BMW Cars 1999-06

Removal & Installation

Print

  1. Disconnect the negative battery cable. Drain coolant from the cooling system. Remove the center console.
  2.  
  3. Remove the mounting bolts and remove the right core mounting bracket. Lift out the front blower motor on the 7 Series.
  4.  
  5. Remove the core cover screws. Loosen the wire straps and clips and remove the cover.
  6.  
  7. Disconnect the temperature sensor(s).
  8.  
  9. Unscrew the mounting bolts and lift out the heater pipes. Replace the O-rings. Then, lift out the core from the right side.
  10.  

To install:

  1. Install the core in from the right side. Install the heater pipes with new O-rings, then tighten the mounting bolts.
  2.  
  3. Attach the wiring connector to the temperature sensor(s).
  4.  
  5. The remaining components are installed in the reverse order from which they were removed.
  6.  
  7. Fill the engine with the correct amount and mixture of antifreeze and water. Connect the negative battery cable, then start the engine and check for coolant leaks.
  8.  

3 Series




NOTE
The heater case assembly must be removed to remove the heater core on all 3-Series vehicles.

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Discharge and recover the air conditioning system refrigerant.
  6.  
  7. Remove or disconnect the following:

    Remove the heater bulkhead from the engine compartment
     


    Click image to see an enlarged view

    Fig. Heater bulkhead retaining screws

    Release hose clamps and detach the water hoses
     
    Release heater case screws on the firewall
     


    Click image to see an enlarged view

    Fig. Heater case retaining screws

    Steering wheel and column switches
     

  8.  


CAUTION
When removing the steering wheel on airbag equipped vehicles, use extreme caution handling the airbag assembly. Store the airbag with the airbag facing up, to avid injury in case of accidental deployment. Replace damaged airbag assemblies. Do not try to repair or reuse deployed airbag assemblies.



Center console retaining screws
 
All electrical leads and remove the console
 
Open the glove box and remove the glove box door assembly
 
Instrument panel trim
 
Left and right -A- pillar trim
 
Headlight switch assembly
 
Instrument cluster
 
Radio assembly and the radio trim
 
Ventilation control head
 
Passenger side airbag
 
Left and right defroster vents
 
Upper instrument panel retaining screws and pull the instrument panel away from the firewall
 
All electrical multi-plugs and pull the instrument panel out of the vehicle
 
Steering column fasteners and lower the column
 
Remove the fasteners from the right and left sides of the instrument panel reinforcement
 
Right and left head airbag assemblies if equipped
 


Click image to see an enlarged view

Fig. Instrument panel reinforcement side fasteners and head airbag assembly

Electrical leads from the heater
 
Right and left center console reinforcements
 
Cut the cable ties from the fusebox. Release the locks and pivot assembly downwards
 
Fusebox and the transverse reinforcement
 
Heater case retaining bolts and heater case assembly from the vehicle
 
Remove the core from the case assembly
 

To install:

  1. Install or connect the following:

    Heater core into the case. Make sure the gasket is positioned properly.
     
    Heater case in position in the vehicle
     
    Fusebox and the transverse reinforcement
     
    Pivot fusebox assembly upwards and engage locks. Install new cable ties
     
    Right and left center console reinforcements
     
    Electrical leads from the heater
     
    Right and left head airbag assemblies if equipped
     
    Right and left side fasteners of the instrument panel reinforcement
     
    Raise the steering column and install new fasteners
     
    All instrument panel electrical multi-plugs and the instrument panel into the vehicle
     
    Left and right defroster vents
     
    Passenger side airbag
     
    Ventilation control head
     
    Radio assembly and the radio trim
     
    Instrument cluster
     
    Headlight switch assembly
     
    Left and right -A- pillar trim
     
    Instrument panel trim
     
    The glove box door assembly
     
    Center console
     
    Column switches and steering wheel
     
    Heater case screws on the firewall
     
    Water hoses and clamps
     
    The heater bulkhead in the engine compartment
     

  2.  
  3. Refill the cooling system.
  4.  
  5. Evacuate, charge and leak test the air conditioning system.
  6.  
  7. Connect the negative battery cable.
  8.  
  9. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  10.  

3-Series




NOTE
The heater case assembly must be removed to remove the heater core on all 3-Series vehicles.

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Discharge and recover the air conditioning system refrigerant.
  6.  
  7. Remove or disconnect the following:
    CAUTION
    When removing the steering wheel on airbag equipped vehicles, use extreme caution handling the airbag assembly. Store the airbag with the airbag facing up, to avid injury in case of accidental deployment. Replace damaged airbag assemblies. Do not try to repair or reuse deployed airbag assemblies.



    Remove the heater bulkhead from the engine compartment

    Click image to see an enlarged view

    Fig. Heater bulkhead retaining screws

     
    Release hose clamps and detach the water hoses
     
    Release heater case screws on the firewall

    Click image to see an enlarged view

    Fig. Heater case retaining screws

     
    Steering wheel and column switches
     



    Center console retaining screws
     
    All electrical leads and remove the console
     
    Open the glove box and remove the glove box door assembly
     
    Instrument panel trim
     
    Left and right -A- pillar trim
     
    Headlight switch assembly
     
    Instrument cluster
     
    Radio assembly and the radio trim
     
    Ventilation control head
     
    Passenger side airbag
     
    Left and right defroster vents
     
    Upper instrument panel retaining screws and pull the instrument panel away from the firewall
     
    All electrical multi-plugs and pull the instrument panel out of the vehicle
     
    Steering column fasteners and lower the column
     
    Remove the fasteners from the right and left sides of the instrument panel reinforcement
     
    Right and left head airbag assemblies if equipped

    Click image to see an enlarged view

    Fig. Instrument panel reinforcement side fasteners and head airbag assembly

     
    Electrical leads from the heater
     
    Right and left center console reinforcements
     
    Cut the cable ties from the fusebox. Release the locks and pivot assembly downwards
     
    Fusebox and the transverse reinforcement
     
    Heater case retaining bolts and heater case assembly from the vehicle
     
    Remove the core from the case assembly
     

  8.  

To install:

  1. Install or connect the following:

    Heater core into the case. Make sure the gasket is positioned properly.
     
    Heater case in position in the vehicle
     
    Fusebox and the transverse reinforcement
     
    Pivot fusebox assembly upwards and engage locks. Install new cable ties
     
    Right and left center console reinforcements
     
    Electrical leads from the heater
     
    Right and left head airbag assemblies if equipped
     
    Right and left side fasteners of the instrument panel reinforcement
     
    Raise the steering column and install new fasteners
     
    All instrument panel electrical multi-plugs and the instrument panel into the vehicle
     
    Left and right defroster vents
     
    Passenger side airbag
     
    Ventilation control head
     
    Radio assembly and the radio trim
     
    Instrument cluster
     
    Headlight switch assembly
     
    Left and right -A- pillar trim
     
    Instrument panel trim
     
    The glove box door assembly
     
    Center console
     
    Column switches and steering wheel
     
    Heater case screws on the firewall
     
    Water hoses and clamps
     
    The heater bulkhead in the engine compartment
     

  2.  
  3. Refill the cooling system.
  4.  
  5. Evacuate, charge and leak test the air conditioning system.
  6.  
  7. Connect the negative battery cable.
  8.  
  9. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  10.  

Removal And Installation

NOTE
The heater case assembly must be removed to remove the heater core on all 3-Series vehicles.

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Discharge and recover the air conditioning system refrigerant.
  6.  
  7. If equipped with an automatic transmission, remove the screw retaining the shift lever T-handle. On manual transmission equipped vehicles, remove the shifter knob.
  8.  
  9. Remove or disconnect the following:
    CAUTION
    When removing the steering wheel on airbag equipped vehicles, use extreme caution handling the airbag assembly. Store the airbag with the airbag facing up, to avid injury in case of accidental deployment. Replace damaged airbag assemblies. Do not try to repair or reuse deployed airbag assemblies.



    Shift lever cover and pull the window switches out of the console
     
    Center console retaining screws, disconnect all electrical leads and remove the console
     
    Open the glove box and remove the glove box door assembly
     
    Left and right -A- pillar trim. Remove the left and right kick panel trim
     
    Lower instrument panel trim pads. Remove the steering wheel
     



    Steering column trim
     
    Instrument panel -A- pillar retaining bolts. Remove the lower instrument panel retaining bolts at the kick panels
     
    Instrument cluster retaining screws and remove the instrument cluster. Disconnect all instrument cluster electrical leads
     
    Radio assembly and the radio trim
     
    Ventilation control head
     
    Upper instrument panel retaining screws and pull the instrument panel away from the firewall
     
    All electrical multi-plugs and pull the instrument panel out of the vehicle
     
    Refrigerant lines from the evaporator
     
    Cowl cover from in the engine compartment. Disconnect the coolant lines from the heater core
     
    Electrical leads from the blower
     
    Air ducts from the heater case
     
    Heater case retaining bolts from the engine compartment side and the retaining bolts from the interior side
     
    Heater case assembly from the vehicle
     
    Clips retaining the case halves and remove the blower motor cover and motor
     
    Heater core form the case

    Click image to see an enlarged view

    Fig. Exploded view of the heater/blower housing assembly-3-Series



    Click image to see an enlarged view

    Fig.

     

  10.  
  11. Install or connect the following:

    Heater core into the case. Make sure the gasket is positioned properly.
     
    Assemble the case halves and attach the blower cover. Install the blower
     
    Heater case in position in the vehicle. Attach the air ducts
     
    Refrigerant lines and coolant hoses. Connect the electrical leads
     
    Reposition the instrument panel into the vehicle and connect the electrical multi-plugs. Be sure the instrument panel is properly positioned and install all retaining bolts
     
    Ventilation control head, the radio and the glove box assembly
     
    A pillar trim and the kick panel trim plates
     
    Lower instrument panel trim pieces
     
    Steering column trim and the steering wheel
     
    Center console and the shift lever cover. Install the shifter knob or handle
     

  12.  
  13. Refill the cooling system.
  14.  
  15. Evacuate, charge and leak test the air conditioning system.
  16.  
  17. Connect the negative battery cable.
  18.  
  19. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  20.  

5 & 7 Series



2001-03 5 Series And 2001 7 Series
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Remove or disconnect the following:

    Screws retaining the center console
     
    Ashtray assembly
     
    Glove box door assembly
     
    Right side heater case cover screws and remove the cover
     
    Front vent drive motor
     
    Plug from the inside temperature sensor
     
    Heater core cover retaining screws
     
    Cover clips and straps
     
    Cover and gasket
     
    Coolant hoses from the heater core
     
    Heater pipe-to-heater core retaining bolts
     
    Heater pipes
     
    Heater core retaining bolts
     
    Heater core by tilting it to the side
     

  6.  


    Click image to see an enlarged view

    Fig. View of the heater/blower housing assembly



    Click image to see an enlarged view

    Fig. Removing the heater core cover



    Click image to see an enlarged view

    Fig. Removing the heater water pipes



    Click image to see an enlarged view

    Fig. Remove the heater by pulling to the right


To install:

  1. Install or connect the following:

    Heater core in the heater case
     
    Heater core retaining bolts
     
    Heater pipes to the heater core. Tighten the M6 bolts to 72-84 inch lbs. (8.1-9.5 Nm) and the M8 bolts to 16-17 ft. lbs. (21.7-23.0 Nm). Connect the heater hoses. Always use new O-rings on the heater pipes.
     
    Heater case cover and retaining clips
     
    Cover retaining screws. Make sure the cover gasket is properly positioned.
     
    Front vent drive motor
     
    Right heater case cover
     
    Inside temperature sensor
     
    Glove box door assembly
     
    Center console and the ashtray
     

  2.  
  3. Refill the cooling system and connect the negative battery cable.
  4.  
  5. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  6.  

Except 2001-03 5 Series And 7 Series
  1. Disconnect the negative battery cable.
  2.  
  3. Discharge and recover the air conditioning system refrigerant.
  4.  
  5. Drain the cooling system into a clean container for reuse.
  6.  
  7. Remove or disconnect the following:
  8.  
  9. Move the front seats completely back
  10.  
  11. Move steering column into the lower and extended position

    Pillar trim
     
    Instrument cluster
     
    Headlight switch
     
    On-board monitor assembly
     
    Trim panel above the pedal assembly
     
    Glovebox and instrument panel trim
     
    Center speaker connection
     
    Solar sensor connection
     
    Fasteners securing the instrument panel
     
    Instrument panel
     


    Click image to see an enlarged view

    Fig. Remove the center speaker connector (1), instrument panel fasteners (2, 3), then pull the instrument panel (4) back

    A/C and coolant lines from the heater case
     
    Fasteners securing the heater case
     
    Heater case assembly
     
    Heater core cover from the case
     
    Coolant pipe retainers and pipes from the core
     


    Click image to see an enlarged view

    Fig. Remove retainers (1) and coolant pipes (2) from the core (3)

    Heater core
     

  12.  

To install:

  1. Install or connect the following:

    Heater core in the heater case
     
    Coolant pipes
     
    Heater core cover
     
    Heater case assembly and fasteners
     
    A/C and coolant lines and fasteners
     
    Instrument panel and fasteners
     
    Solar sensor connection
     
    Center speaker connection
     
    Glovebox and instrument panel trim
     
    Trim panel above the pedal assembly
     
    On-board monitor assembly
     
    Headlight switch
     
    Instrument cluster
     
    Pillar trim
     

  2.  
  3. Refill the cooling system and connect the negative battery cable.
  4.  
  5. Recharge the A/C system with refrigerant
  6.  
  7. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  8.  

5, 7 And 8-Series



Removal And Installation
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Remove or disconnect the following:

    Screws retaining the center console. Remove the ashtray assembly
     
    Glove box door assembly
     
    Right side heater case cover screws and remove the cover
     
    Front vent drive motor. Disconnect the plug from the inside temperature sensor
     
    Heater core cover retaining screws. Remove the cover clips and straps
     
    Cover and gasket. Disconnect the coolant hoses from the heater core
     
    Heater pipe-to-heater core retaining bolts. Remove the heater pipes
     
    Heater core retaining bolts. Remove the heater core by tilting it to the side

    Click image to see an enlarged view

    Fig. View of the heater/blower housing assembly- 5, 7 and 8-Series



    Click image to see an enlarged view

    Fig. Removing the heater core cover- 5, 7 and 8-Series



    Click image to see an enlarged view

    Fig. Removing the heater water pipes- 5, 7 and 8-Series



    Click image to see an enlarged view

    Fig. Remove the heater by pulling to the right-5, 7 and 8-Series

     

  6.  

To install:

  1. Install or connect the following:

    Heater core in the heater case. Install the heater core retaining bolts
     
    Heater pipes to the heater core. Tighten the M6 bolts to 72-84 inch lbs. (8.1-9.5 Nm) and the M8 bolts to 16-17 ft. lbs. (21.7-23.0 Nm). Connect the heater hoses. Always use new O-rings on the heater pipes.
     
    Heater case cover and retaining clips. Install the cover retaining screws. Make sure the cover gasket is properly positioned
     
    Front vent drive motor. Install the right heater case cover
     
    Inside temperature sensor. Install the glove box door assembly
     
    Center console and the ashtray
     

  2.  
  3. Refill the cooling system and connect the negative battery cable.
  4.  
  5. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  6.  

5- & 7-Series



2001-03 5 Series & 2001 7 Series
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Remove or disconnect the following:

    Screws retaining the center console
     
    Ashtray assembly
     
    Glove box door assembly
     
    Right side heater case cover screws and remove the cover
     
    Front vent drive motor
     
    Plug from the inside temperature sensor
     
    Heater core cover retaining screws
     
    Cover clips and straps
     
    Cover and gasket
     
    Coolant hoses from the heater core
     
    Heater pipe-to-heater core retaining bolts
     
    Heater pipes
     
    Heater core retaining bolts
     
    Heater core by tilting it to the side

    Click image to see an enlarged view

    Fig. View of the heater/blower housing assembly



    Click image to see an enlarged view

    Fig. Removing the heater core cover



    Click image to see an enlarged view

    Fig. Removing the heater water pipes



    Click image to see an enlarged view

    Fig. Remove the heater by pulling to the right

     

  6.  

To install:

  1. Install or connect the following:

    Heater core in the heater case
     
    Heater core retaining bolts
     
    Heater pipes to the heater core. Tighten the M6 bolts to 72-84 inch lbs. (8.1-9.5 Nm) and the M8 bolts to 16-17 ft. lbs. (21.7-23.0 Nm). Connect the heater hoses. Always use new O-rings on the heater pipes.
     
    Heater case cover and retaining clips
     
    Cover retaining screws. Make sure the cover gasket is properly positioned.
     
    Front vent drive motor
     
    Right heater case cover
     
    Inside temperature sensor
     
    Glove box door assembly
     
    Center console and the ashtray
     

  2.  
  3. Refill the cooling system and connect the negative battery cable.
  4.  
  5. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  6.  

Except 2001-03 5 Series & 2001 7 Series
  1. Disconnect the negative battery cable.
  2.  
  3. Discharge and recover the air conditioning system refrigerant.
  4.  
  5. Drain the cooling system into a clean container for reuse.
  6.  
  7. Remove or disconnect the following:
  8.  
  9. Move the front seats completely back
  10.  
  11. Move steering column into the lower and extended position

    Pillar trim
     
    Instrument cluster
     
    Headlight switch
     
    On-board monitor assembly
     
    Trim panel above the pedal assembly
     
    Glovebox and instrument panel trim
     
    Center speaker connection
     
    Solar sensor connection
     
    Fasteners securing the instrument panel
     
    Instrument panel

    Click image to see an enlarged view

    Fig. Remove the center speaker connector (1), instrument panel fasteners (2, 3), then pull the instrument panel (4) back

     
    A/C and coolant lines from the heater case
     
    Fasteners securing the heater case
     
    Heater case assembly
     
    Heater core cover from the case
     
    Coolant pipe retainers and pipes from the core

    Click image to see an enlarged view

    Fig. Remove retainers (1) and coolant pipes (2) from the core (3)

     
    Heater core
     

  12.  

To install:

  1. Install or connect the following:

    Heater core in the heater case
     
    Coolant pipes
     
    Heater core cover
     
    Heater case assembly and fasteners
     
    A/C and coolant lines and fasteners
     
    Instrument panel and fasteners
     
    Solar sensor connection
     
    Center speaker connection
     
    Glovebox and instrument panel trim
     
    Trim panel above the pedal assembly
     
    On-board monitor assembly
     
    Headlight switch
     
    Instrument cluster
     
    Pillar trim
     

  2.  
  3. Refill the cooling system and connect the negative battery cable.
  4.  
  5. Recharge the A/C system with refrigerant
  6.  
  7. Operate the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  8.  

E30 Models



  1. Disconnect the negative battery terminal. Remove the center console and the driver's side instrument panel trim next to the steering column. Drain the coolant.
  2.  
  3. Loosen the coolant pipe clamp near the heater connection.
  4.  
  5. Remove the duct from the heater to the rear heating duct.
  6.  
  7. Place some rags or a small container under the heater connection to catch any spilled coolant. Remove the bolts from the heater connection and separate the joint.
  8.  
  9. Remove the heater core bolts and remove from the heater housing.
  10.  

To install:

  1. Replace the heater core into the heater housing and replace the bolts. Replace the O-rings on the heater pipe joint. Connect the pipe to the heater core and install the bolts.
  2.  
  3. Install the rear heating duct connection and the pipe holding clamp. Install the instrument panel trim and the center console. Fill the cooling system and bleed. Connect the negative battery terminal.
  4.  

E36 3 Models





Click image to see an enlarged view

Fig. Remove the nut to disconnect the water flange-E36 3 Series



Click image to see an enlarged view

Fig. Remove the nut and the O-rings from the flange-E36 3 Series



Click image to see an enlarged view

Fig. Remove the trim screws before disconnecting the lower trim-E36 3 Series



Click image to see an enlarged view

Fig. Remove the bolt to disconnect the flange at the heater core-E36 3 Series



Click image to see an enlarged view

Fig. Remove the screw to withdraw the heater core-E36 3 Series

  1. Turn the ignition switch to the OFF position. Remove the air intake cowl weather-stripping. Remove the grille by gently prying out.
  2.  
  3. Remove the 2 screws inside the air intake cowl holding the electrical duct.
  4.  
  5. Remove the 2 screws holding the right side of the air intake cowl and remove the screw holding the left side. Pull the cowl out from above. It may be very hard to remove, but it will come out.
  6.  
  7. Remove the nut from the heater connection and pull off the connection. Blow air into the intake hose to force the coolant out of the heater core. This will prevent coolant from dripping onto the carpeting.
  8.  
  9. Remove the nut from the connection in the engine compartment. Remove the screws from the left, lower instrument trim panel and pry off.
  10.  
  11. Remove the screw from the pipe connection at the heater core. Remove the heater core mounting nut and remove the heater core.
  12.  

To install:

  1. Replace the heater core and the mounting screw. Replace the O-rings on the pipe connection and install the mounting bolts.
  2.  
  3. Install the trim panel and screws. Install the nut on the engine compartment side of the pipe connection.
  4.  
  5. Replace the O-rings on the connection and install the flange and nut.
  6.  
  7. Install the air intake cowl and screws. Replace the electrical duct screws and the intake grill. Install the weather-stripping.
  8.  

 
label.common.footer.alt.autozoneLogo