Replacing thermostat?

2000 BUICK CENTURY
95,000 MILES • 3.1L • 6 CYL • 2WD • AUTOMATIC
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DHARMAKLMJDRUEPPEL
  • MEMBER
  • 2 POSTS
Car temperature is consistently fluctuating unable to regulate. I was wondering what tools and parts I’ll be needing to purchase to replace the thermostat.
Dec 31, 2022 at 7:07 AM
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JACOBANDNICKOLAS
  • ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

Replacing the thermostat is actually not bad to do. You will need to drain the radiator to a level the height of the thermostat. There is a drain at the bottom of the radiator.

As far as the thermostat goes, you will need to remove the radiator hose that is attached to the thermostat housing. I'm not sure what you have on your vehicle, but if they are original, you will need a good set of pliers or if it has been replaced, a straight-edge screwdriver.

To remove the housing, there are only two bolts holding it in place. I can't be certain, but the bolts will be about a 1/2" inch bolt.

The only other thing you need is something to clean the old gasket material from the housing and where it mounts to the engine.

Here is a link that explains how in general one is replaced:

https://www.2carpros.com/articles/replace-thermostat

Also, I attached the directions specific to your vehicle below.

Let me know if this helps or if you have questions.

Take care and Happy New Year.

Joe

See pics below. Note pic 1 is just to show the bolts needing removed.
Dec 31, 2022 at 5:08 PM
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