Engine Cooling
The S62 coolant flows from the water pump into the block. From here it passes through the heat exchanger and cylinder heads. The coolant cross flows through the cylinder heads.
The coolant returns from the heat exchanger and two return pipes from the cylinder heads back into the thermostat housing. Vehicle heating is also taken from the coolant return pipes in the "V" of the block and returns back into the water pump housing.
The S62 engine uses a conventionally heated thermostat (2) that opens at 79° C and is mounted on top of the waterpump housing.