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Re: Belt Tensioner replacement
A simple bolt on assembly, the tensioner for the serpentine belt may need replacement if it fails to smoothly pivot and maintain tension on the belt.
Using a half inch breaker bar, release tension by rotating against the spring, remove the belt from the tensioner. Unbolt the tensioner (one bolt may be so diffucult to reach that you might want to use a racheting open end wrench by Alden.
Install the new tensioner by reversing these steps.
I usually replace the belt at the same time.
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Fig. Fig. 11: Accessory drive belt adjustment-3.3L and 3.8L engines
All of the belt driven accessories on the 3.3L and 3.8L engines are driven by a single serpentine belt. The belt tension is maintained by am automatic tensioner.
Disconnect the negative battery cable.
Raise the front of the vehicle and safely support it with jackstands.
Remove the right front splash shield.
Release tension by rotating the tensioner clockwise.
Remove the belt and install a replacement.
Proper belt tension is maintain by the dynamic tension.
Install the right front splash shield. Lower the front of the vehicle.
What I would do is take a look at parts for your engine on the advance or autozone websites. Note that you can buy a new tensioner pulley OR a new tensioner assembly. What a lot of folks do is assume the bearing is bad on the pulley so they just replace the pulley. In reality the spring in the tensioner assembly has weakened with age and hence the whole belt is flopping around. The labor to replace either is the same, loosen and remove the belt, unbolt the assembly, bolt in new one put the belt back on and you are good to go. If the belt continues to come off you need to look elsewhere so I would give every pulley a good tug while the belt is off.
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.
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!
you need a 15mm wrench and skinny hands or a long belt router. place wrench on tensioner bolt and pull to rotate clockwise,at same time undo belt always holding tensioner, after removing belt from a couple pulleys release tensioner and finish removing belt from engine,for installacion reverse procedure.
should not have to remove anything you just put a wrench on the belt tensioner and it moves over. then remove and replace the belt. make sure you draw a belt diagram first if there isn't one under the hood.
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