the opposite problem. My car doesn't seem to want to get very hot and put out any heat for the heater. I've tried bleeding the valve to the water pump and it works for a few miles but still not very well. What could that be?

3rd Jun 2008, 02:48

No heat may mean you have a bad heater core.

I have a '92 Grand Prix with over 160,000 with no over-heating issues (or any other issues really). Mine has the 3.1 that's more flat on top, so must be an issue in their newer 3.1 motor?

7th Aug 2008, 07:49

I also have a 1995 Grand Am. I was told that the over-heating is a design flaw on GM's part. The manifold is very close to the thermostats in these car's causing the thermostat to stick. So many people have had this problem I'm surprised there isn't a class action law suit out there somewhere.

11th Aug 2008, 10:51

Lots of problems few answers...

I also have an overheating problem like all the others. 95 grand am replaced the stat with no success. Will check the fan before I replace the pump.

26th Sep 2008, 23:48

Check the notorious leaky intake - seems to the problem solver - ignore the core!

29th Oct 2008, 11:48

OK my girlfriend is having very similar problems. She bought a 95 grand am with about 146k miles on it a little over three months ago. Over the past month or so its been over heating pretty constantly and we've had the water pump and I believe the thermostat replaced, the Radiator flushed and two hoses replaced. We've also had to replace the upper hose because it blew out. The mechanics that we took it to told us it was very hard to bleed the system of air completely.

The cooling fan sounds like it kicks on but I've not actually looked to make sure it is running.

And the heat works, or at least did right after we replaced the upper hose.

Any suggestions? I've tried to include everything that's been done to it.

A friend of mine suggested that it might be a cracked block...

29th Oct 2008, 17:25

You can thank Dex-cool coolant for your gumming up problems that are leading to your overheating, & that is VERY difficult to bleed the air out of these systems.



5th Dec 2008, 01:37

I have a '95 Grand Am Gt that I bought new. It has 140,000 miles on it. I've never had any problems with it over-heating. However, I did have to replace the heater core. The only other problem I've had is to replace the oil pressure sending unit twice. Hope someone will solve the overheating problem for you guys.

Jerry Hardin

Cameron, NC.

22nd Dec 2008, 12:22

I have a 1992 Pontiac Grand Prix LE with a 3.1 V6 engine. recently the heater hose split and began spewing coolant. I replaced the hose, but developed an air lock in the cooling system, which caused a) the car to overheat, and b) no heat from the heater. After adding coolant several times with the radiator cap off and the engine started, I finally got rid of the air lock, and have a normal operating temperature and plenty of heat. Remember to be careful working with a hot engine, not to remove the radiator cap until cool.

11th Jan 2009, 17:40

I recently bought a 95 Grand Am SE 4cyl. The people I bought the car from said they think the car is over heating because the water pump is going out. I also discovered that the cap on the reservoir is rated for 15 psi, and in the manual it says that you need one that is rated 18 psi. When I figured that out, I had noticed wet spots on and around the opening that the cap goes on. I am going to replace the cap cause it's a cheap fix if it works.

25th Jan 2009, 17:43

I own a 1995 Pontiac Grand Am GT and had all the same cooling system problems that everyone here has mentioned. If you want to repair the problem, prepare to spend a little money.

When I first purchased the car about six months ago, it ran hot. I replaced the radiator and the radiator hoses, and the problem went away for a while. The radiator went bad due to a neglected cooling system. After that the heater core started leaking. I bypassed the heater core since it was warm out, and put plain water back into the system and ran the car for a few month's until it started to get cold out. I replaced the heater core and put 50/50 premixed antifreeze back into the car. The car was using coolant at a slow rate, and the oil did not appear to have coolant in the oil.

The worst of the problems started when it started to get really cold out; it would start but not very well when cold. Once it was running it would run fine. I had a mechanic friend of mine scan the car when warm and no codes or errors would show. I then warmed the car and parked the car overnight in the garage and pulled the plugs and found antifreeze in the number two cylinder. I ordered the parts necessary to change the head gasket, which included the timing chain set, gasket set and water pump. I pulled the cylinder head and inspected the affected cylinder, and found a small hairline crack between the valves, which was causing cylinder pressure to push into the cooling system (most likely causing heater core failure and a leaking lower radiator hose and coolant leakage into the cylinder when cold).

I ordered a replacement casting and had my engine shop swap parts from the old head to the new head. I then put the car back together, refilled the fluids and got the car running.

I drove the car about 60 miles and noticed fluctuating oil pressure. I changed the oil again, which restored normal oil pressure. I have now got about 600 miles on the car since the repair with no problems and got 30 mpg on the highway.

I have made a lot of repairs to this vehicle since I have purchased it, but most were routine repairs that were never done by the previous owner. I would say that I have $2500 in parts and have done 90% of the work my self.

These cars have seemed to have gotten a bad rap, but if the car would have been maintained throughout its life, these repairs would not have all been done at the same time, and some of them not at all. Remember these cars are getting old, and you will have to turn a wrench on them once in a while to keep them running.

I am very pleased how the car is running now, but it was a lot of work to get it there.