Details

• Brand:

  

  

• SKU:

  LC3Z-8678-A

• Positions: Rear
• Other Names:

  Tensioner Pulley, Idler Pulley, Kit Tension Pulley, YS381

• Description:

  This is a brand new genuine Ford OEM accessory belt idler pulley carrying part number LC3Z-8678-A, fitting 20-26 F-Super Duty trucks and 21-26 E-350 and E-450 Super Duty cutaway vans equipped with the 7.3L Godzilla gas V8, in the grooved rear position. The pulley provides a tracking and tension surface for the rear AC compressor serpentine belt loop on the back side of the front cover. The pulley face is grooved to match the multi-rib belt profile, distinguishing it from the smooth-face idler used elsewhere in the accessory drive; never substitute a smooth-face pulley in the grooved position or you will experience belt walk and premature wear on the rib lands. Bearing failure typically manifests as audible growl or chirp at idle, rough belt, or visible bearing seal failure. Replace any time bearing roughness, runout, or seal failure is detected, and always inspect adjacent idlers and tensioner condition concurrently. Sold individually with the pulley pre-assembled to the bearing and mounting flange. Verify position on the diagram and confirm engine option by VIN before ordering, since the 8678 idler family carries multiple suffix variants for different engines and pulley positions. Backed by Ford's OEM parts limited warranty.

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