Stay tuned

[Jason@SportsCar]

So I had some time to play with this some more while I had two engines sitting on the garage floor. I put both thermostats in a pan on the stove and heated them up to get open and closed lengths.

The Stant MR2 unit will fit. The only issue is the bypass will always be closed - with the stock thermostat the bypass is only closed when the thermostat is open.

So does anyone know what function the bypass has?

Originally Posted by Jason@SportsCar

Another item to put on the to do list. Going to try the 170 degree thermostat from the MR-2 Spyder. Dimensionally is measures the same as the Yaris part - and the Yaris uses the same standard part as the Spyder - so hopefully it works.

$10 VS $75+ for the TRD Japan part.

I probably wont install it until we put the new motor in.