How to replace the bad thermostat on your Supra

Published: 13th October 2011
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It is frequent for the thermostat on your Toyota Supra to fall short and turn out to be stuck in the open up or closed place immediately after several years of support. This will adversely have an impact on motor operation. If the thermostat stays open up, the engine will not be in a position to attain working temperature. If the unit continues to be closed, the motor will overheat, leading to severe and pricey harm. Happily, you can exchange the lousy thermostat on your Supra model employing some.

Position a drain pan underneath the radiator drain valve, open the valve and take away at minimum two quarts of coolant to carry the stage beneath the thermostat housing. Then close the drain valve.

Find the thermostat housing on your Toyota Supra product. Comply with the higher radiator hose towards the motor. The hose is connected to the housing. If you have a 22R-EC motor model, you will see the housing connected to the aspect of the motor. All other designs have the thermostat housings sitting on top of the engine.

Take away the clamp securing the higher radiator hose to the thermostat housing utilizing a pair of slip joint pliers.

Detach the upper radiator hose from the thermostat housing by thoroughly twisting the hose appropriate and left as you pull it off the housing fitting.

Eliminate the thermostat housing from the motor block utilizing a ratchet, ratchet extension and socket.

Withdraw the thermostat from its seat on the engine block.


Usual automotive thermostat [kpishdadi:].
Clean the thermostat housing and engine block mating surfaces of any gasket material left on them using a plastic scraper to prevent harmful the surfaces. This applies to the 8R-C, 18R-C and 5M-GE motor types.

Set up the Thermostat
Set up a new O-ring seal on the new thermostat if you have a 22R-EC engine model.

Arranged the new thermostat on the motor and make confident the thermostat spring points in direction of the motor.

Put a new thermostat gasket on the mating floor of the engine block if you have an 8R-C, 18R-C or 5M-GE engine product.

Set up the thermostat housing on the motor block and start the two mounting bolts by hand to steer clear of injury to the threads. Then tighten the bolts using the ratchet, ratchet extension and socket.

Attach the higher radiator hose to the thermostat housing.

Safe the higher radiator hose to the thermostat housing with the clamp using the pair of slip joint pliers.

Add a 50/50 mixture of distilled h2o and antifreeze to the radiator and deliver the degree to about an inch under the radiator neck. Create coolant to the reservoir and carry the degree in between the Lower and Full marks.

Commence the motor and check for coolant leaks on the upper radiator hose at the thermostat housing.

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