peter 12/22/2012

2004 Cadillac DeVille Base 8Cyl4.6L - Preventive Maintenance

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Why is my car overheating?

Sometimes there is no heat and only cold air comes out when the heat should be on. If I start driving the vehicle around then the heat comes on. Also sometimes when I'm idling the vehicle it overheats.

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  Jimm 12/23/2012

  Several possibilities; coolant mixture is incorrect (not at recommended 50/50 water and anti-freeze), faulty thermostat, faulty / clogged radiator hoses, faulty water pump, clogged / restricted cooling passages in the engine or radiator, fan belt stretched or slipping.
  
  
  

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  gm3119 12/26/2012

  Had same problem with my 199 deville... It was the water pump. Get ready to lose money. :(

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• 
  Jimm 12/26/2012

  Try the many on-line auto parts sources, such as; www.autopartswarehouse.com or www.rockauto.com for the replacement parts. For example, they (RockAuto) list the water pump for around $22.00 for your vehicle.

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