Alternator dying on my 300ZX ?!

[Fairlady86]

Hello! Hope you can help me..

I got a 300ZX 90 mod NA, and i think my alternator is dying.

When the car is facing heavy eletrical load, the waterpump-belt is squeeling like hell..
Im sure it is the alternator belt since my A/C is in my garage and powersteering belt is off.

Anyway, i left the car at idle, turned on the heater on full speed, heat threads, stereo, power windows as well and the belt squeels.
Popped the hood and used a multimeter on the battery. (yes, i used ear protection...)
Alternator is charging 12.38V



After turning off everything of electric components, except head/rearlights and stereo, the alternator charged 14.25 volts..



This squeeling is happening even when i drive and do the same stuff listed above.. It even happens if i just turn heater on full when it rains.

Got a brand new 95AMP Hankook battery.
Alternator has neven been changed, so I guess it has over 120 000 miles on it.. Should i replace my alternator with a new rebuilt one?

[nick1809]

grab a new one, that would be your best bet. or take it to autozone and they will test it. Z1 has new ones for 228 and used ones for 100.

[Fairlady86]

Im from Norway, so its better to buy a new one.. ;P

You think the alternator is not charging enough when its heavy loaded ?

[J30tChumpCar]

Your belt needs tightened or most likely replaced, all issues will be resolved.

[aroche25]

Your belt needs tightened or most likely replaced, all issues will be resolved.

Yes exactly