How to test and replace a thermostat?

The thermostat should be removed. For the purpose of testing, the thermostat needs to be put in water slowly raised to boiling temperature-if the valve fails to open when it reaches the exact point, then a new one is needed. Observe the water temperature at which the valve pops and compare with this designated popping temperature. The thermostat should be replaced if it does not open at its rated temperature.

How do you remove and install the thermostat in a Toyota MR2?

First of all, disconnect the hose from the air bleeder valve. To remove the thermostat, disconnect the small rubber hose from the air bleeder valve and remove the housing bolts. Remove both bolts and separate the water inlet housing halves. Remove the thermostat. Be sure to install a new O-ring on the new thermostat. Installation is the reverse of removal.

Genuine Toyota MR2 Thermostat

Engine Coolant Thermostat

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3 Thermostats found

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Toyota MR2 Thermostat
Part Number: 90916-03075
- Manufacturer Note: *WAX 82-95
$27.16 MSRP: $37.96
You Save: $10.80 (29%)

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Fits the following Vehicles:
1990-1995 Toyota MR2 | 4 Cyl 2.0L, 4 Cyl 2.2L | 3SGTE, 5SFE; 3SGTE, 5SFE; SW20L-ACMZZA, SW20L-AJMZZA, SW20L-AJMZZK, SW21L-ACMZKA, SW21L-ACPZKA, SW21L-AJMZKA, SW21L-AJMZKK, SW21L-AJPZKA
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Toyota MR2 Thermostat
Part Number: 90916-03046
- Replaces: 90916-03069
$24.30 MSRP: $33.96
You Save: $9.66 (29%)

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Fits the following Vehicles:
1985-1988 Toyota MR2 | GT | 4 Cyl 1.6L | 4AGELC; 4AGELC; AW11L-WCMQFA, AW11L-WCMQFK, AW11L-WCPQFA, AW11L-WCPQFK, AW11L-WJMQFA, AW11L-WJMQFK, AW11L-WJPQFA
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Toyota MR2 Thermostat
Part Number: 90916-03060
- Manufacturer Note: *WAX 82-95
- Replaced by: 90916-03090
$27.38 MSRP: $38.27
You Save: $10.89 (29%)

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More Info
Fits the following Vehicles:
1987-1989 Toyota MR2 | GT, Super Charger | 4 Cyl 1.6L | 4AGELC, 4AGZE; 4AGELC, 4AGZE; AW11L-WCMQFA, AW11L-WCMQFK, AW11L-WCPQFA, AW11L-WCPQFK, AW11L-WJMQFA, AW11L-WJMQFK, AW11L-WJMQRA, AW11L-WJMQRK, AW11L-WJPQFA, AW11L-WJPQRA
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Toyota MR2 Thermostat Parts Questions & Answers

Thermostat
90916-03060
Q: How to test and replace a thermostat?
A: The thermostat should be removed. For the purpose of testing, the thermostat needs to be put in water slowly raised to boiling temperature-if the valve fails to open when it reaches the exact point, then a new one is needed. Observe the water temperature at which the valve pops and compare with this designated popping temperature. The thermostat should be replaced if it does not open at its rated temperature.
Thermostat
90916-03046
Q: How do you remove and install the thermostat in a Toyota MR2?
A: First of all, disconnect the hose from the air bleeder valve. To remove the thermostat, disconnect the small rubber hose from the air bleeder valve and remove the housing bolts. Remove both bolts and separate the water inlet housing halves. Remove the thermostat. Be sure to install a new O-ring on the new thermostat. Installation is the reverse of removal.

Related Toyota MR2 Parts

About Toyota MR2 Thermostat

Everything installed in your Toyota MR2 vehicle needs to be kept in good working condition. The online catalog we provide will get you through the ordering process safely and securely. All genuine Toyota Thermostat from us are shipped directly from authorized Toyota Dealer. If you want search for MR2 Thermostat fast and easily, we assure you that you get to opt for one in less the time.

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