Is this "pin" reverse threaded?

Hi all. I'm in the midst of replacing timing belts, and am replacing the bearings on the water pump tensioner while I'm at it. However..I can't get the assembly apart--specifically removing the bearing from the bracket it is on. This would be getting nut 59 off of bolt 55 on the attached image. The bolt is referred to as a pin on the parts list, so I don't know if that means anything or not. In any case--the thing is really together and has been soaking in deep creep for a few hours. Does anyone know if the pin/bolt is reverse threaded? Any other suggestions? I don't have an impact driver, which might be the other solution. Or maybe a nut splitter.....
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Thanks for all the comments, they're always useful. Especially to Ramosel, those photos are great: I went to the Flickr page and scrolled through almost all. I would have broken something inside the idler without your help. I have now determined that the time I don't ask a silly sounding question will be the time I break something expensive for no good reason.

So after getting some longer wrench arms I finally cranked the thing apart. It is the only place I've come upon any corrosion to speak of.

So here is the next silly question:

Look at the two attached photos. There is some sort of plating on the pin that is beginning to fail, primarily at the location of the snap ring/spacer and the inner bearing race. If I re-use this pin, is it likely to corrode itself into an unfixable mess, or would a thin coating of grease more or less prevent this? I think this is the first time that bearing has been apart since the car was new, so this is the result of 23-years and 60K miles.

Note that I do drive in the rain, as did the previous owner. I don't mind buying a new pin, but I'm not looking for perfection here. Thoughts?

And thanks.

Peter
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