Heater Core Coolant Pipe

Heater Core Coolant Pipe

Removing

- Remove the heater in order to replace the coolant pipes that run from the engine compartment to the heater core. Refer to=> [ Heater and A/C Unit ] Removal and Replacement.

- Remove the bolt- 1 - for the connection flange between the heater core connections.






Vehicles with Climatic

- Remove the temperature regulator door motor (V68).

Vehicles with Climatronic

- Remove the left temperature regulator door motor (V158). Refer to => [ Left Temperature Door Motor (V158) ] Left Temperature Door Motor (V158).

For all vehicles

- Remove the bolts - A - and the cover - B -.






- Open the clamps - A - and remove the coolant pipes from the heater core.






Installing

- Coat sealing rings - 1 - with coolant before installing.

- Install the seals - 1 - into the connection in the heater core.

• Ensure sealing rings are installed on the proper side, as shown in the illustration.

• If pipe clamps are deformed, replace them.

- Attach the coolant pipes to the heater core.






- Always replace the seals - 1 -. Coat sealing rings - 1 - with coolant before installing.

• If pipe clamps are deformed, replace them.

- Pipe clamps - A - must be able to be twisted slightly when installing onto the coolant pipes.






- Pipe clamps - A - must be installed as shown in the illustration.

- Tighten the pipe clamps - A - to 2 Nm.

- Make sure the clamps - A - are tight after tightening the screws. They must completely enclose the flange on the heater core and coolant pipe and must not come in contact with other components.






- Tighten the connection flange bolt - 1 - between the heater core connections to 2 Nm.

- Install the heater. Refer to=> [ Heater and A/C Unit ] Removal and Replacement.