Made it to the WP. There's definitely some play and a rattle when I shake it. AC belt is loose, that adjustment screw is a huge pain, but at least after 30 min of contortionism, I finally found the right way and get the bit in and on it pretty quickly.

I see no easy way of accessing where I think the drain plug is for the coolant. Think I'll just drain the radiator and call it good...

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'08 X5 4.8i - 196k
'15 i3 REX - 95k - Blown AC compressor

'98 323is - 170k - Garaged
'94 325i - 208k - Sold