Not sure which car you are talking about but you will need a 27 mm, 1/2" drive socket. This same socket is used to remove fuel injectors on these engines. Some cars you can get on the crank with the fan shroud in place and others you can't. If you remove the glow plugs you should be able to just turn it with the power steering bolt. Make sure you ONLY turn it in the direction that it normally goes (look at the fan - it should move in the direction to pull air through the radiator toward the motor). As far as the direction of the cam lobes just make sure that they are not in a position to be "opening" the valves. That is where you set the clearance.

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Jim