I'll check the hoses first, and maybe change water pump, t-stat, and expansion tank as worst case it'll be preventative maintenance.

I hope it's not the valley pan/coolant pipe, not because I'm particularly scared of the work, but I'm not convinced if the valve stem seals are bad and I know that will be a perfect time to address them. We lose a quart of oil in about 4k miles, but I haven't had a chance to poke around to see if valve cover gaskets or anything else is leaking, and I do have new PCV valves ready to be swapped in.

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'08 X5 4.8i - 184k
'15 i3 - 92k

'98 323is - 169k - Garaged
'94 325i - 208k - Sold