11 53 000 Removing And Installing/Replacing Coolant Thermostat (N54)

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

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:

Remove front underbody protection . See 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION .
Drain coolant . See 17 00 005 DRAINING AND ADDING COOLANT (N54) .

NOTE: Illustration shows coolant thermostat removed.

Disconnect coolant hoses (arrows) on the thermostat (1) with clamping tongs.

Fig 1: Locating Thermostat Coolant Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

Release hose clamp (1) and detach coolant hose.

Release hose clamp (2) and detach coolant hose.

Unlock and detach coolant hose (3).

Unlock and detach coolant hose (4).

Disconnect plug connection (5).

Release screws (6).

Tightening torque. See 11 53 1AZ in THERMOSTAT AND CONNECTIONS .

Remove coolant thermostat (7).

NOTE: Illustration shows coolant thermostat removed.

Fig 2: Identifying Hose Clamp And Coolant Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.