11 16 550 Removing and installing alternator bracket

Special tools required: 

• 11 4 470
• 2 408 958
• 17 0 102
• 17 0 101

Recycling: 

Catch and dispose of drained coolant.

Observe country-specific waste disposal regulations.

Necessary preliminary work: 

• Remove ALTERNATOR .
• Remove AIR CONDITIONING COMPRESSOR .
• Remove ALTERNATOR DRIVE BELT .
• Drain COOLANT .
• Remove HOLDER .

Removal: 

Release screw (1) on alternator bracket (2) from bottom.

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Unlock connector (1) and pull off.

Release clamp (2) and pull off coolant hose (3).

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Unlock coolant line (1) and pull off.

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Release screws (1).

Remove alternator support (2).

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Installation: 

Clean sealing surface (1) with special tool 11 4 470.

Check centering bush (2) for damage and replace if necessary.

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Check centering bush (1) for damage and replace if necessary.

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Installation note: 

If the sealing bead (1) protrudes slightly and if the sealing bead (1) is not damaged, the alternator support can be reinstalled.

If damaged: remove sealing bead (1) using suitable tool.

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Replacing the sealing bead (1) SEALANT 2 2  (Loctite 5970).

Sealant height approximately 2 to 2.5 mm.

Mount alternator support (2).

Tighten down screws (1).

Tightening torque 11 51 3AZ .

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Connect coolant line (1).

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Check for internal leakage from the coolant thermostat: 

Mount special tool 2 408 958 on the coolant thermostat.

Connect special tool 17 0 102 to special tool 2 408 958.

Using special tool (hand pump) 17 0 101 build up a pressure of 0.5 bar.

The pressure may fall to 0.1 bar.

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It is internally tight, when the pressure is maintained at 0.1 bar.

If no pressure can be built up, then the coolant thermostat is leaking internally.

The coolant thermostat must be removed again and reinstalled.

Then repeat the operation.

Remove all special tools.

Mount coolant hose (3) and secure with clamp (2).

Connect the connector (1).

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Attach screw (1) to alternator bracket (2).

Tightening torque 11 51 3AZ .

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Required reworking: 

• Install HOLDER .
• Install ALTERNATOR .
• Install the AIR CONDITIONING COMPRESSOR .
• Install drive belt for alternator .
• Top up COOLANT .