Posted 9/17/2020 09:31 (#8500476 - in reply to #8499083) Subject: RE: 9670 Engine squel--idler pulley?
NW Wyoming
Just went through this last year on a 9770. Replaced fan belt helped for a while but noise came back. Finally replaced the crankshaft pulley and fan pulley and alternator pulley and noise went away. All three were sharp and worn. When you got them out where you could actually see them it was pretty obvious.