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Remove entire air cleaner system (box,filter,snorkel.)

Thermostat housing is located just next to distributor. (has hose connected to it.)

Using a 10mm socket remove the two bolts holding the housing to block.

Before pulling housing away from engine you will need a catch pan under the car below thermostat. You will lose about 1/2 a gallon of anti-freeze.

Now pull housing back from engine to expose the thermostat,noting how it is sitting in there, remove and replace with new one, be sure to remove and replace the rubber gasket that fits around the thermostat to seal it. You will NOT need liquid sealant aka blue glue in this application. Replace in opposite order.

When all is put back together, top off coolant and leave radiator cap off for now.

Start the car, turn on defroster on high,and hot.

Allow car to reach operating temp.( about 180 deg.)While checking thermostat area for leaks.

When coolant starts moving aggressively then thermostat has opened and you can top off coolant again if necessary.

Replace radiator cap.

Drive away happy. This should take no more then about 1hr.

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14y ago
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Q: How do you replace a thermostat on a 1993 Toyota tercel?
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