How to Make a Belt in a Car Stop Squeaking

A vehicle's belt system uses energy produced by the vehicle's engine to power the vehicle's mechanical accessories, such as an air conditioning unit, the alternator or the power steering pump. The power produced by the engine is transmitted to the mechanical accessory by way of a pulley, which is positioned on the front of the accessory and turned with a rubber belt. Over time, this rubber belt stretches. Often a belt actually slips on the accessory's pulley, producing a squeaking sound. This is particularly problematic when the vehicle begins to accelerator from a stopped position. To remedy the squeaking sound, it is necessary to tighten the tension on the belt.

Things You'll Need

  • Wrench
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Instructions

    • 1

      Locate the adjustment bolts for the accessory that uses the belt. The engine's accessory is located on the front of the engine, and to the side of the engine's center point. The accessory is connected to the engine with two, sometimes three, mounting brackets, which are in turn bolted to the engine.

    • 2

      Use a wrench to loosen these mounting bolts by turning each bolt in a counterclockwise direction. Take care not to remove the bolts---they only need to be loosened.

    • 3

      Pull the accessory away from the engine while ensuring that the belt remains over the groove on the accessory's pulley. Pulling the accessory will tighten the tension of the belt.

    • 4

      Tighten the adjustment bolts that hold the accessory to the engine while simultaneously maintaining tension on the belt by using a wrench to turn each bolt in a clockwise direction.

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