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How to remove this big black pulley?

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Old 03-06-2017, 02:50 AM
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CLS55
How to remove this big black pulley?

What is the big black pulley on serpentine belt between sc/serp belt double idler and crank pulley and how do I remove it? I think I dropped a torx bit behind it when replacing my sc tensioner assembly. Could I just turn it on and hope it falls out instead?
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Old 03-06-2017, 03:06 AM
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CLK56TT (WIP), S65, RR 5.0 S/C
The one with 4 bolts? If yes, it's the water pump. Drop the belt, undo 4 bolts, it pulls right out.
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Old 03-06-2017, 03:11 AM
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Yeah thats the one thanks!! Ill get that done tomorrow morning, the serpentine belt tensioner sure is a ***** to get to with belt wrap kit installed
Any idea on torque specs for the bolts?
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Old 03-06-2017, 03:35 AM
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10 Nm
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Old 03-06-2017, 09:01 AM
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Magnet first ?
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Old 03-06-2017, 03:12 PM
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2004 E55
Originally Posted by Alex L
The one with 4 bolts? If yes, it's the water pump. Drop the belt, undo 4 bolts, it pulls right out.
I would recommend breaking loose the 4x 10mm bolts first while the belts are holding the WP pulley in place then dropping the belts... it will keep you from holding the pulley with one hand and straining yourself

I found that out while doing my crank pulley upgrade :-/

***Props on a shiny motor by the way***
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