Dayco Automatic Belt Tensioner 89689 Ultra-4WD This enhanced technology stabilises fuel

This enhanced technology stabilises fuel to prolong fuel life and adds a lubricity improver to combat reduced lubrication due to frequent stop-starts

Outside Diameter: 88mm

DMH4768 (x1)

Equivalent to Ryco RTK305

Supplied with special installation tool

Dayco Automatic Belt Tensioner 89689 Ultra-4WD This enhanced technology stabilises fuelDayco No Slack Automatic Belt Tensioner is designed to maintain constant tension on serpentine belt drives. The serpentine belt drives consist of a single belt that powers most, if not all, of the engine's accessories. To maintain the proper tension throughout the drive, an automatic, spring loaded tensioner is incorporated into the drive system geometry. Dayco's Automatic Belt Tensioner features a patented "flat spring" design that's engineered to