Car is cooling down on down hills?

2003 MITSUBISHI OUTLANDER
120,000 MILES • 2.0L • 4 CYL • 4WD • MANUAL
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Hello there and happy new year. A week ago, I noticed that my car is cooling down when driving on down slides. It goes back to normal temperature when on level terrain or uphill. I suspect it's just a thermostat, but I wanted to ask you guys first. Also, any tips on replacing the thermostat would be appreciated. Thank you in advance.
Jan 12, 2023 at 5:57 AM
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Hello and happy new year! Yes, the thermostat would cause this to happen. Here is a guide to help walk you through the steps and instructions in the images below to help you with your car:

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

Check out the images (below). Please let us know if you need anything else to get the problem fixed.

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Jan 12, 2023 at 5:12 PM
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Thank you. I was wondering if I need to get some kind of gasket for the thermostat, the new part does say that it comes with a seal, does that work like a gasket for it?
Jan 13, 2023 at 8:32 AM
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Yes is does, it might be rubber which needs no sealant just make sure the sealing surfaces are clean.
Jan 14, 2023 at 1:21 PM
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Thank you for your help. I've always found good help in this site whenever I needed it. If there is any way to support your site let me know.
Jan 14, 2023 at 11:55 PM
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Also, all the new thermostat says it opens at 82 degrees and I was wondering if that's alright?
Jan 15, 2023 at 5:37 AM
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That is good to hear, we do have a gofundme page https://gofund.me/c7d318ad

The thermostat should say 182 correct? if so that is okay.
Jan 16, 2023 at 3:14 PM