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I'd like to give my opinion on the whole turning the crank via the power steering pulley thing.
Please note - I'm not jumping up and down saying it should never never ever be done! We're all free men here (I hope) we can all do what we want. But I do think it is bad practice for the following reasons
1) The power steering pump and pulley is designed to be driven rather than designed to be the "driver" - turning the crank this way applies unnecessary force to the system.
2) Over tightening utility belts can / might / could damage bearings even if it is done for a short time.
3) OM617s have a pretty well known achilles heel - that crank pulley system and crankshaft balancer is known to fall off. I think that that is a good place to visit during routine maintenance. Hopefully with frequent visits to that area a mechanic would notice that something was loose / wrong in time to avoid a costly repair. If you don't go there you don't know!
So I say use a 27mm socket on the crank in preference to any other method.
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