Cool! Yet another great writeup.
What's the purpose of the freeze plugs; as you asked in the other thread, why have a hole that's plugged….and never, ever opened?
'99 528i ('98/12 build). 282,000km BY29428/Royalrot
Breaking My Wallet since 2009
Mods: Stoptech SS brake hose, 280piece toolkit resting on trunk floor, Beisan VANOS seals, increasing amounts of duct tape and glue
'99 540i (grandfather's)