belt squeal

[georgeramos]

So i thought maybe my water pump was starting to fail becaise the squealing became worse so i swapped it out.

Nope.

Still squealing. How could wiring cause this issue as Chris G suggested?

I am going to try a new belt today.

[georgeramos]

I noticed that the alternator pulley squeaks when you spin it by hand, is that typical?

[klweimer]

georgeramos,
You mean it squeaks when there is no belt on it, and you spin it by hand? Time for a new alternator, or at least a rebuild.
Kirk

[chrisg]

George, I meant some wiring draw that is causing the alternator to be overworked...well, i guess that's what I meant. Hell, I've slept since then....Hope you figure out what it is. I still have an off-idle chirp on the same alternator on my '71 unless I'm driving it regularly.

[seabeelt]

I have had the same issue with my 95 amp upgrade I have changed the belt a couple of times. Checked the alignment of the pulleys with a straight edge and so forth. Belt is tight, just seems to be a characteristic like chris said. If I use it pretty regular, no issue. If it sets, or if there is a heavy load when starting up ( like leaving the headlight switch in the on position) It will squeal a bit but then quiets down. Definitely has to be 1/4 inch or less of belt play. It just doesn't like a heavy initial load with the quick revving engine. Otherwise runs like a champ. heater fan, engine fan, headlights, fog lights, wipers and heated seats all at once, no complaints I do keep a small ratchet with a 13mm socket in the tool box just in case

[georgeramos]

There is a noticeable whine from the alternator now so i an gonna exchange it, still under warrantee.

I sanded the belt seat of the pulley with 80 grit pretty aggressively and it seemed to stop the squeal a bit. There is still a chirp on startup and I haven't driven too much since then so we'll see. The pulleys on the 95amps are really smooth so I will sand the new one before dropping it in...

Thanks all!

[RRoller123]

I wonder if a treatment with "belt dressing" that we see at the various auto parts stores might help?