alternator belt squeak

[shooter]

When I recently changed my t-belt I also changed the alternator and p.s. belts. The alternator belt has a little squeak to it at idle. Not a squeal from slipping, just a little slow speed squeak. When I spray a little belt dressing on it it will stop for a while then come back. Is there a good belt dressing or any other trick to stop this squeak? Thanks. I saw on youtube to hold a candle against the underside of it to stop a squeak by getting wax on it. Didn't work.

[nunya]

Re-adjust it and make sure the alt. is mounted tight. The new belt proably stretched

[GrimGreg]

Sure it is the belt and not the bearing in the alt?

[Kingman]

Belt dressing, waxing, water, and taking a wire brush to the side of the belt while the engine is running are only temporary fixes. You'll probably need a new belt, or you'll need to clean off the pulley real well. It could be glazed over and can't grab the belt as well as it should.

[sherwood]

Could be the bearing set. I took mine off and greased it well. It's just a band-aid but it's held up in for almost a year.

[shooter]

I googled it and one solution suggested by a mechanic (he says) was to put a dollop of grease on each side of the belt. 150 miles later it is still quiet.

[Precise1]

LOL, greasing a friction drive surface!!

 

I second the glazed pulleys. If everything else is proper, all a belt needs is proper tensioning.