Old thread bump... Hidden lower coolant pump bolt behind damper pulley can be loosened and removed using a flex ratcheting wrench. I used a craftsman 10mm. Did not have to remove the damper pulley.

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'04 N62 - Alpine White/Truffle
'03 S62 - Petrol Mica/Champagne
'97 S52/4/5 - Alpine White/Dove
'91 M42/4/5 - Brilliantrot/Tan