NO HEAT 05 North Star v8
10

Asked by Brendan Nov 01, 2016 at 11:02 PM about the 2005 Cadillac DeVille Sedan FWD

Question type: Maintenance & Repair

Replaced thermostat and have the correct fluid level
I am a mechanic in training. The car takes a while to
heat up but does not over heat. Heater is blowing
cold air and there is a intermittent noise in the water
pump but nothing out of the ordinary . How can I
tell if it is the water pump? Or something els again I
already replaced the thermostat. Thanks

3 Answers
34,745

lrodri911 answered 7 years ago

When cold, remove radiator cap and start car, let it reach ooerating temperature so the thermostat can open, once it has reached temperature u should see steady coolant flowing in the radiator, if it doesn't, replace water pump. Assuming you installed the thermostat correctly and it is opening

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10

Brendan answered 7 years ago

I had the cap on when I tested it. The car was warm when I did the swap so maybe I incorrectly installed the thermo but I've done it plenty of times.

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34,745

lrodri911 answered 7 years ago

It can happen. Just remove the housinh cover and see if the pointy part of the thermostat is facing outwards

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