I've got a crappy remanufactured Bosch alternator in my bird. Periodically, my sound system will emit a squealing/buzzing noise that increases in pitch with RPM's. I've managed to deduce that it is most likely the alternator, and now I'm looking into a replacement. Firstly, though, I want to know if a rebuild kit will cure my problems. I've also noticed that the bearings seem to be dry?? in the things, as it doesn't rotate too well...Thanks for the thoughts.

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87 Firebird 2.8 w/!MAF/!CAT/K&N Filter/Bosch Platinum +4/Neihoff Platinum
Wires/Blue Streak Cap+Rotor/Crazy Sound System/Crazy Driver/

 

Could be.....Or, if you have a head unit & remote amplifier, it could be a ground loop between the two units. Read the "Whine" and "grounding a amp" posts under the Car Audio board, for some additional info.

Tim

 

you could also check your ignition system like plug wires and cap and rotor. all the noise i had was because of my msd box



[This message has been edited by 9177 (edited December 20, 2000).]

 

Thanks for the help, 9177, but no dice. I have changed my wires, plugs, cap, rotor, battery, and I don't have a MSD box. Thanks for the help anyways, dude. But come to think of it, maybe my coil is going...good idea!

 

A bad diode pack in the alternator will cause noise also.