Question about Cadillac Eldorado

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My 1999 Cadillac Eldorado north star is over heating, how can i change the thermostat? where is it located?

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  • Anonymous Mar 15, 2014

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The thermostat is usually located on the engine end of the upper radiator hose.

Drain the radaitor of coolant, remove the upper radiator hose from the housing.
Usually a couple of bolts hold the housing in place, once the bolts are removed, seperate the housing from the engine, you should now see the thermostat, you will also discover it has a gasket to be replaced at the same time. make sure the surfaces are clean, use some gasket cement to hold the new gasket in place. reassemble the unit, reinstall rad hose, and refill radiator.

Hope this is od some help.
Ed

Posted on Apr 20, 2009

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Posted on Jan 02, 2017

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How do you change a water pump on a 2000 Cadillac Eldorado


if you have the north star motor it on drivers side tward front grill, you will find a belt cover you need to remove an you'll need a special tool most auto parts stores will rent it to you for a small fee ,it likes a large socket ,if you have the new one you'll see how it fits in socket, using a rachet with socket place over water pump and turn a 1/2 turn to left and it's out ,replace in reverse ,take care not to disturb new o ring seal ,and don't use silicone to seal it , BUT general motors strongly suggest you do use some type of motor sealant , now for the bad news =these motors are very bad with over heating issues that have plaged the north star for years , if you drain antifreeze make sure you use air purge valves to remove any air from motor (purge valve looks like a brake bleeder screw ) or it will continue to over heat, im guessing that's why your doing this , if over heating is a problem take the time to go over all aspects of the cooling system =belts, flushing motor, cooling fans working correctly ,coolant filled, well I REALLhope this helps you ,good luck with it .
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1999 cadillac eldorado


Just follow the Upper Radiator Hose to the Block. The Hose will attach to a Bell housing on the Manifold. Remove this Bellhousing and the Hose. The Thermostat is Right underneath the Bell Housing. Reinstall the Same way that the Old one is sitting when you find it or it will not work Properly.

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