NST (NonStopTuning) Pulleys. Info, Specs, User Data...

[CtrlAltDefeat]

I see installing the underdrive pulley means you need to re-tension the belt... how do I do that? and how do I know what the tension is supposed to be?

[NonStopTuning]

Originally Posted by CtrlAltDefeat

I see installing the underdrive pulley means you need to re-tension the belt... how do I do that? and how do I know what the tension is supposed to be?

The alternator is used as the main source of tension for the belt.
When in doubt... more tension is better than more slop.

[Klink10]

Originally Posted by CtrlAltDefeat

I see installing the underdrive pulley means you need to re-tension the belt... how do I do that? and how do I know what the tension is supposed to be?

There was a DIY posted that included a method which I also used. Prior to loosening the alt., mark it with a line using a felt tip at the point where the bolt goes thru the bracket. This way you have a line on the alt. and the bracket. Without smearing the marks in the process, do your replacement and then realign the marks and secure. If you are also putting on the 10% underdrive crank your bolt position will move approx. 1/2 to 3/4 in. As far as tool used to achieve the tension, I used a wrapped prybar placed carefully.

Don't forget to allow for stretch if you are doing a belt change. Your marks will not align and to much tension to get them too will or may cause damage to other parts.

Hope that helps.