July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Coolant Circuit of the Heating System

The F01/F02 IHKA system is a coolant regulated system. The coolant circuit uses a double solenoid heater control valve to control the temperature of the heater core.

NOTE: The N63 engine uses a mechanical water pump.

Fig 1: Identifying Double Solenoid Valves, Return Pipe And Flow Pipes

Courtesy of BMW OF NORTH AMERICA, INC.