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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
G06925550Courtesy of BMW OF NORTH AMERICA, INC.
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