Question about 1998 Cadillac DeVille

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Seating still the car will overheat start back driving it cool ba

Seating still the car will overheat start back driving it will cool back down

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  • Anonymous Mar 27, 2014

    car continuously overheats then cools down then overheats again and so on

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Check for coolant flow at the Purge line,this is a common problem on the Northstar.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.

Posted on Oct 03, 2009

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This is a sigh of a week water pump or sludge in the cooling system.

Posted on Oct 03, 2009

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1 Answer

6 cylinder ba Fairlane it runs ruff under load for the first 30 miutes then comes good.


Here is an idea, considering that symptom is common on many cars today.
Check the "engine temperature sensor" of the which there are two screwed into the engine block.
One of those sensors goes to the computer, one of them goes to the electric cooling fan in front of, (or behind) the radiator.
If the one to the computer fails, it can cause this symptom, because it is telling the computer the wrong engine temperature.
If the one to the radiator fan fails, the car will overheat.
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Do you know if the cooling fan works ?
Have you checked the coolant level in the radiator ?

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Check the radiator fan operations. Gas mileage sucks because the air filter box is toast. Computer can't get an accurate read on incoming air.

http://ricksfreeautorepairadvice.com/car-overheats/

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For car running hot and overheating issues, I suggest to you go through this help links.

Click this link below and go through the troubleshooting procedure to take care of the problems: ----



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http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
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Within five minutes, it starts to redline overheat, if you drive 2000rpm, it goes down, but goes back up when you idle


it could be a stuck thermostat, or a plugged radiator or cooling system, check to be sure cooling fans come on when they should or it will overheat. when moving it is air cooled through radiator. thats why it over heats at a stand still. check fans first, it could be a fuse relay or the coolant tempurature if fans do not work or coolant sensor not turning on coolant fans at the proper tempurature.

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1996 Protege: my car overheats when i drive it but it cools down...


have the thermostat checked it could be stuck open or closed it cools down from your fan

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There may ba a problem with the radiator fan. motor and/or motor relay

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Radiator whines and overheats when not moving


Have someone flush cooling system & check condition of rad for debris in front of rad & blow or spray it out as necessary. Next time it runs hot, turn your heater temperature up high, blower fan on high, and see if gauge starts to come back down a little. If it does, my guess is your rad needs replacing, or at least consider trying a good reverse flushing of the system first, then rad.

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