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

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. 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, refer to 17 00 ... INSTRUCTIONS FOR WORKING ON COOLING SYSTEM. .

Remove front underbody protection.

Remove coolant drain plug on radiator. Drain and dispose of coolant.

Unlock plug (1) and remove.

Unlock and detach water hose (2).

Unfasten nut.

Release screws and remove coolant thermostat (3).

Fig 1: Releasing Screws And Removing 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 2: Replacing Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Top up coolant17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62) .

Vent cooling system and check for leaks. Refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS .