Dayco No Slack Automatic Belt Tensioner Assembly

The Dayco No Slack Automatic Belt Tensioner Assembly is a drive belt tensioner (also called a serpentine belt tensioner or automatic tensioner) that keeps the correct tension on the accessory drive belt. Dayco engineered it to replace worn original tensioners and to help the belt drive run smoothly and quietly.

Key Features:

• Automatic spring-loaded design keeps belt tension steady as the belt wears and as engine load and temperature change
• Helps reduce belt slip, squeal, and vibration
• Includes a pulley and a tensioner arm assembly built for the drive system it replaces
• Made to meet or exceed OE form, fit, and function
• Helps protect other accessory drive parts, such as the alternator, water pump, and power steering pump, from the extra wear caused by incorrect belt tension

Dayco is a well-known supplier of belt drive, hose, and engine management parts to OE and aftermarket customers. A new tensioner is often installed together with a fresh serpentine belt to restore reliable accessory drive performance. Choose the specific part number for your application from the options on this page.