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

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 BMW 745i, 2005 BMW 745Li, 2004 BMW 745i, 2004 BMW 745Li, and 2003 BMW 745i. 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.

Fig 1: Removing Coolant Thermostat

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and detach water hose (2).

Unfasten nut.

Release screws and remove coolant thermostat (3).

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

Clean sealing surfaces.

Fig 2: View Of Coolant Thermostat

Courtesy of BMW OF NORTH AMERICA, INC.

Replace sealing ring (1).

Installation:

Top up coolant. Vent cooling system and check for leaks. Refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (N62) .