Question about 1989 Cadillac Seville

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Losing coolant and comes out faster when engine is hot and shut off

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  • Anonymous Dec 07, 2008

    coolant leaks from hose i think

  • Edward Jones Dec 25, 2008

    i have the same problem then my service and coolant light go crazy...

  • Anonymous Jan 05, 2009

    my recently purchased cadi overheats after changing out the thermostat, and the coolant temperature regulator. one fan comes on at 223 degrees but dont know if the other one does after 238 degrees (like theyre supposed to) im currently looking into replacing the head gaskets and burping the coolant system. hopefully just burping the system is all that is required.

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I had the same issue and I flushed and drained my old coolant and added a premix 50/50 coolant that does not require you to mix, just add. I replaced my thermostat with a new one and most important I replaced my water pump and put a new gasket. once that was complete it ran fine. also I noticed that if I raised the temperature on my heater above 72 degress, the car starts to overheat. might want to check and see if yours does the same???
good luck and hope this helps.

Posted on Jan 17, 2009

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I feel for ya' , been there done that. The problem seems to be the head gaskets which fatigue from
the head bolts stretching, causing combustion gases to enter the cooling system. The pressure buildup of hot exhaust gas boils out the coolant causing an overheat condition. The "ONLY" solution
is a pressure bleed-off device used on hot water boilers, which is not a permanent fix, but you will get
quite a few thousand miles out of it. Second and final solution replace the head gaskets with the updated ones and be sure to include NEW HEAD BOLTS. Have Fun !!!!!!

Posted on Dec 24, 2008

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