Dayco 89840 Idler/Tensioner Pulley, Light Duty, 6-Groove Serpentine

The Dayco 89840 is a light duty idler/tensioner pulley (also called a drive belt idler pulley or accessory drive belt idler pulley). It guides and keeps tension on the serpentine belt in the accessory drive system. A worn idler pulley can cause belt rattle, squeal and bearing growl, and this pulley is a direct-fit replacement with a smooth-running bearing.

Key Features:

• Light duty idler/tensioner pulley for serpentine belt systems
• 6-groove pulley face
• Polymer pulley material

Replace the idler pulley when you replace a worn serpentine belt. This helps the belt run smoothly and avoids noise from a failing bearing.