Alternator: Service and Repair

12 31 020 Removing And Installing/Replacing Alternator (M62)

Switch off ignition.
Follow instructions for disconnecting and connecting battery.
Disconnect and cover battery negative lead.

WARNING:
Danger of scalding!
Only perform these tasks on an engine that has cooled down.


Remove alternator drive belt. 11 28 010 Replacing Alternator Drive Belt
Remove fan cowl.
Drain coolant.






Release bolts (1) on alternator.






Release nut (1).
Disconnect battery positive lead (2) from alternator.
Disconnect plug (3).
Release screw (4) and remove roller.
Release screws (5) on alternator.

Recycling
A residual quantity of coolant emerges when the alternator is removed from the housing.
Catch and dispose of escaping coolant.
Observe country-specific waste-disposal regulations.






Pull out alternator towards front.

Installation:
Replace sealing ring (1) on alternator.

NOTE:
If necessary, replace alternator belt pulley.
Top up coolant.
Vent cooling system and check for leaks.