Cummins ISX belt squeal

All you need is a short vid doing your best impression of John Madden descibing your problem. lol. Sorry, couldn't resist.

 

Weird, I've had several mechanics tell me it's my belt. Now I have three (belts), all idlers and tensioner have been replaced, alternator had new bearings installed...I give up. I have to nose in at truck stops so I don't annoy the other drivers while they're sleeping. Once the part finally fails I'll replace it. Not spending any more on it.

 

I have learned recently that if the pulleys get dirt in the groves it will let the belt slip on a serpentine belt took an ice pick and cleaned the groves, no more sliping until they fill with dirt again.

 

Paraffin or surf board wax applied to both sides of the belt will shut them up sometimes. Apply while running and watch your fingers.

 

how do you release the tension on the smaller belt behind the serpentine one?

 

My friend Had a converted commercial 32' alum. dive boat with a 360hp cummins and when we would drift and sleep at night with all the electronics and deck lights on on the tuna grounds. When we would start the main engine in the morning our alternator would chirp like a b!tch from the amperage pull to the multiple battery banks. 2 for the main, 1 for the genny, 2 for the house all on isolators.

 

I would yank the belts off then clean the pulleys off with mineral spirits and a rag. Using a brush to get in between the grooves would be a good idea.