Question about Chevrolet Malibu
These are real pain to bleed all the air out. Run without the cap on the resevoir, turn the heat on full, and watch your temperature gauge. The temp. should be 220 degrees. Then listen for the fans and fill the resevoir with coolant and distilled water as needed. Try this first and let me know. Oh, by the way, did you have any machine work or a machine shop look at the heads?
Posted on Oct 24, 2010
You have a cracked head or blown head gasket. To verify this run the engine and take the cap off the radiator. Check for bubbles or use a carbon monoxide detector to sniff the coolant when bubbles appear.. OR you can have a cylinder leak down test done Or you can run a compression test. The first and last test wont tell you where the problem is though.
Posted on Oct 23, 2010
I had a similar problem. When you see that the vehicle is overheating, turn the A/C ON a couple of minutes, this makes the HI Speed or the Auxiliary Fan (if your vehicle has two fans), kick in and your temp. will drop quickly. NOTE: At normal engine temp., the Cooling Fan should be always on when the A/C Compressor is engaged.
On my case it was a little more complicated, my son was driving the car and it overheated he added water, the water build a lot of rust and plugged the radiator, I had the radiator and cooling system flushed professionally and that took care of that issue.
My cooling fan was working fine, when the temp. gets almost half way on the gauge, the fan should kick in. If yours doesn't, check Cooling Fan Relay, if OK, your Coolant Temp. Sensor may be defective, check wiring, if OK, replace sensor.
On your owner's manual you'll find the procedure to bleed air form the Cooling System. Make sure you do it that way. And last, check the hose that goes form the radiator to the reservoir, make sure there are no leaks and that the hose clamps are tight. Check Reservoir for cracks and signs of leakage, and make sure the Cap has a tight fit and the hose that goes into the reservoir is in place. If the reservoir cap or the hose clamps are not properly fit, vapor will get out and air will be sucked into the system.
On my case, the elbow on top of the reservoir cap was cracked and the low coolant light was always on. Once I replace the reservoir cap the light went OFF.
I hope this will apply to your vehicle and help to solve your problems.
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Posted on Oct 23, 2010
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Posted on Jan 02, 2017
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