Purpose, Function
When the engine coolant temperature is low, the thermostat blocks the engine coolant passage between the radiator and engine. As a result, because engine coolant cycles without passing through the radiator, warming is promoted.
Construction
The thermostat is installed to the rear part of the cylinder head.

The thermostat has the following parts:

Operation
1. When the engine coolant temperature decreases, the thermostat valve closes and engine coolant circulates without passing through the radiator.

2. When the engine coolant temperature is 80.5—83.5°C, the thermostat valve starts to open and the engine coolant passed through the radiator flows to the engine.

Thermostat Removal/Installation
EmissionsClutch Release Collar Inspection [C66 M R]
CAUTION:
Do not clean the clutch release collar with cleaning fluids or a steam cleaner
because it is filled with grease.
Operation Inspection
1. Turn the collar while applying force in the axial direction, and inspect for
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...
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Symbol Mark
Removal Procedure
CAUTION:
Remove the curtain air bag module to prevent damage before servicing.
Front-side
Rear-side
CAUTION:
Avoid cutting with a blowtorch or similar tools as the insulator (shaded
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1. Rough cut the ...
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WARNING:
Always keep sparks and flames away from fuel when servicing the fuel system.
Fuel can be easily ignited which could cause serious injury or death, and damage
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Fuel line spills and leakage from the pressurized fuel system are dangerous.
Fuel can ignite a ...