Question about 1988 Cadillac Sedan DeVille

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The heater in my 1988 Cadillac Sedanville is not working, also, after running the car and then leaving it sit while running it started to smoke out from under the hood. The smoke was just steam from the engine coolent. The car information center did not say that it was over heating, and the coolent is leaking out. The coolent is not gettin to the motor to circulate so until the new thermostat comes in, do I need to take the old one off since I am going to have to run it even tho the car was not over heating or could it just be that it is leaking and streaming from the water gettin on the hot parts?

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Most likely have a coolant leak somewhere. Could be the radiator, hoses, coolant reservoir, water pump. Get it resolved asap, wouldn't want to pull over to have your car rolling in it's coolant..

Posted on Jan 04, 2011

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Posted on Jan 02, 2017

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Hi I have a 1997 cadillac eldorado 4.6l northstar engine. It went from normal to blows clouds of smoke out the rear exhaust. Run sluggish.


clouds of smoke out the rear exhaus ,What color ? blue smoke is oil , white smoke is most of the time coolant is getting into the engines cylinders , Black the engine is running rich ,too much fuel . DTC P0135 HO2S Heater Performance Bank 1 Sensor 1
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P0441 & P1441 will be back , may take a day or two , but will be back because gas cap has nothing to do with it .

Honestly , you should take your vehicle to a qualified repair shop !

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1 Answer

SMOKES WHEN STARTING UP SOMETIMES


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1 Answer

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If a heater core ruptures, becomes clogged with parasites, or gets blocked in a hose (the 2 leading to the firewall under the hood on the passenger side) it causes the car to overheat, and/or leak.

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