11 53 000 Removing and installing / replacing coolant thermostat (COOPER S)

Work on the cooling system should only be carried out when the engine has cooled down.

Remove coolant pressure cap from expansion tank.

Remove intake filter housing. Refer to 13 71 000 REMOVING AND INSTALLING INTAKE FILTER HOUSING (COOPER S) .

Drain coolant. Refer to 17 00 005 DRAINING AND ADDING COOLANT (COOPER S) .

Remove MAP sensor connector (1).

Fig 1: Removing Map Sensor Components

Courtesy of BMW OF NORTH AMERICA, INC.

Remove MAP sensor bracket bolts (2).

Tightening torque 11 12 2AZ. Refer to ENGINE - TIGHTENING TORQUES .

Remove heater hose (1).

Fig 2: Removing Thermostat Housing

Courtesy of BMW OF NORTH AMERICA, INC.

Remove top hose (2) from thermostat housing.

Remove retaining bolt (3) and remove thermostat housing (4).

Remove thermostat and gasket from housing.

Fig 3: Removing Thermostat And Gasket From Housing

Courtesy of BMW OF NORTH AMERICA, INC.

Note, location of bleeding pin (1).

Direction of installation (2).

Replace gasket and thermostat if necessary.

1. Thermostat to seal locating lugs.
2. Basic location of thermostat to seal lug.

Fig 4: Locating Thermostat To Seal Lugs

Courtesy of BMW OF NORTH AMERICA, INC.

Refill coolant. Refer to 17 00 005 DRAINING AND ADDING COOLANT (COOPER S) .