11 53 000 Removing and installing/replacing coolant thermostat (N12)

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 skidding due to coolant on the floor.

Recycling

Catch and dispose of drained coolant.

Observe country-specific waste disposal regulations.

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

Necessary preliminary work:

Drain COOLANT from radiator.

Release lock (1) on coolant pipe in direction of arrow.

Fig 1: Identifying Lock On Coolant Pipe

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Disconnect plug connection (1) on coolant thermostat.

Fig 2: Identifying Plug Connection On Coolant Thermostat

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Detach all coolant hoses from thermostat.

NOTE:

Release metal pipe clips using special tool 17 2 050 .

Disconnect plug connection (1) on coolant temperature sensor.

Slacken nut (2).

Release screws (3).

Tightening torque: 11 53 1AZ .

Fig 3: Identifying Plug Connection On Coolant Temperature Sensor With Screws

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Installation note:

Replace gasket (1).

Fig 4: Identifying Gasket

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Assemble engine.

FILL COOLING SYSTEM and check for tightness.