Question about 2002 Pontiac Montana

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I am losing coolant somewhere but can't see where it is coming from. It is causing it to overheat.Where could it be coming from.

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If there is absolutely no visible trace on the ground of a leak, you may have a leaking head gasket. this is an internal which causes coolant to leak into the combustion chambers and get burned up and expelled through the tailpipe w/ the exhaust. you'll need to take it to a shop to confirm this. the coolant going into the chamber means that combustion gases then wind up in the cooling system as well, so a shop can stick a tailpipe emissions probe in the radiator and tell you if those gases are present (normally there should be none).

Posted on Sep 30, 2009

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Posted on Jan 02, 2017

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2006 Equinox. Losing water. Over heats. Is this a thermostat or water pump problem??


Depends on where the coolant is going.
If it is an external leak it could be a leaking water pump. If there are no external leaks and you are loosing coolant, it could be a blown head gasket. Especially if the engine has already overheated once.
A sticking thermostat would cause the engine to overheat and then loose coolant from the overflow tank. But not until it overheats.

Oct 06, 2015 | Cars & Trucks

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Overheating coolant boiling out into reserve tank


you have a blown head gasket.. doesn't have to have coolant in the oil for a blown head gasket... if hoses are rock hard when running then you have exhaust leaking into the coolant via a blown head gasket...

Jul 14, 2012 | 1998 Plymouth Breeze

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2001 V6 FREELANDER RAN OUT OF COOLANT.AFTER TOPPING UP NOTICED THE TEMPERATURE GOES UP TO MIDDLE THEN FAN KICKS IN BUT SWITCHES OFF SOON AS ENGINE SWITCHED OFF


you may have a leak somewhere thats maybe why you had to top it up,generally a vehicle doesn't use water unless there is a leak causing it is lose water, it is quiet normal for the fans to come on when the engine starts to overheat that is what they are designed to do, it is also normal for them to cut out when the engine is switched off,you need to check for any leakage......hope this helps.....cheers.

Jul 02, 2011 | Land Rover Freelander Cars & Trucks

1 Answer

Get very hot and overheats


Check your coolant level.
There will be a resevoir tank somewhere under the hood. make sure the level is at par, and continue checking it after driving for about a week, because the level of coolant in your rad may be low, so it will draw more from the resevoir, dropping that level again. Need to make sure it stays off.
If coolant level is fine, then you will need to check the temp sensor, and coolant sensors.
Do any lights come on in the dash? (ie. service engine light, check engine light, etc?)

also check to make sure, while the vehicle is running, that the fan turns on. If this doesn't turn on, ever, even while the engine is too hot, then that will cause the engine to overheat.


I hope this helps!

Jan 11, 2011 | Mitsubishi Pickup Cars & Trucks

1 Answer

I may have added too much coolant. After adding it, I drove for about 15 minutes. A few hours later, the tempurature gauge light came on. I check the coolant level again and there was nothing in the...


No, you can't add too much coolant. Rather, it does not hurt anything if you do. Did you add it to the radiator, or to the overflow tank?

Let it cool, then remove the radiator cap, and if needed, add coolant to the radiator. Put the cap back on, and fill the overflow tank to the "full - cold" line. Start it and run it a few minutes and look for leaks. If you find no leaks, drive it for a day or two, then let it cool and check it again. If it is down a lot (without overheating), you have a leak somewhere. If you lose enough coolant, that will make it overheat. However, if it overheats, that can cause loss of coolant, when you stop the car, you will see steam and smell coolant, and often hear it boiling.

If it overheats again, make note of when it happens: driving on the highway, or stop-and-go around town. Overheating on the highway usually indicates a clogged radiator, while in-town overheating usually indicates a bad cooling fan (you don't need the fan above about 30 MPH). A bad fan is usually the fan relay, but it can be the fan thermostat (different from the engine thermostat), or a bad fan motor.

Oct 10, 2010 | 1999 Chevrolet Malibu

1 Answer

Blown head gasket


Look the engine over and see if you can find any external leaks, change the thermostat and make sure that fan(s) are operating.
Check the oil for water...loosing that much, it has to show up somewhere. Blown headgasket usually puts oil in coolant or coolant in oil, causes an external leak from between head and block or goes out through the tailpipe as steam.
look carefully and you will find your problem!!

Apr 27, 2009 | 1991 Toyota Previa

1 Answer

I have a 89 jetta gas. Im losing coolant somewhere and it overheats. But i cant find any leaks (except a little oil). Please help


Are you getting a lot of steam/condensation from the tail pipe? Is it more visible when the engine is hot? If so you need to have the coolant tested for signs of exhaust gases as it may be the head gasket has failed.

Apr 07, 2009 | 1996 Volkswagen Jetta

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