They can if the bearings are bad but most of the time they will make no sound even though they are bad. Have it tested at any auto parts store if you suspect it it bad.
Make sure the alternators are properly installed and aligned.
Grinding
so bad
When a timing belt is going bad it can make a high-pitched screeching sound. It can sound like a high-pitch whirring noise. Not all timing belts make a noise when they are worn or going bad.
Usually it'll be a grinding sound.
Yes if rubber isolator is bad
Cars don't charge alternators; alternators charge cars. If your new alternator isn't charging, it could be your battery is bad or your battery connections are corroded. Another thing it might be is your voltage regulator. Many alternators come with built-in voltage regulators, but if your system has a standalone v.r., it could be bad too. Finally, if your 'new' alternator is actually a refurbished or rebuilt one, it could be a bad rebuild. It happens.
alternators are classified as stators and rotors
NO. they are a bad make. do NOT buy. they look, feel, and sound bad had one for a year and hated it. overall a crappy instrument.
Bad ball joint
it'll sound like a hollow tapping sound while rotating.
You can sound just as good with a broken reed than a new reed and even new reads can make you sound worse