Dayco Automatic Belt Tensioner APV4163 Small-Engine Conventional style thermostat with inverse

Conventional style thermostat with inverse jiggle pin

Strong internal components such as springs and element assemblies

The extensive range of Wesfil fuel filters is a direct result of a wealth of technical and manufacturing expertise

Nose diameter: 39mm

Dayco Automatic Belt Tensioner APV4163 Small-Engine Conventional style thermostat with inverseDayco 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