There is nothing unusual about the bolt and your description implies that the one you have is either an unmarked or grade 2 bolt, both of soft steel. It can be replaced with either a grade 5 or 8 available at most hardware stores. With a hard bolt the bulk of the wear will be transferred from the bolt to the pump bracket. I any case the accumulated wear over time will cause misalignment of the belt and alot of vibration. The best plan is to replace the bolt and refurbish the bracket by counter boring the pivot holes and inserting bushings to eliminate the worn surfaces. I believe that Gary The Parts Doctor provides this service. I can't find the invoice currently so am not certain he does it. I am sure someone will respond to clarify. I had mine refurbish in this manor and it runs true and silent. MN Marshall ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/