Quote:
Originally Posted by kibblesret
Hey thanks for the quick reply!
I would agree with the belt slipping if the van overheated as well. it doesn't.
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Incorrect. The belt only slips around the alternator pulley, so everything else like the power steering and water pump are not affected. I know this because I had this same problem when I first bought my van. It was worse when cold and almost never happened when it was warmed up. I had a new alternator and a new belt and it still slipped intermittently. I ended up changing the tensioner to solve the problem.
I think it happens because the alternator pulley is too small and doesn't have enough pulley to belt surface area. If you look at all of the other pulleys driving accessories you can see that they're much larger, which is why they don't slip so easily.