is it still loose when the shaft is in place, as it will appear rattley until you fit the inner race(ie the shaft). If the outer race is loose in the scroll then this would indicate a worn inner locating diameter, depending how loose it is you can get away with fitting with loctite bearing retaining stuff(pretty much the same as studlock) just don't get it in the race. The allternative option if the wear is particulaly bad then you can sleeve the scroll, but you'll need access to a good lathe and materials, if sleeving the scroll then it may need rebalancing depending on the sleeve material.
