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      Belt Tensioner Serpentine Belt Tensioner
      Home / Belt Tensioner Assembly

      Serpentine Belt Tensioner

      What do a dead battery, a squealing noise, and repeated engine problems all have in common?

      The answer is a bad serpentine belt tensioner that may cause each issue. Often the cause of these problems is hard to find.

      What is a serpentine belt tensioner?

      Typical serpentine belts route around numerous drive accessories and components used on your motor. Manufacturers design serpentine belts to drive accessories on the engine such as the air conditioner compressor, alternator, and power steering pump. The name serpentine comes from the way the belt snakes around the engine. The serpentine belt wraps around a pulley connected to the engine's crankshaft damper. This is the main drive pulley for the engine's serpentine belt. It also wraps around pulleys located to each accessory. A constant rate of friction is required for the serpentine belt to operate correctly. Engineers create this friction by the material used to make the belt and the belt tensioner that holds it tightly against the pulleys. Manually adjustable belt tensioners were common on older vehicles.

      This type of belt tensioner required periodic adjustments to maintain the required tension. Today most modern vehicles use spring-loaded automatic serpentine belt tensioners. The serpentine belt automatically applies tension to the belt, keeping it tight against the pulleys. The main advantage offered by a belt tensioner assembly is that it applies a constant rate of tension at all operating temperatures and conditions.

      Maintenance of the belt tensioner assembly is vital for proper engine operation. The regular inspection of the serpentine belt tensioner is a smart practice. Address the issue as soon as your serpentine belts show signs of wear, slipping, squeaks, or chirps are heard.

      Vendor

      Make

      Model

      Year

      2003 to 2022 Dodge Ram Cummins 3947574 Belt Tensioner Assembly
      Cummins 3947574 Belt Tensioner Assembly Dodge Ram 03-22
      $162.70
      89-02 Dodge Cummins 5333499 Belt Tensioner Assembly
      89-02 Dodge Cummins 5333499 Belt Tensioner Assembly
      $149.10
      Cummins 5333477 Belt Tensioner Assembly
      Cummins 5333477 Belt Tensioner Assembly
      $132.22
      Mopar 68250093AA 93-02 Dodge Belt Tensioner Assembly
      Sale
      Mopar 68250093AA 93-02 Dodge Belt Tensioner Assembly
      $314.75 $375.00
      Mopar 5086958AA Automatic Belt Tensioner Assembly Dodge Ram
      Sale
      Mopar 5086958AA Automatic Belt Tensioner Assembly Dodge Ram
      $391.24 $446.00
      Ford 3C2Z6B209BA Belt Tensioner 6.0L Powerstroke
      Ford 3C2Z6B209BA Belt Tensioner 6.0L Powerstroke
      $154.98
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