Marks has a fairly good rep. If all you need is a simple water pupm R&R, and it has no bizarre, M3 only facets, like say having to loosen the motor mounts to get access. My old SRT-4, you had to remove the intake manifold to R&R the starter, and replacing the intake plumbing was crucial, since it was a turbo motor, and any misalingment of the piping from the turbo to the intake would leave a boost leak. check with the guys at bimmerforums, or m3forums, make sure there is no oddball stuff like that.
Now, hv, I didnt say bitter cold, I just said cold
My graduation weekend from boot camp, back in 83, it was -85 with the windchill, so, yep, I know bitter. Ive spent time in Alaska and Iceland too
Take this AM. What a waste of "winter". Not cold enough to properly snow, just sorta ice, maybe kinda. Weak
Just wintry enough to crappy, but not enough for fun