Question about 1997 Pontiac Grand Prix

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My 1997 grand prix gtp has a leak

Water leaks inside the passenger side of the interior.

My engine runs hot when idling . I changed the thermostat but this did not help. My horse power has decreased.

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  • Richard Scordino May 11, 2010

    Sounds like a leaking heater core...don't run with low coolant or you will damage engine.

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  • 77 Answers

Is it water or coolant that leaks inside. Water will be clear, coolant will be yellowish-green or blue. If it is clear than it is just a rubber hose that is loose from the AC drain. Replace the hose and clamp. If it is coolant then you have a leaking heater core and would need to get it replaced.

Posted on May 12, 2009

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Posted on Jan 02, 2017

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1 Answer

2006 pontiac grand prix smells antifreeze in car


Is there coolant leaking inside the car? Check the floor under the passenger side dashboard. If the carpet is wet your heater core is leaking.

If the floor is dry check the coolant elbows going from the block into the automatic belt tensioner. That's inside the engine compartment. They are notorious for leaking. You may not be able to see the leak because it drips onto the block and evaporates. That's what the smell may be.

Search google images for "3800 series 3 coolant elbow" to see the part I am talking about.

The only way to find a coolant leak is to pressurize the cooling system. You can rent a coolant pressure tester from an auto supply store. Pressurize the system and look for leaks. You may have a leaking water pump.

The elbows can be purchased from the dealer. The water pump you can get from an auto supplier. Might as well change the thermostat while you are doing the other repair. Drain the cooling system and refill with fresh dex coolant.

Make sure you bleed all of the air out of the system or the car will overheat.

May 08, 2014 | 2006 Pontiac Grand Prix

1 Answer

1997 grand am is dripping coolant down passenger side of engine and running off a arms underneath the car. would this be from bad thermostat


The thermostat is an internal part so it can't leak like this. Usually leaks are hoses, radiators or water pumps. You need to narrow down where the leak is. Just turn the engine on and watch you will see where it is leaking from. Once you can narrow that down and describe it then it is easy to describe the fix ie replace a hose or just tighten a hose clamp.

Jan 16, 2013 | 1994 Pontiac Grand Am

1 Answer

Coolant leak 2006 pontiac grand prix


These engines like the 3.8 usually have a intake leaking problem. Also the have plastic elbows on the passengers side of intake that go to heater hoses can leak also. Is it a 3.8 liter engine in your car. And where abouts does the fluid look like its coming from.

Jun 16, 2012 | 2006 Pontiac Grand Prix

1 Answer

Why does my oil pressure sending unit leak oil on my 97 grand prix gtp 3.8 engine ?


Because its bad. I have unplugged some before, they have that silicon seal, and there would be oil inside the plug.
Just replace it.

Sep 14, 2011 | 1997 Pontiac Grand Prix

1 Answer

My 1997 Pontiac Grand Prix GTP has an oil leak located on the firewall side of the engine. It's a small leak (2-3 drops a day) but very messy on my concrete driveway. How can I fix it?


Try some motor honey. It can be bought at most part stores, advanced auto, autozone, ect. It worked for my 95 Grand Am when I had a leak in my oil pan gasket. Hope this helps

Jul 08, 2009 | 1997 Pontiac Grand Prix

2 Answers

97 grand prix gtp starts then immediatly dies


If you have a GTP these engines use a hi output fuel pump. they use a fuel pump resistor located under the battery tray (look up from under the car) This resistor lowers the voltage to the fuel fump when not in boost mode. because of its locatoin it is prone to corrosion. if you bypass the wires and the engine starts and stays running replace the resistor

May 13, 2009 | 1997 Pontiac Grand Prix

1 Answer

1. My grand prix gtp has problems with leaking on the passenger side. I cannot locate the leak. 2. My engine runs too hot when ideling. I changed the thermostat but this did not help. I need your assi


Make sure your cooling fans are coming on when the temp heats up. Are you talking about a leak inside the car or outside? Inside is usaully a drain tube for the A/C stopped up. Outside, look for a water pump or intake gasket.

May 12, 2009 | 1997 Pontiac Grand Prix

1 Answer

2003 and Prix GTP - Leaking Oid


It could be the Oil pressure sensor is bad and leaking oil, There know to go bad and will leak worst when driving as the oil pressure goes up.
Good luck and hope this helps.

May 06, 2009 | 2003 Pontiac Grand Prix

1 Answer

Dtknog@yahoo.com


Are you sure you put the thermostat in the right direction? The 195 degree copper bulb shold be on the bottom side. If it is a stock one.

Jan 26, 2009 | 2000 Pontiac Grand Prix

2 Answers

1997 grand prix gtp starter location


at rear bottom of engine, u must change it from the bottom. Make sure the battery is disconnected before u start work.

Jan 15, 2009 | 1997 Pontiac Grand Prix

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