Question about 1999 Cadillac DeVille

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Overheatin cady 1999

There is no water circulation. changed radiator, and when flush engine its cool dawn. looks like pump is not running water. ??????

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  • JAANUTNO Nov 11, 2008

    I have allready did what You saied. I try run without thermostat and radiator cup is 13-15 pci, And no leaking nowere. Thank You any way. still looking solutionn for this problem. Cheked thermostat - it start to open before boiling point.

  • JAANUTNO Nov 11, 2008

    Thank Yiu , but what problem the waterpump can be. everything looks good. Blades i.e waterpump is "running". I can see it , when I take waterpump cover off. I cant understand it. Mysterious?????

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Hi jaanutno, I would suggest the to replace the water pump it sounds cavitated,after all else it is only an impeller in a housing so if it wont circulate replace, it good luck

Posted on Nov 11, 2008

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Hello jaanutno, did you check to make certain the thermostat is operating? there may also be a weep hole on the water pump and you will see or feel some moisture there, you can remove the thermostat and boil it on the stove to see if it works once it reaches temp if it doesnt open you need a thermostat if it does work put the thermostat housing back together without the thermostst and start the vehicle to see if it will circulate one more thing to check is that the rad cap is proper for the radiator (how many psi) hope this gets you on the road good luck

Posted on Nov 11, 2008

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The overheating of the car can be due to many reasons and you need to check on each one to confirm the working of the system.
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