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I would make an article out of this post, put I can only upload 5 pics at a time...
I have not performed this service procedure yet because I didn't keep my X5 long enough to need to. But the instructions are fairly simply and straight forward. You do seem to need 2 special BMW tools tho.
Here are the instructions via BMW TIS:
1. Remove the Fan Clutch and Fan Impeller (BMW has 2 special tools)
2. Remove the A/C Belt
3. Remove the Alternator Belt
4. Drain the coolant fron the enigne block
5. Release belt pulley
6. Release water pump
7. Tighten 2 M6 screws into the housing of the pump to extract/push the pump off the front of the engine.
8. Replace the 0-Ring and lube with coolant
The pictures are from the BMW TIS and valid for all inline 6 engines.
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