How To: Install Thermostat

Real quick pics of a thermostat change in a MKII T. There are only 2 bolts holding the thermostat in place, but there are some peripheral items that removal of will make the thermostat job much easier.

#1: Remove the oil filter

#2: Remove the Oil Dipstick Tube Retainer Bolt 12mm

#3: Remove the 2 10mm Thermostat Housing bolts with a 10mm End Wrench

#4: Remove the old thermostat and replace with new one and new o-ring that slips around it’s edges. Place the jiggle valve facing the notch in the Thermostat Housing, and reinstall everything you undid in the reverse order.

#5: Fill the overflow tank with water, and fill the Pressure Cap hole with 50/50 Water and Coolant. Start car up, check for leaks, start car again and let it idle for 3 minutes, check for leaks and air escaping coolant system. If none, let the car warm up, check again, then take a short drive. Watch temps carefully for a few days.. All done.

This documentation in no way replaces the Toyota MR2 Repair Manuals. The purpose of this content is only to provide supplementary information to fellow MR2 enthusiasts. Midship Runabout and its contributing authors will not be held responsible for any injury or damages that may occur as the result of practicing any of the methods or procedures described within this website. Article and photo submissions are property of the contributing author.

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