there should be an adjustable tensioner pulley.
You don't tighten a serpentine belt. The tension is controlled by a tensioner. If it is loose, then the belt has stretched and needs replacing.
You don't change the belt because it has a timing chain.
yes you can bypass ac with either a ac bypass pulley made by dorman or get a longer belt
Loose belt - will sound like a screeching noise.
Belt tensioner is not adjustable. Assembly is spring loaded, spring can loose tension. If belt stretches or is too long (wrong part) then .... (There are marks on assembly to indicate proper tension.)
yes, you actually dont even have to losen that bolt
A 1997 Dodge Caravan is fuel injected, not carbureted.
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The 97 4.3L engine doesn't have a timing belt.
Sounds like the belt is slipping. Try pulling the belt tighter and tighten up the pulley tighter than you did before. Torque it down pretty good, though not too much. Engine vibration will loosen it.
Change the belt
Belt.