Question about 2003 Hummer H2

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Overheating I have tried doing a radiator flush and have refilled the radiator again and thought that solved the problem but it is still overheating. I read somewhere that I may need to replace the hoses if they show signs of collapse but I don't see any of the hoses collapsing... I may need to look harder... But, how can I test if it is the waterpump or the thermostat?

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If the thermostat doesnt open hoses can **** in on them selfs Watch hoses while at operating temperature and rev the vehicle while watching the radiator hoses,top and bottom,to see if they stay normal.The bottom hose usualy has a steel inner winding to stop water pump from sucking hose in but have seen these corrode and collapse.I think you should replace the thermostat first and check that the fans are cooling the radiator correctly.Also check the accuracy of the water sensor that sends the signal to your dash gauge to make sure its not a simple sensor fault.Generaly a water pump will not give problems until it starts to leak.Have you bled the water system as air locks can cause your problem as well.good luck

Posted on Oct 23, 2008

Thank you for the post... I will look at my hoses closer to make sure they are not collapsing.  It can't be a sensor cause I have noticed that when it overheats and I wait for it to cool when I ad water it takes in a lot of water.

Posted on Oct 23, 2008

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