Brand new belt is squeeling

[06YarisRS]

Before replacing my belt, I ran the engine and saturated the spinning pulleys with brake cleaner a few times. I didn't really care about the belt as I was changing it. I think the pulleys can get glazed when a belt slips. Cleaning the pulleys may help. I agree with tmontague about finding the loosest tension without slipping. So, if you have squeaking, tighten it a bit, maybe a couple of mm at a time until the squeeking stops under all conditions. Since putting the Continental (former Gatorback) on mine, I haven't had so much as a chirp.

[RMcG]

Originally Posted by 06YarisRS

Before replacing my belt, I ran the engine and saturated the spinning pulleys with brake cleaner a few times. I didn't really care about the belt as I was changing it. I think the pulleys can get glazed when a belt slips. Cleaning the pulleys may help. I agree with tmontague about finding the loosest tension without slipping. So, if you have squeaking, tighten it a bit, maybe a couple of mm at a time until the squeeking stops under all conditions. Since putting the Continental (former Gatorback) on mine, I haven't had so much as a chirp.

Thanks for the tips 06YarisRS, tmonague and everybody. To answer all of your questions I used a Bando belt from RockAuto belt as 06YarisRS and xdarkxfirex suggested on this forum on thread 59231, see
http://www.yarisworld.com/forums/showthread.php?t=59231 . It was my understanding from reading this thread that these Bando belts from RockAuto are as good as OEM Toyota belts.

Regarding why slowly turning the key should matter, see the youtube video in my original post https://www.youtube.com/watch?v=HRrVMtyIqIY . They theorize, as I say in my original post, that this is due to the onboard computer not having the time to tell the alternator to decrease its loading.

Thanks again to everybody.

R.