I double checked everything tonight just to be sure and took a couple more pics. I'm starting to think the lower radiator hose that connects to the water pump might potentially be the issue though it's hard to tell. Unfortunately I could not get a clear picture of this. It's definitely pretty wet - but it could just be splashing up from coolant leaking on to the fan from the WP. I'm wondering if it would be worthwhile to remove the fan, dry and clean everything up as best I can and run it again while monitoring. I also verified that it doesn't look like the big adjustable wrench recommended in to e38 post i linked to will work since there is not enough clearance between the fan and the water pump pulley. Looks I will need to get a 32mm box wrench for this (as it looks like TIS is showing). I also don't understand how I would get the special tool hooked onto the pulley bolts (for holding the pulley) since the bolt heads seem about flush with the rim of the pulley. All this said - is it possible, or even worthwhile to attempt replacing just the lower radiator hose to see if it fixes the leak without having to remove the fan, water pulley and belt(s)? I guess it would make sense to just replace the lower radiator hose anyway if I end up having to replace the water pump since it's so buried anyway because it will probably end up failing some time soon anyway. Thoughts?

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