Details

• Brand:

  

  

• SKU:

  W716498-S437

• Other Names:

  Idler Pulley Bolt, Bolt Hex Head Flanged

• Description:

  This is a genuine Ford idler pulley bolt, a hex-head flanged fastener that secures the accessory drive belt idler and tension pulley assembly to the front engine accessory bracket. In Ford dealer catalogs it appears under several names including Idler Pulley Bolt, Accessory Drive Belt Idler Pulley Bolt, Pulley Bolt, and Belt Tensioner Bolt, all referring to the same flanged hex-head bolt. It threads the idler or tension pulley against the engine front cover so the serpentine belt maintains correct routing and tension across the alternator, water pump, and other accessories. You will find this fastener used across many Ford applications including F-150 and Mustang with the 5.0L and 5.2L V8 engines in single-alternator, dual-alternator, and supercharged configurations, with model years spanning roughly the mid 2010s to mid 2020s. These examples are representative rather than a complete list. A loose or missing idler pulley bolt allows the pulley to wobble or walk off its mount, which causes belt squeal, belt misalignment, accelerated belt wear, and in severe cases the belt jumping off the pulleys and loss of accessory drive. Replacing a corroded or stretched bolt during belt or pulley service restores proper clamp load. Because applications vary by engine, alternator count, and supercharger fitment, confirm the correct fastener against your VIN before ordering.

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