How to service the thermostat on Toyota Land Cruiser?

Service of the thermostat starts with draining the engine coolant. The removal of three nuts will disconnect the water inlet from its housing. Next remove the thermostat unit while discarding its gasket. Heat water in a tank and place the thermostat inside to check that it opens between 80 - 84 degrees Celsius (176 - 183 degrees Fahrenheit); replace the current thermostat if the value is incorrect. The inspection requires checking that the valve lift reaches 10 mm (0.39 inch) when water reaches 95 degrees Celsius (203 degrees Fahrenheit) while the thermostat requires complete closure when the temperature drops below 40 degrees Celsius(104 degrees Fahrenheit); if any specifications fail, the thermostat needs replacement. Place a new gasket on the thermostat before you insert it into the water inlet housing with the straight upward direction of the jiggle valve providing a 30 degrees deviation distance. Install the water inlet by tightening its three nuts to 19 Nm (195 kgf-cm, 14 ft. lbs.). Check the engine performance with new coolant in the system before examining coolant leaks while verifying correct engine coolant capacity.

OEM Toyota Land Cruiser Thermostat

Engine Coolant Thermostat

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Toyota Land Cruiser Thermostat
Part Number: 90916-03117
$32.85 MSRP: $45.72
You Save: $12.87 (29%)
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Product Specifications
- Manufacturer Note: *WAX 82-95
- Replaces: 90916-03094
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1993-1997 Toyota Land Cruiser | Base | 6 Cyl 4.5 L GAS
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Toyota Land Cruiser Thermostat
Part Number: 90916-03100
$26.40 MSRP: $36.75
You Save: $10.35 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Engine Coolant Thermostat
- Manufacturer Note: *WAX 82-95
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1998-2007 Toyota Land Cruiser | Base | 8 Cyl 4.7 L GAS
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Toyota Land Cruiser Thermostat
Part Number: 90916-03052
$46.23 MSRP: $64.36
You Save: $18.13 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Engine Coolant Thermostat
- Replaces: 90916-03071
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1984-1992 Toyota Land Cruiser | Base | 6 Cyl 4.0 L GAS, 6 Cyl 4.2 L GAS

Toyota Land Cruiser Thermostat

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The Toyota Land Cruiser cooling system is made of a Thermostat that is usually located close to the radiator of the automobile. Its main use is to control the temperature of the engine most often to maintain it within the most suitable range for highest performance. The thermostat acts as a negative feedback device of end-point control: with adjustable set point where heating or cooling devices can be turned on or off. Mechanical thermostats such as bimetallic strip or wax pellet and pneumatic thermostats controlling the temperature through air filled control tubes have been used in Land Cruiser vehicles over the years. It has been evidenced that, through the above developments in the thermostat pace, the Toyota Land Cruiser vehicles' efficiency and comfort have been enhanced.

Toyota Land Cruiser Thermostat Parts and Q&A

Thermostat
90916-03100
Q: How to service the thermostat on Toyota Land Cruiser?
A:
Service of the thermostat starts with draining the engine coolant. The removal of three nuts will disconnect the water inlet from its housing. Next remove the thermostat unit while discarding its gasket. Heat water in a tank and place the thermostat inside to check that it opens between 80 - 84 degrees Celsius (176 - 183 degrees Fahrenheit); replace the current thermostat if the value is incorrect. The inspection requires checking that the valve lift reaches 10 mm (0.39 inch) when water reaches 95 degrees Celsius (203 degrees Fahrenheit) while the thermostat requires complete closure when the temperature drops below 40 degrees Celsius(104 degrees Fahrenheit); if any specifications fail, the thermostat needs replacement. Place a new gasket on the thermostat before you insert it into the water inlet housing with the straight upward direction of the jiggle valve providing a 30 degrees deviation distance. Install the water inlet by tightening its three nuts to 19 Nm (195 kgf-cm, 14 ft. lbs.). Check the engine performance with new coolant in the system before examining coolant leaks while verifying correct engine coolant capacity.

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