How much play in waterpump bearing?

[yimmy149]

I am replacing my polyrib and alternator pulley. How much play should there be in the waterpump bearing? I can feel a click when I move it's pulley, but can't actually see it moving, so it must be somewhere in the 1/4mm range.

There is also a teeny bit of play in the two idlers, but not the tensioner. I'm going to try tightening them, since some people have mentioned they come lose. But if that doesn't help should I replace them?

Anything else I should check while the belt is off?

Edit: Is it safe to run the engine for a couple minutes with no belt so I can listen for any other problems? It would be a cold start.

-james