Modifications: how to determine new belt size

[JHZR2]

I upgraded my 98 S-10 to an AD244 145A alternator. It's slightly bigger, so most say that a belt approximately 1" longer is needed.

My OE belt size is 6 x 960. I found that a 968 size was available, as was a 970.

The 966 belt fit quite easily, but unfortunately I didn't take good enough notes on where the tensioner marks were (plus I changed the tensioner with a GM OE), so I'm a bit lost.

What's the best way to know if I picked the right size belt? I suspect that the worst-case scenario would be that the tensioner is a bit too far compressed. But does that have a bad effect on the belt or component bearings?

If there's no noise and everything works, should I be concerned?

Thanks!!

 

[SHOZ]

I've heard on the serp belts that a 1/4 twist between the longest pulley stretch is ideal.

 

[SatinSilver]

Hopefully, Trav will chime in or send him a pm. So there's no noise and everything works ok? That's a huge plus. I think the current belt might loosen a smidgen as it wears. At least you have a nice, new alternator in there.

Is the coolant reservoir empty?

 

[Trav]

No problem at all, you are within the upper and lower limits on the tensioner. If its in that zone no additional wear or slippage will occur.

 

[JHZR2]

Originally Posted By: SatinSilver
Is the coolant reservoir empty?


Good eye on the reservoir!! I had drained and replaced the coolant a month or so ago, and forgot to refill.

 

[JHZR2]

Originally Posted By: Trav
No problem at all, you are within the upper and lower limits on the tensioner. If its in that zone no additional wear or slippage will occur.





Perfect, thanks!!