Belt and Tensioner issues at 5000+rpm

[Noreaster]

Dayco tensioner part# 89259 $48 on rockauto

 

[prostreeter600]

Great minds think alike Chevy1925 as I too carry my old belt with me as a backup

 

[Ne-max]

Put new Napa tensioner and pulleys on mine along with a new belt. Belt is staying in groves at 4600rpm

 

[oscyjack]

40k only Gates tensioner and green belt. Did it the first week I had the truck. Time for a new belt soon but tensioner still seems good

 

[WolfLMM]

I must be lucky. Never tossed one. 4500rpm all the time.

 

[hntngkd]

How are you guys making sure the dual fueler pulley is aligned properly? I eat up belts like crazy doing highway pulls on my way home from work at night.

 

[MarkBroviak]

It's the nasty diesel jerking of the belt that causes it. I ended up making a custom belt tension for mine with extra high ribs and a locking mechanism to keep the tension from moving. Soon as I put the triples back on mine it went to throwing it off every time it would cut loose. See this issue all the time on the engine dyno so I got to the point where we try not to run a belt at all.