Removing and Installing or Replacing Heater
64 11 206 - Removing and installing or replacing heater
Necessary preliminary tasks:
- Draw off refrigerant from A/C system Drawing off, Evacuating and Filling A/C System (R 134a)
- Remove instrument panel trim 51 45 030 Removing and Installing Instrument Panel Trim
- Remove temperature sensor for cold-air distributor Service and Repair
- Remove control unit for Car Access System Service and Repair
- In appropriate version:
- Remove head-up display Removing and Installing/Replacing Head-Up Display
Warning!
Cover protruding threaded pins, corner points and edges on support tube to prevent injuries.
Warning!
Follow instructions for working on cooling system Instructions for Working on Cooling System.
Unscrew nuts (1).
Installation:
Tightening torque 64 53 8AZ [1][2]Expansion Valve.
Detach refrigerant line (2) in direction of arrow.
Unclip refrigerant line (3).
Warning!
- When installing heater, make sure left and right air ducts are correctly seated.
- Check left and right air ducts for leaks.
- If necessary, reseal left and right air ducts with butylene tape (sourcing reference: BMW Parts Service).
- If left and right air ducts are resealed, make sure air flaps can move freely.
Feed out rubber grommet (1).
Installation:
Make sure rubber grommet (1) is correctly seated.
Release nut (2) and detach refrigerant lines (3) and (4) in direction of arrow.
Installation:
Tightening torque 64 53 7AZ [1][2]Expansion Valve.
Replace sealing rings.
Release nuts (5) on right air duct.
Installation:
Tightening torque 64 11 4AZ [1][2]Mechanical Specifications.
Feed out rubber grommet (1).
Installation:
Make sure rubber grommet (1) is correctly seated.
Release spring clamps (2) and detach coolant hoses (3).
Important!
Carefully blow through aluminum triple pipe to remove remaining coolant from heat exchanger for heating system.
Installation:
Vent cooling system and check for leaks.
Release nuts (4) on left air duct.
Installation:
Tightening torque 64 11 4AZ [1][2]Mechanical Specifications.
Remove soundproofing from left A-pillar (1) in direction of arrow.
Release screws (2).
Remove left air duct (4) in direction of cold-air distributor (3).
Remove soundproofing from right A-pillar (1) in direction of arrow.
Release screws (2).
Remove right air duct (4) in direction of cold-air distributor (3).
Carefully lever out locks (1) and (2).
Detach cold-air distributor (3) in direction of arrow.
Installation:
Make sure cold-air distributor (3) is correctly seated.
Important!
Follow instructions for handling optical fibers 61 00 ... Notes on Handling Optical Fibers.
Necessary preliminary tasks:
- Disconnect all necessary cable ties on support tube.
- Release wiring harnesses/cable ducts and lay to one side.
- If necessary, remove control units/disconnect plug connections.
Installation:
Make sure wiring harnesses/cable ducts are correctly routed and secured.
If necessary, remove CD changer (1) Removing and Installing/Replacing CD Changer.
Release screws (2).
Set fuse-carrier (3) down in footwell.
Feed out footwell heater ducts (1) and remove.
Release screws (2), tightening torque 51 71 15AZ Specifications.
Release screws (3), tightening torque 32 31 6AZ [1][2]Specifications.
Release nuts (4), tightening torque 51 71 15AZ Specifications.
Pull back support tube (5) and remove from vehicle with assistance of a second person.
If necessary, unlock and disconnect plug connections on heater (1).
Remove heater (1) in direction of arrow.
Installation:
Make sure heater (1) is correctly seated.
Installation:
Make sure condensate drain (1) is correctly seated in grommet (2) on both sides.