Need the location of the thermostat for replacement

2002 TOYOTA HIGHLANDER

160,000 MILES • 3.0L • 6 CYL • 2WD • AUTOMATIC

PHARMCAT

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Doing a radiator flush. I don't think it has ever been done either. Would like to replace the thermostat while I'm doing the flush also. It looks kind of difficult to do, but I need help with location and the best way to access it. I see the coolant tube, but after that I don't know how to proceed.
Thanks,
Ron

Sep 28, 2021 at 10:04 AM

SQM

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Hello,

To replace the thermostat, you will have to remove few components, like the air filter box and the battery.

Before getting started you want to drain the coolant.

https://www.2carpros.com/articles/how-an-engine-thermostat-works
https://www.2carpros.com/articles/replace-thermostat

I have attached the replacement instructions below as well as the testing procedure.

Please let me know of any questions.
Thank you.

Images (Click to enlarge)

Sep 28, 2021 at 10:18 AM

PHARMCAT

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Thanks, I found it. What is the jiggle valve/pin on the thermostat? Which way should it point when I install it?

Sep 28, 2021 at 1:34 PM

SQM

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That pin is to allow trapped air to pass through the thermostat. You want the pin to be at 12 o clock position.

Sep 28, 2021 at 1:51 PM