Question about 2006 Chevrolet Cobalt

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Overheats and water in radiator disappears - 2006 Chevrolet Cobalt

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There's a chance you have a blown head gasket. If that's the case, your coolant isn't disappearing, but leaking into the cylinders. Check your oil. If it looks kind of milky, it means it's mixing with your coolant, which indicates a blown head gasket. Any white smoke coming out the tail pipe is also a tip off.

Posted on Aug 02, 2008

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How do I stop my 01 explorer from 0ver heating. I already replaced water pump thermostat and radiator


Since you have done the basics, more information is needed. Under what conditions does it overheat, and how severely? Only when at idle for several minutes? Could be bad fan clutch or missing/damaged fan shroud. Severely overheats so bad you can't drive it at all? Blown head gasket? You can often diagnosis this by running with radiator cap removed and see bubbles in the radiator, or also look for water in oil, or oil in the coolant. Also, check with parts store. I think certain years of these run a reverse direction water pump, and if you get the wrong one they will overheat badly.

Dec 12, 2014 | Ford Explorer Cars & Trucks

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Can a bad heater core cause your vehicle to overheat? I have a 1994 GMC Suburban


I WOULD SAY NO BECAUSE WATER ONLY CIRCULATES WHEN YOU TURN ON THE HEATER, BUT IF YOUR VEHICHLE CONTINUES TO OVERHEAT IT COULD BE 5 THINGS. CLOGGED RADIATOR,RADIATER HOSES.THERMOSTAT,RADIATER FAN SENSOR OR THE WATER PUMP

Feb 14, 2013 | 1994 GMC Suburban

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Why does my car overheat? The mechanics don't even know...


There are multiple things it could be,thermostat,water pump,radiator,or your belt is loose.Is your coolant disappearing,having to refill,if so then water pump is leaking and needs replacing,if fluid okay,then maybe the thermostat isn't opening properly,but first check belt to see if it is turning tightly.Your radiator may be clogged and needing blowed out.

Aug 07, 2012 | 1995 Ford Taurus

2 Answers

1990 subaru legacy- overheats, I"ve


Most likely you put the thesmostat in upsid down. Good luck

Aug 17, 2011 | 1990 Subaru Legacy

2 Answers

I have a 2002 Jeep Liberty Sport, 3.7L that continues to overheat. The problem only seems to occur when I drive for 20 minutes or more, and above 65mph. It does not overheat when I drive in town at 35-40...


I had a similar problem with my 2006 Dodge Dakota cooling system. After the same tests and replacements you mentioned, the dealership replaced the radiator with a new radiator and the cooling problems disappeared. Apparently there was a defect internal to the radiator that did not let the radiator provide maximum cooling at higher temperatures. Hope this helps.

Aug 08, 2011 | 2002 Jeep Liberty

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Even after replacing the radiator, thermostat and


The problem with overheat is due to poor coolant circulating. The main culprit is the Radiator. When the radiator is clogging up, coolant can't be circulating. The stagnant coolant inside the engine water jacket keeps absorb heat from combustion chambers having no way to dissipate the heat then the engine is overheated. You can test the water pump by removing the thermostat, then hooking everything back. Open the radiator cap, then turn on the engine to see if water flowing down to several small tubes inside the radiator. If water can't go down fast enough to cause over flow at radiator opening then your 90 Legend Radiator already got clogged up. Replace with a new radiator, not even a rebuilt one. Good luck.

Dec 13, 2009 | 1991 Acura Legend

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Car is overheating, thermostat was changed and the radiator was flushed, car does not overheat while idoling, but when you start driving it overheats


It sounds like water pump may be your problem. It circulates a 50/50 mixture of glycol (or some form of) and water through the engine block and cylinder head and back through the radiator. In the radiator the mixture is cooled when air passes over the fins of the radiator. This is accomplished by driving or a mechanical/electrical fan when stationary. The water pump also circulates the mixture through the heater core giving the car heat. If the water pump is not circulating the water back to the radiator to cool, it will overheat. More heat is caused by the engine when driving (much less heat when idling), hence the overheating while driving.
I hope this helps and good luck!
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Nov 04, 2009 | 2003 Nissan Maxima

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1990 Subaru Liberty Overheats


Hi,

I had the same problem with my 1993 Liberty LX. Remove the thermostat (located inside bottom radiator hose engine connection - take the connection off and thermostat is inside). Reassemble (minus thermostat), reconnect bottom hose. Slowly (very, very slowly) refill the radiator and remove the bleed plug ( located beside the top hose connection to the radiator - a black square plug with a phillips head cross in the middle). When the radiator is full and clear water (no air bubbles) is coming out of the bleed point, replace the bleed plug and then the radiator cap.

Run the engine for five minutes (approx) or until normal engine temperature is reached. Allow the engine to cool down and recheck the water level - fill if necessary ensuring that the bleed plug is open and clear water is coming out of that point. Replace Bleed plug and then radiator cap. Run engine for five minutes (approx) and then test dive. If the engine overheats keep filling the radiator until there are no air bubbles coming from out of the bleed point.

This fixed my overheating problem. Good luck and safe motoring.

Aug 06, 2008 | 1993 Subaru Legacy

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