11 53 000 Removing and installing/replacing coolant thermostat (N54, N54T)

WARNING: Risk of scalding!

Only perform these tasks on an engine that has cooled down.

Danger of injury!

Risk of skidding due to coolant on the floor.

Recycling

Catch and dispose of drained coolant in a suitable collecting vessel.

Observe country-specific waste disposal regulations.

IMPORTANT: Read and comply with GENERAL NOTES .

Protect plug connections against coolant and dirt contamination.

Cover plug connections with suitable materials.

Necessary preliminary work:

Release screws (1) (only on front axle support)

Tightening torque 17 10 5AZ .

Fig 1: Identifying Screws On Front Axle Support

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Illustration shows coolant thermostat removed.

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

Fig 2: Locating Coolant Hoses On Thermostat

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 11 53 1AZ .

Fig 3: Identifying Hose, Hose Clamp And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of cooling system.