11 53 000 Removing and installing/replacing coolant thermostat (N55)

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 tasks

Remove front underbody protection . See 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION or 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION (AWD) .
E70, E71 :
Remove reinforcement plate.
E82, E84, E88, E90, E91, E92, E93, F25 :
Remove CHARGE AIR COOLER .
Remove fan cowl. See 17 11 035 REMOVE AND INSTALL OR REPLACE THE FAN COWL WITH ELECTRIC FAN (N53, N54, N54T, N55) .
Place oil drip tray for coolant under engine compartment.

NOTE: Illustration shows coolant thermostat removed.

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

Fig 1: Locating Coolant Hoses On Thermostat With Clamping Tongs

G09846176

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 .

Remove coolant thermostat (7).

Fig 2: Identifying Coolant Hose, Hose Clamp And Screws

G09846177

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Illustration shows coolant thermostat removed.

Assemble engine.

FILL THE COOLING SYSTEM .

Observe CAPACITIES .

Installation note:

Check coolant hoses for cracks and damage.

Renew coolant hoses as required.

Recommendation:

On vehicles older than five years, renew coolant hoses.

Check function of cooling system.