Question about 2002 Pontiac Grand Prix

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Coolant leak Every couple weeks I get a "low coolant" light on. when I attempt to fill the coolant, it leaks out fo the bottom of the car. When I got my oil changed this last time, they said something about the coolant and the oil is or might be mixing. A related problem: When I start my car after it sits for more than an hour, it has the god awful rattle whcih shakes the car. After 20-30 seconds it goes away and I don't hear it again. Any thoughts on what this may be? Car has 103,000 miles, AND has yet to complete the factory recall GM putout this past month, unknown if that is related. Thanks

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  • Pontiac Master
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Your intake manifold gaskets need changed. gm made these gaskets out of plastic. buy a good set from autozone or oreillys. i had the exact same problem.

Posted on Jun 25, 2009

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Your head gasket needs to be replaced.

Posted on Jun 17, 2009

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Related Questions:

1 Answer

Coolant level keeps getting very low?


Check the upper intake gasket, you may have a leaking gasket. Check the bottom of water pump and see if it is leaking, if so pump needs replaced. The seal within the water pump sometimes goes bad and leaks out seep hole on water pump bottom. Make these checks with engine off!!! God-Bless!

Nov 14, 2015 | Cars & Trucks

1 Answer

I have a toyota aygo my coolant tempterture warning light comes on when driving


Your coolant is low !! stop driving ! it's not a complex thing to sort out.
You need to top it up quickly. Under the hood you will find an expansion bottle for your coolant. Lift hood and look to the front right inside the engine bay, in front of battery you will find a plastic coolant bottle (with "coolant" embossed on lid)
Wait until the car is cold.

Marked on the side of the bottle are MIN/MAX notches.
Check the level reading and fill to recommended level (MAX) with appropriate coolant for your vehicle.
Replace lid firmly.

This poses another question...do you have a leak ?
With the radiator and cooling system topped up, check underneath the car for drips of water.
If none, then turn car over and let run until warm. Check again underneath for leaks.

It is possible if no leaks were evident, water may be leaking into the engine itself. That is a bigger problem, not serious if caught early.

It may be that your system just needs a top-up, that is why they make it easy to do this. Always check your water and oil every couple of weeks, It's a good habit to get into. Takes a couple of minutes and can save you problems on a long trip later.
Good luck..

Jan 13, 2015 | Toyota Cars & Trucks

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2001 GMC Sierra low on coolant once a week


Slow leak.Could be almost anywhere.look for whiteish green corosion at hose connections,on the intake on the radiator or bottom of water opump to start.

Aug 28, 2012 | GMC Cars & Trucks

1 Answer

Loss of coolant


You dont have an evaporation problem. You have a coolant leak in your recovery tank. Its located at about one inch above the bottom of your recovery tank.

Jul 24, 2012 | 1998 Saturn SL

2 Answers

Keen on having to top up the coolant in my car


You most likely have a slow leak.
When your engine is cold, top up the coolant, with the bonnet up start your engine and wait till the engine warms and then look under the bonnet and on the ground under the engine to observer where the coolant is leaking from. Then you will be able to determine a possible fix.

Nov 24, 2011 | Cars & Trucks

1 Answer

The 'High Engine Coolant Temperature/Automatic Transaxle Fluid Temperature and Low Coolant Level' Warning light is FLASHING. According to owner handbook the coolant is low. I added coolant. Fluids...


Look on the back of the engine for antifreeze-either by number 1-2 cylinder or back by the brake booster. It is a know problem with Saturn engines, leaking by the rear intake. Check under the surge tank, they crack and leak too-check the bottom of the water pump for leaks, it has a weep hole that, if the seal inside is broken, will leak. you need to look for symptoms and evidence of leaks-if there is no obvious leaks from hoses, or outside the engine anywhere, it may be a head gasket-check your oil for a milky texture, or greyish color. check the bottom of the surge tank for oily residue, and look for smoke coming from the tailpipe.

Jul 21, 2011 | 1998 Saturn SL

4 Answers

99 Chevy Malibu running hot


is electric radiator fan coming on? if not the relay or fuse is bad

Jan 16, 2010 | 1999 Chevrolet Malibu

2 Answers

Coolant Loss from Overflow Tank


It may be you have a leak in your head gasket and the coolant is burning up in your engine. Does your oil look milky at all and is your exhaust smoke white at all. It may be a small enough leak that it burns off enough without any symptoms other than you having to fill up the tank..

Now you can test if you have a leak in your head gasket. If your pressure cap is good, start the car cold with radiator cap off, (and radiator full), it will put up steady bubbles, the worse it is leaking the worse the bubbles will "flow"!

An occasional "small bubble" is not a problem, as it will push out air trapped inside engine till it has heated up and thermostat has opened.

Another cause could be if you had the thermostat changed and it was inverted by accident. The "pellet" end (one with the little "wart" around the shaft from top to bottom), goes down in water (from engine)

Sep 08, 2009 | 1997 Chevrolet Malibu

1 Answer

Coolant light stays on


check your hoses and look for leaks at the water pump, also look at radiator for leaks.

Feb 18, 2009 | 1996 Pontiac Sunfire

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