Simply that if it is indeed the waterpump bearings that let out, the pulley angle got pulled down by belt tension just enough to let the fan contact the main pulley of the engine, which would be why they broke off.

If you have a ratchet, short extension and either a 16mm or 5/8" socket you can remove the belt and see if the fan/waterpump is indeed the culprit.

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X5 pics

RIP 4.6is.....

2003 4.6is