My engine belt slip off the pulleys. How do i fix

There is an idler pulley and a tensioner. Maintenance Lubrication Belts Pulleys for 2013 Chrysler Town Country

My 1991 Grand Caravan did that too. It had the 3.3L engine just the the T&C (91-93). The tensioner was the problem, hit a puddle on the right side and you'd feel the power steering go and then right away the engine would start to heat up. I tried making the belt come off, but could never duplicate it, only splashing through puddles of rain or wet slush would do it. I never found a tensioner with shoulders on it, but a new one like the original fixed it.

remove the belt and see how much play is on the alt pulley sounds like a bearing wearing out.

There is a factory fix for this (may be a recall), consult your local Chrysler dealer.

It sounds like the belt is slipping or maybe even the compressor is seized. Just check to see if the compressor is turning.

Remove & lubricate with WD-40 for overnight in warm place. If no go--heat with a torch as long as its all metal. If no go--replace.

just fixed rattling problem on my 2005 grand caravan 3.8 replaced alternator pulley has a clutch effect when i twist it back and fourth by hand could hear rattling and squeaks replaced alternator and pulley and rattling is gone

Any bearing mounted pulley can "freeze" if a bearing wears out. The most common result it it can burn up a belt which will break with the engine running. When it snaps it MIGHT damage anything it hits - usually with no bad results. ANY bad pulley (or pulley driven part such as the alternator) needs to be replaced before a new belt is installed or the new belt will be damaged from the friction. To replace the serpentine belt - there should be a belt routing decal on the underside of the hood or on the shroud covering the radiator.

the timing chanin is behind the timing chain cover on the passenger side of the engine. u must remove the crank pulley to remove the cover.

no you do not have to remove the engine to service the timing chain

For the 3.8 liter engine, to install the belt, use a 14 mm straight wrench with a
breaker pipe (I use a jack handle) slipped over the wrench to extend the
reach and create more torque. Route the belt on all the pulleys except for the
top right pulley (alternator?) while holding the belt in position with 1 hand,
loosen the tensioner with the wrench and pipe combo until you can create enough
slack in the belt to slip the belt on the last pulley. Remove your tools. Job done.