Heater Control Valve: Service and Repair

Replacing Water Valve For Heater

M43TU, M52TU, M54, S54, N42 only:
Remove intake filter housing.

M47 only:
Remove acoustic cover at front with intake snorkel.


WARNING:
Danger of scalding!
Only perform this work after engine has cooled down.







M471U only:
Disconnect plug connections (1).
Release hose clamps (2) and detach water hoses.
Lift out water valve for heater (3).

Installation Note: If necessary, replace rubber mount.

All except M47TU:







Water valve for heater with auxiliary water pump:
Disconnect plug connections (1).
Release hose clamps (2) and detach water hoses.
Lift out water valve for heater (3).

Installation Note: If necessary, replace rubber mount.







Water valve for heater without auxiliary water pump:
Disconnect plug connection (1).
Release hose clamps (2) and detach water hoses.
Withdraw heater valve for heater (3) in direction of arrow from bracket (4).

Installation Note: If necessary replace rubber mount.

All:

Installation: Fill and vent cooling system.