Are you sure the pump is constantly driven?
Just found this online from evo magazine:
â?? It's driven by a friction wheel pressing on the back of the auxiliary drive belt, and a servomotor ensures the wheel is only in contact when there's a need for water flow. That gives a quick warm-up and saves energy. And because the pump isn't subject to the drive belt's tension, it can have a smaller bearing and a plastic housing.â?
Only saying this as changed the belt on mine and itâ??s not spinning either havenâ??t let it warm up yet!
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MINI Cooper R56 Friction Wheel Replacement (2007-2011) | Pelican Parts DIY Maintenance Article