My truck is a 95 3500 dually 6.5 turbo - replaced the motor about 4 months ago with a motor from another truck i bought off craigslist. The guy told me it was a rebuilt motor but it turns out it was a factory crate motor from a local dealership. Anyways, the serpentine belt just started the jump off..... it came off 3 times yesterday and it only came off while i was starting the truck. if it stayed on during the start then it would stay on with no problem. i got to looking at the altenator as i was releasing the idler pulley while putting the belt on the last time and as i released the idler the alt would move....it was minimal movement lets say about an 1/8 to 3/16" but enough i could notice it...SO..... my question is..... anyone ever hear of the top alt bracket losing its shape or strength ? I havent but who knows.....my quick fix for the last time it popped off was taking 2 quarters out of my pocket and wedging them underneath the alt bracket ..... guess what....started up 15 times today with no problems

Anyone with suggestions ? or should i just replace ?

 

are the bolts loose that connect it to the block. they probably are so just tighten them up

 

they were tight this morning....just got towed home for $110.00 .... driving down the highway @ 70mph when the alt exploded.....broke the casing at the bottom bolt and broke the mickey mouse upper bracket....i will take a pic of it in the morning when i fix it......thnx for the reply

 

that doesnt sound good. hope you get it fixed fast