[ctbale]

personally? I ain't replacing a perfectly good pulley. Just inspect them for smoothness. they are pretty well built. I asked my dealer the same question before I changed my TB. he doesn't even stock them, nor does he stock the tensioner. They should feel the same though, if one feels worn, or in any way different the the other one, replace it. (there are only two, one fixed, one on an arm that is doing the tensioning.)

I would do the water pump, more going on with that bearing, the weight and vibration's from the impeller, and one seal has coolant under pressure on the other side of it, among other things.