overheating problem

CADILLAC DEVILLE
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TOPDOGII
  • MEMBER
  • 3 POSTS
I have just purchased a 1997 Deville 4.6 Northstar with 206K miles on it.
The car runs excellent and everything condition wise is superior. The only problem I am having is that the car runs very hot 200-206 all the time. It get overheated whenever a load is put on the engine at anytime. The temp will spike and overheat anytime the car is "punched" or driven over 69 mph.
Is there anything I can do to help with the overheating issues. I love the car but would like to drive the car the way it was designed... what can I do????? :?:
Dec 10, 2006 at 10:45 PM
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BACKYARDMECHANIC
  • ✓Experienced Mechanic
  • 337 POSTS
If there is no other signs ( white smoke out the exhaust oil in the anti freeze or leaks) I would suspect there is problem with one of the following.
1) Radiator or hoses clogged
2) water pump is defective Not pumping correctly
3)THermostat wrong rating or not opening all the way
4) Incorrect antifreeze level
5)Antifreeze concentration incorrect
6)Faulty pressure cap
7)Loose fan belt or defective clutch fan
8)Air trapped in the system
Hope this helps Backyardmechanic :)
Dec 11, 2006 at 12:13 AM
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MATHIASO
  • ✓Experienced Mechanic
  • 1,209 POSTS
if you still do not find anything wrong after checking what backyardmechanic has mentioned;
- check your radiator fan, if an air dam is damaged and it's not directing enough air up into the radiator.

-Certain ignintion-system problems can also cause engine overheating. If the the ignition timing is not correct , the air and fuel mixture in the cylinder could burn at the wrong time,causing the engine to run at a higher temperature than normal
Dec 11, 2006 at 1:02 AM
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