Split impeller

[Slick Fork]

Hmmm,

So is there any reliable way to guesstimate the damage done to the pump already. I noticed the noise started last week and got really loud over the weekend but I didn't get a chance to tear it apart until last night, so lets say 5 or 6 days of noticeable loudness and god knows how long it's been banging around without me noticing.

I don't know how keen I am to throw $45 after a new impeller if the pump only has a limited life left