Heater Core, Replacing - BMW 1999-2005 M3 Service Manual

Heating and Air Conditioning
2 of 9
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Installation is reverse of removal.
-
Inspect hoses and rubber mounts.
Replace as necessary.
Use new hose clamps.
Tightening torque
Coolant hose
clamp
32 - 48 mm
(2 1/4 - 4 in.)

Heater core, replacing

Remove housing for interior ventilation
microfilter.
Remove upper cover and
microfilter.
Open wiring harness loom (A) and
remove wires.
Unfasten screws (B) and remove
lower housing.
- Remove center console and
dashboard. See
Trim.
Drain engine coolant. See
-
Radiator and Cooling
WARNING!
Allow the cooling system to cool
before opening or draining the
cooling system.
2.5 Nm (22 in-lb)
513 Interior
170
System.
2/25/2009 11:17 PM