11 53 000 Removing and installing/replacing coolant thermostat (M57T2)

Necessary preliminary tasks:

Recycling:

Catch and dispose of coolant in a suitable container.

Observe country-specific waste-disposal regulations.

Lever out lock (1)

Lever out lock (2) and detach coolant hose.

Release screws (3).

Carefully remove thermostat housing to one side.

Risk of damage to coolant pipe (1).

Fig 1: Identifying Coolant Hose Locks And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The coolant thermostat is integrated in the coolant thermostat housing and can only be replaced as a complete unit.

Installation

Clean sealing surfaces.

Replace seal (1).

Fig 2: Identifying Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.