Installing a new thermostat does the coolant need to be drained?

2012 CADILLAC CTS
165,000 MILES • 3.6L • V6 • 2WD • AUTOMATIC
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JUSTANJ57
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  • 1 POST
Do i drain the coolant before installing the new thermostat?
Oct 25, 2024 at 12:59 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Yes you do, some don't but it makes a mess, and it is better for the gasket sealer to dry without contamination. Here is how to drain the coolant and how to change out the thermostat in case you need it. Check out the images (below). Let us know if you need anything else.
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Oct 25, 2024 at 11:45 AM
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