Heater Control Valve: Service and Repair

64 11 273 - Replacing water valve for heater





Warning!
Danger of scalding! Work on the cooling system should only be carried out when the engine has cooled down.
Follow instructions 17 00 ... Instructions For Working on Cooling System for working on cooling system!





Note:
Disconnect coolant hoses on water valve.





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





Necessary preliminary tasks:
- Release oil reservoir from bracket and place to one side





Disconnect plug connection (1).
Release hose clamps (2) and remove hoses.
Remove water valve (3) from mounting (4).






Installation Note:
To avoid the buildup of noise, make sure that the rubber mounts on the water valve are securely seated in the mounting (2) on the frame side member.





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