I had the same problem with my 1991 Dodge Dynasty. Replaced many belts;
replaced tensioner; still squeals intermittently. Someone told me that
on this car there was a design flaw where all the pulleys didn't line up
precisely, and that that was what caused the squeal. I just live with
Possibly the timing belt tensioner. My 92 caravan screeched pretty
good...along the line it ended up needing both serpentine belt tensioner and
either before or after (can't remember which) it got a timing belt tensioner
also. Both of them were causing noise...
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