Dayco Heavy Duty Automatic Belt Tensioner Assembly

The Dayco No Slack Heavy Duty Automatic Belt Tensioner Assembly keeps the serpentine (accessory drive) belt at the right tension. A serpentine belt drives most, if not all, of the engine's accessories. This automatic drive belt tensioner is built for heavy duty applications and is a direct replacement for a worn or failing tensioner.

Key Features:

• Constant tension: Dayco's original flat spring design keeps tension steady across the operating range, with less variation than a typical tensioner.
• Protects accessories: Controlled tension helps prevent early accessory bearing failure from excess tension when a new belt is installed.
• Less slippage and noise: Proper tension after the belt begins to stretch and wear helps limit belt slip, noise and poor accessory performance.
• Heavy duty construction: It is engineered for the demands of truck, commercial and other hard-working applications.
• Automatic operation: The tensioner adjusts on its own, so no manual tension adjustment is needed.

Replacing a worn tensioner along with the serpentine belt helps restore smooth, quiet and reliable accessory drive operation. Pulley size, spring direction and mounting details differ by part number, so choose the specific item that matches your application.