I turn with the power steering nut. No need to get to the crankshaft bolt. Some people are adamantly opposed to turning the engine with the power steering nut since they think it tightens the nut too much. The shroud loosens easily but I don't know if just loosening it will give access to the crank bolt or whether you need to pull the fan to get the shroud out. If you need to remove the fan you'll need to grind down a box end wrench to fit around the fan bolts.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13