Review on ALPHA MOTO 2 Piece Fan Clutch Wrench Set - Nut Water Hub Removal Tool for BMW GM 318i 323i 325 328i 330ci by Aaron Shaw

If the key holder doesn't fit your pulley, you may need to turn the water pump. My water pump pulley bolts aren't in a perfect square - they're something like X's on their side. The key didn't fit at first, but after turning the pump it fitted fine. I had disconnected the thermostat hoses (it's always recommended to replace them when you build a pump) so it was easy to get the holder and wrench in there. My nut was rusty so I carefully fired the PB blaster. After soaking for about 15 minutes, a light tap with a hammer was enough to break the bolt. Remember this is a reverse thread. I have a 2004 E46 325.