Heater Components; Heater Valve, Replacing - BMW 1999-2005 M3 Service Manual

Heating and Air Conditioning
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Heater Components

The heater valve is located in the left
side of the engine compartment,
attached to the left strut tower. The
solenoid operated valve controls
coolant flow through the heater core.
The IHKA housing, located underneath
the center of the dashboard, houses
the heater core, the A/C evaporator, the
heating and A/C blower and associated
sensors and air distribution motors.
CAUTION!
Removal of either the heater core or
the IHKA housing involves
dashboard removal. Before starting
work, disconnect the battery
negative (-) cable in the trunk. Be
sure to read the battery
disconnection cautions on page viii
and the airbag warnings in
Airbag System (SRS).

Heater valve, replacing

- Drain engine coolant. See
Radiator and Cooling
WARNING!
Allow the cooling system to cool
before opening or draining the
cooling system.
Disconnect hoses (A) and electrical
harness connector (B) at heater valve
on left inner fender.
Carefully pull heater valve out of
-
rubber mounting and pull up and
out of engine compartment.
640-5
721
170
System.
2/25/2009 11:17 PM