Heater Control Valve: Service and Repair

64 11 273 Replacing water valve for heater (N63)

Special tools required:







WARNING:
Scalding hazard.
Work on the cooling system may only be carried out when it has cooled down.







NOTE: Clamp off coolant hoses on water valve.







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







Necessary preliminary tasks:
- Remove left intake filter housing
- Remove left suspension cross-brace







NOTE: For purposes of clarity, graphic shows engine removed.

Release hose clips (1) with special tool 17 2 050 and remove coolant hoses.
Disconnect plug connection (2).
Pull water valve (3) upwards out of holders.

Installation:
Do not mix up connections of coolant hoses.
Replace damaged coolant hoses.







Installation:
Make sure rubber mount (1) and guide lug (2) are securely seated in holders (3) on wheel arch body.







After installation:
- Fill and vent cooling system and check for leaks