Sunday, February 16, 2014
How to Use a Tensioner on an Alternator Belt
A belt tensioner is a spring-loaded device on some engines that holds a specific amount of tension on the serpentine drive belt or accessory belt while the engine is in motion. Too much tension on the belt can stretch it, causing the belt to weaken, while too little tension can cause the belt to squeak and whine. The belt tensioner makes it relatively easy to remove the belt from your vehicle if you need to perform maintenance on any of the components the belt drives, such as the alternator.
Instructions
- 1
Open the hood of your vehicle and locate the alternator and the belt that drives the alternator. Find the belt tensioner for the alternator belt.
2Place the box-end of a wrench around the bolt on the belt tensioner. Choose a wrench that properly fits the bolts so it does not slip.
3Pull the wrench counterclockwise to draw back the belt tensioner (compressing the spring) arm and release tension on the belt. Continue holding the belt tensioner and remove the belt.
4Turn the belt tensioner clockwise slowly to return to its normal position (allowing the spring to relax).
5Pull the belt tensioner arm counterclockwise to reinstall the belt. Route the belt along the pulleys following the belt-routing diagram for your vehicle. Check under your hood for the belt-routing diagram; consult your service manual if you are not able to find it.
6Turn the belt tensioner clockwise slowly, with the belt rerouted along the appropriate path, allowing the tensioner arm to draw the belt taut.
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