belt noise, bearing

[Rawze]

(12-29-2018 )imalumberjack Wrote:  ISX 12, I have a squealing bearing? on front of engine. almost positive its a idler bearing or alternator? I have used a stethoscope but can't quite pin point? any good ways? was considering removing front belt (there are two) at least this would eliminate half? I hate replacing parts without knowing.

how do you know it is not a belt squealing?. A bit of soapy water in a spray bottle onto the belts (without soaking the pulley bearings) while its running will make the sound go away if it is a belt.