11 53 000 Removing and installing/replacing coolant thermostat (N63)

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WARNING: Danger of scalding!

Only perform this work after engine has cooled down.

Recycling:

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste-disposal regulations.

Necessary preliminary tasks:

Drain coolant . See 17 00 008 DRAINING AND ADDING COOLANT IN RADIATOR (N62TU, N63) .
Remove FAN COWL with electric fan.
Remove INTERCOOLER EXPANSION TANK .
Remove coolant pump .

Follow instructions for working on cooling system. See 17 00... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM .

Release plug connector (1) and pull off.

Unlock and detach coolant hose (2).

Unfasten nut.

Release screws.

Tightening torque 11 53 1AZ, see THERMOSTAT AND CONNECTIONS

Remove coolant thermostat (3).

Fig 1: Identifying Coolant Thermostat And Hose With Plug Connector

Courtesy of BMW OF NORTH AMERICA, INC.

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

Clean sealing surfaces.

Installation:

Replace sealing ring (1) .

Fig 2: Identifying Coolant Thermostat Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up coolant .

Vent cooling system and check for water leaks.