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

WARNING: This page is about a different variant/trim than selected.

WARNING: Risk of scalding!
Only perform these tasks on an engine that has cooled down.
Danger of injury!
Risk of slipping due to coolant on the floor.

Recycling:

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste disposal regulations.

IMPORTANT: Read and comply with GENERAL NOTES .
Protect plug connections against coolant and contamination.
Cover plug connections with suitable materials.

Necessary preliminary tasks:

Remove FAN COWL
Remove front UNDERBODY PROTECTION
Release ANTI-ROLL BAR on front axle

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

Tightening torque 17 10 5AZ .

Fig 1: Identifying Front Axle Support Screws

G06904422

NOTE: Illustration shows coolant thermostat removed.

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

Fig 2: Locating Thermostat Coolant Hoses

G06904423

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 Coolant Thermostat Hose Clamps, Coolant Hoses, Plug Connection And Screws

G06904424

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.