64 11 208 Replacing Heater Core

64 11 208 Replacing Heat Exchanger

Special tools required:







Necessary preliminary work:
- Remove instrument panel trim
- Remove left/rear suspension cross-brace.
- Remove bulkhead upper section sound insulation







Recycling
Coolant emerges when coolant lines are detached. Have a suitable collecting vessel ready.
Catch and dispose of escaping coolant.
Observe country-specific waste disposal regulations.







IMPORTANT:
Connections must not be mixed up.
Mark connection sequence of coolant hoses prior to removal.

Release hose clamps (1) 17 2 050 with special tool 2 and detach water hoses.







IMPORTANT:
Carefully blow out coolant ports on the heat exchanger to remove the remaining coolant.
Close openings or line to heat exchanger with special tool 32 1 270, to avoid media leak and dirt contamination.







Release screws (1).

Installation note:
Replace screws.
Remove cable guide holder (2) from the working area.







NOTE: For purposes of clarity, picture shows heating and air-conditioning unit removed.

Unclip deflection arm (1) from angle positioning lever (2).

Installation note:
Deflection arm (1) must snap audibly into place.







Release screws (1).
Unlock and disconnect plug connections on upper distributor housing (2).
Remove upper distributor housing (2).

Installation note:
Make sure filter housing guide lugs (3) are correctly seated in associated guide tabs on upper distributor housing (2).







Unclip pipe clamps(1).

IMPORTANT:
Risk of contamination.
Escaping coolant must not get into the passenger compartment.

Remove water pipes (2).
Remove heat exchanger in direction of arrow.

Installation note:
Replace sealing rings.
Use special tool 00 9 030 to install sealing rings without damaging them.







After installation:
Bleed and fill cooling system.