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When did this first begin to happen? Changed belt or installed different pulley? Chased same problem. Solved it by shimming the idler pulley out so that belt ran in the middle of the pulley. Check the wear marks on the pulleys to see if the belts are running to the outside.
You'll need a Serpentine Belt Tool and a socket set.
Rotate the Caravan's serpentine belt tensioner assembly clockwise to
relieve the tension on the belt. Slip the belt off the tensioner with
your free hand before rotating the tensioner back to its home position.
Remove the tool.
Extract the two mounting bolts that hold the serpentine belt tensioner
assembly to the Caravan's front engine cover using your socket set.
Depending on your physical size and dexterity, you may find this easier
to accomplish through the top of the engine well or through the
passenger-side wheel well.
Pull the old serpentine belt tensioner assembly out of the Caravan's
engine bay by hand. Place the new serpentine belt tensioner assembly on
the Caravan's front engine cover and bolt it in using your socket set.
Rotate the new serpentine belt tensioner assembly clockwise with the
serpentine belt tool and then place the belt on the pulley by hand.
Rotate the new serpentine belt tensioner assembly back into place.
Remove the tool and close the hood.
Because this engine sits sideways there is very little "wiggle room". I bought a serpentine belt tool from O'Reilly's that includes a long flat bar and a few adaptors. If you use the long flat bar and the extension set to just the right angle, it can be done. I dreaded changing the belt on my '99 grand Caravan.
Removing and changing the water pump on a 2000 Grand Caravan should only be done if your van has a 3.3 liter or 3.8 liter V6 engine. On any other engine types, including four-cylinder engines, you must remove the timing belt from the engine to access the water pump, which is a dangerous task that can mess up the engine if attempted by an amateur. The procedure is as follows:-------------The water pump is responsible for sending the engine coolant to the engine.First of all remove the serpentine belt then remove the plastic cove on the passenger side behind the wheel. You will have to remove the pulley. Once the pulley is removed unbolt the water pump and remove it. Clean the surfaces and install new pump. Draining the coolant and replacing it is advisable.Drain the engine coolant, twisting and removing the drain plug at the bottom of the radiator -------------------Thats it.
Included on the Diagrams are the Instructions on "Rotating" the Automatic Tensioner. See Below for additional Instructions to make your job easier.
"HOW TO": I professionally prefer the Serpentine Tensioner Tool. Standard Rules to Removal the Serpentine Belt with an Automatic Tensioner: 1. Find the Tensioner(s). 2. Using a Serpentine Belt Tensioner Tool, Or Wrench OR Ratchet, Rotate/Move the Tensioner USING THE AVAILABLE NUT (located on the Pulley or Arm Base) OR the OPENING (3/8ths or 1/2 inch square opening located on the Tensioner Arm) rotating the Tensioner Pulley/Arm - moving it away from contact with the belt and towards the area where the belt is not in contact with the Tensioner Pulley. The Tensioner is spring loaded, and is hard to rotate/move. 3. Remove the loosened belt off one of the other more easily accessed Pulleys. 4. DO NOT quickly release the Tensioner, but gently allow the Tensioner to rest in its closed position.
Standard Rules for Installing the Serpentine Belt with an Automatic Tensioner: a. Pick a Pulley that is most easily accessed. This will usually be on top. This will be the last Pulley that the belt will go on. b. Using the Diagram: Install the new Serpentine Belt on the remainder of the Pulleys....over, under, left right. c. Using a Serpentine Belt Tensioner Tool or Wrench or Ratchet Tool: Rotate/Move the Tensioner Pulley/Arm "away" from Belt contact area on the Tensioner. This spring is pretty hard and with a new belt, it will be even harder to install. Rotate/Move this to as-close to the maximum allowed inorder to have enough slack in the belt to get it up and over the last pulley. d. Using your other hand - Pull the Belt up and over the Last remaining Pulley. e. Before releasing the pressure on the Tensioner, visually inspect the remainder Pulleys and the Belts' Positioning on them.
Before You GO: Let me know if this helped, or if you have additional information questions. Feel Free to contact me at FixYa.com!
What engine do you have? The 3.3 and 3.8 engines have a single serpentine belt, and a belt tensioner, so no adjustment is needed. Did you replace the tensioner, and want to know how much to torque it? countrycurt0