11 53 000 Removing and installing or replacing the coolant thermostat (N47D20 K/U/O/T 1)

Necessary preliminary tasks: 

• Drain COOLANT .
• Remove clean air pipe  . See 13 71 150 REMOVING CLEAN AIR PIPE (N47 D16/20 K/U/O/T 1) or 13 71 150 REMOVING CLEAN AIR PIPE (N47 D20 O 1 WITH SCR) .

Disconnect coolant hoses on thermostat.

Release screws (1) on thermostat housing.

Remove thermostat housing (2).

Installation note: 

Replace gasket.

Installation note: 

Replace gasket (1).

Assemble engine.

FILL and bleed cooling system.