Determining proper tension for new serpentine belt

[castles]

you could see if this guys squeaky belt solution works for you...

https://www.youtube.com/watch?v=HRrVMtyIqIY

[RMcG]

Originally Posted by castles

you could see if this guys squeaky belt solution works for you...

https://www.youtube.com/watch?v=HRrVMtyIqIY

Thanks, in fact I already saw this video and the solution of slowly turning the key worked for a while, but the squeeling got worse.

R.

[B.B._07]

Originally Posted by castles

you could see if this guys squeaky belt solution works for you...

https://www.youtube.com/watch?v=HRrVMtyIqIY

That video is useless, guy just offers up a theory when the real solution is obvious (the belt needs to be tighten).

I wouldn't be overly concerned with the belt being to tight. I've changed the serpentine belt on a Toyota 1.8L 1ZZ engine which is the big sister 1.5L 1NZ in the Yaris. The 1ZZ has an auto tensioner and it puts a lot of tension of the belt. If you're super concerned about the tension being too high you can loosen the tension to the point that it starts to squeak and mark that point on the tension adjuster with a paint pen/whiteout/nail polish/scratch awl/etc. Then tighten it a little bit, mark the point, and test it and repeat until the squeaking goes away. I used that method and my belt is nice and quiet.

[scylla]

Yep, best way to do it right there B.B.
A Yaris belt is so easy to tighten that it only takes a few tries to get it right if you have an ornery belt.