Well I was asked to share what I found out as to why I kept throwing my belt after replacing the tensioner.
I did have a NAPA tensioner on the truck for the last four months with no issues until recently, before that I was throwing belts constantly about a month ago I threw the belt again replaced it and started eating the belt almost right away. Sooo I dropped the $245.00 at the dealer for a new tensioner 2 pulleys and a belt. The NAPA tensioner has a steel grooved pulley the GM pulley is phenolic (not a big deal) the ribs on the NAPA are about 1/32” or less off center from the GM unit. Shouldn’t make a difference… I did notice that one of the pulleys I pulled off was missing a ball bearing and some bluing started to occur. The other pulley seemed fine on inspection. Replaced everything with new from GM.
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What I think was happening was the bad idler pulley was getting the belt hot enough to melt the back side of the belt causing it to try and slide of the rounded front edge which in turn caused the belt the miss-align with the alt pulley cutting the belt one or two grooves at a time.
<o> </o>
Moral of the story: if you eat a belt change the frickin idler pulleys too.
I did have a NAPA tensioner on the truck for the last four months with no issues until recently, before that I was throwing belts constantly about a month ago I threw the belt again replaced it and started eating the belt almost right away. Sooo I dropped the $245.00 at the dealer for a new tensioner 2 pulleys and a belt. The NAPA tensioner has a steel grooved pulley the GM pulley is phenolic (not a big deal) the ribs on the NAPA are about 1/32” or less off center from the GM unit. Shouldn’t make a difference… I did notice that one of the pulleys I pulled off was missing a ball bearing and some bluing started to occur. The other pulley seemed fine on inspection. Replaced everything with new from GM.
<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
fficeffice" /><o> </o>What I think was happening was the bad idler pulley was getting the belt hot enough to melt the back side of the belt causing it to try and slide of the rounded front edge which in turn caused the belt the miss-align with the alt pulley cutting the belt one or two grooves at a time.
<o
> </o>Moral of the story: if you eat a belt change the frickin idler pulleys too.
