Question about 2003 Chevrolet Malibu

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The red light in the car is coming on. It looks like a radiator cap. Can you tell me if I need to replace the radiator cap?

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  • fortev72 Aug 28, 2010

    Yes. The car is overheating, but, it cools down after I ride it for a while. The fan kicks on. I do put water in it,but some how the water evaporates but i do not know where to. It does not leak on the ground.

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Is your car over heating. Have you checked to see if you need water. I just had a similar problem. I had water but my car was over heating. I figured out it was the thermostat which I bought for around $10.

Posted on Aug 27, 2010

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After getting my car repaired by a good samaritan, who helped me replace a leaking radiator hose and after the replacing a defective radiator cap, the check engine light started blinking, as well as the...


I do not know the answer to your codes. What I do know is that if you replaced a Radiator hose and Cap and did not fill the radiator properly afterwards that an air pocket could have developed in your System.

I would suggest that you leave the car sit over night, then in the morning before you start the car check the Radiator to see if it is full of fluid. Do this by opening the Radiator Cap and have a look inside. Fill the Radiator if it needs to be filled at this time.

Now put the radiator cap on but put it on loosely. Only tighten it enough that it cacthes but will not come off. At this point you can start the car and let it warm up. Let it run until the radiator hoses are good and hot. Top and bottom or until you notice that the level of coolant in the Radiator has dropped. Check that by removing the cap when the hoses are starting to get hot. Be sure that you do not open a radiator cap that is on tight. If you do then the presure buildup will cause the hot fluid to come spraying out and burn you. As I said earlier the cap must be put on loosely. This allows air to escape and no presure to build up.

When the radiator fluid level drops then any air that is in the system should have circulated out of it. So now fill the radiator again, slowly as not to cause a spray back. Once the radiator is full again then repalce the cap. Put it on tightly this time and be sure that your over flow tank is fill to the proper leval.

Repeat if you feel that you still have an air pocket in the system.

If this was not done when you replaced the hose and cap then you do have an air pocket. Hopefully this proccedure will remove your air pocket and stop your warning lights from blinking.

Good luck

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Low radiator fluid light came on, engine started to smell like burnt wire/oil? Turned off let it cool and than added fluid. Heater now not blowing out hot air. I am plannig on adding more fluid b/c light...


will try to help.let car cool all the way off 1st take radiator cap off, top off w fluid, start car w/ radiator cap off. let it get to operating temperature w/motor running, keep addind fluid, look under car for leaks the whole time please!! if at any time-- you see fluid coming out beyond what you may spill or overfill,,shut the car off!! you may only be low on radiator coolant.with the radiator cap off while filling, you should see the fluid moving[circulating] inside the radiator, bubbles moving downward,,ok spewing upwards out of radiator NO if this repairs good, replace cap and drive 10miles regular speed. no hot,,good,,if hot let cool copletely,check cooling fan relays under hood,black box, look for fan relays, when key is moved back from on to off,,relayshould tick,put your finger on it while someone turns key off to on,WILL NOT SHOCK YOU!! just a very small vibration to fingertip. if this good, with engine running, do engine fan come on to cool, look between radiator and engine,at the fans to insure it;s coming on. you really should be able to hear it, but i prefer to see it visually. AS ALWAYS,IF YOU NEED FURTHER ASSISTANCE OR HAVE MORE QUESTIONS,PLEASE REPOST YOUR QUESTION, AND AN EXPERT WILL HELP WITH PHONE OR ONLINE ASSISTANCE.

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If your temp guage is going up, than your came may need antifreeze. If it has fluid, than you may need to have thermostat replaced.

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There is a light in the dash that is always on it is red


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