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
EmissionsEngine Coolant Leakage Inspection
WARNING:
Never remove the cooling system cap or loosen the radiator drain plug while
the engine is running, or when the engine and radiator are hot. Scalding engine
coolant and steam may shoot out and cause serious injury. It may also damage
the engine and cooling system.
Tu ...
Throttle Body
Purpose, Function
Opens/closes the throttle valve to adjust the amount of air supplied to the
cylinder.
Opens/closes the throttle valve according to the control signal from the
PCM.
Construction
The throttle body is installed to the intake manifold.
Th ...
Generator Removal/Installation [Skyactiv G 2.0]
WARNING:
Remove and install all parts when the engine is cold, otherwise they can
cause severe burns or serious injury.
When the battery cables are connected, touching the vehicle body with generator
terminal B will generate sparks. This can cause personal injury, fire, and ...