2003 Deville - cooling system problems

3850 Views 34 Replies 5 Participants Last post by 20grand, Apr 25, 2015

20grand

Discussion Starter · Mar 30, 2015

I have to do this on my Deville in the AM. It drives and rides nice but after a while at idle the gauge will increase and cold air kicks through the vents. After I rev the rpms real high, the gauge comes back down and then I have heat. I also checked the tank and she's nice and full. Was thinking maybe a faulty thermostat but will check the lines before I pull that out.

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MoistCabbage

· #11 · Apr 1, 2015

A little bit of grease on the friction points on the tool will make it easier to turn.

MoistCabbage

· #22 · Apr 7, 2015

Just drive it normally and check it in a few days.

MoistCabbage

· #26 · Apr 8, 2015

It maxed out? If the water pump is spinning and the purge line is clear, it's time for a block test.

MoistCabbage

· #28 · Apr 8, 2015

If you can see the pump pulley turning, it's doing its job.

Did you do the block test after an overheat?

MoistCabbage

· #30 · Apr 8, 2015

But fairly soon after the overheat?

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