2000 Deville DTS Overheating

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Northstar Engines and System Technical Discussion Discussion, 2000 Deville DTS Overheating in Cadillac Engine Discussion; I have a 2000 DTS with 117,000 miles on it. I am haveing a temp issue with the car. I ...
  1. #1
    DTS KING is offline Cadillac Owners Member
    Automobile(s): Cadillac DTS
    Join Date
    Sep 2007
    Dallas, Tx

    Smile2000 Deville DTS Overheating

    I have a 2000 DTS with 117,000 miles on it. I am haveing a temp issue with the car. I can drive the car with the heater on the heater will get cold and then the temp hand will go up. After a while the heater will get back hot and the temp hand will go down. Also as long as the car is setting still the temp will stay down. I have replace the radiator, water pump and the thermostat. Any ideas of what the problem could be?

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: 2000 Deville DTS Overheating

    Do a search for "Purge Line". Sounds like you have air in the system.

  4. #3
    CadillacSTS42005's Avatar
    CadillacSTS42005 is offline Banned
    Automobile(s): 2005 STS4 1SG: GM Acc Lights, Corsa, Platnium Grille, Volant
    Join Date
    Oct 2005

    Re: 2000 Deville DTS Overheating

  5. #4
    Rafterd's Avatar
    Rafterd is offline Cadillac Owners Fanatic
    Automobile(s): 2005 STS, 2004 Dodge 3500 Cummins, 2008 Buick Enclave
    Join Date
    Sep 2007
    Stephenville, Texas

    Re: 2000 Deville DTS Overheating

    Look down about 7 or 8 post for "Overheating". Mine is doing the exact same thing.



  6. #5
    Destroyer is offline Awaiting Email Confirmation
    Automobile(s): '67 Cutlass,'92 Z28, '12 Crosstour, '12 Cube,00 GMC 4500
    Join Date
    Oct 2003

    Re: 2000 Deville DTS Overheating

    Could be an intake gasket as well. I just repaired the intake gasket on my conversion van and it did the exact same thing your car is doing. I didn't overheat but it ran a lot hotter than usual plus when I turned on the heat it would come out hot then cold like yours.

  7. #6
    Ur7x is offline Cadillac Owners Connoisseur
    Automobile(s): 02 STS
    Join Date
    Dec 2004

    Re: 2000 Deville DTS Overheating

    Is the car new to you? This is also a symptom you get when someone adds "heal-a-seal" in a can to the coolant system. It never fixes the head gasket and it almost always plugs the heater core the rad or both.

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