11 53 000 Removing and installing/replacing coolant thermostat (N62)

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger of scalding!
Only perform these tasks on an engine that has cooled down.

Recycling:

Catch and dispose of drained coolant.

Observe country-specific waste-disposal regulations.

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

Remove FRONT UNDERBODY PROTECTION .

Disconnect coolant hoses (arrows) from thermostat using grips.

Fig 1: Identifying Coolant Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug (1) and remove.

Unlock and detach water hose (2).

Unfasten nut.

Release screws and remove coolant thermostat (3).

Fig 2: Identifying Plug, Water Hose And Coolant Thermostat

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Coolant thermostat is integrated in cover and can only be replaced as a complete unit.

Clean sealing surfaces.

Replace sealing ring (1).

Fig 3: Identifying Sealing Ring

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Installation:

Top up coolant.

Vent cooling system and check for leaks. See 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62, N62TU) .