Phase 4

WARNING: This page is about a different variant/trim than selected.

At about (194°F) 90°C, the thermostat opens and the coolant is routed through the radiator. However, the thermostat opening temperature is partially variable via the coolant bypass solenoid valve. The temperature around the thermostat and its expansion element is the total of the coolant temperatures entering the thermostat housing. Targeted actuation of the coolant bypass solenoid valve allows increased flow of coolant from the engine block to contact the thermostat element and allows an actual coolant temperature of between (194°F) 90°C and (212°F) 100°C to be set. During part throttle driving, fuel consumption depends heavily on coolant temperature. Closing of the coolant bypass solenoid valve makes it possible to drive with a higher coolant temperature during part throttle conditions.