Dayco 85017 Hydraulic Timing Belt Tensioner Actuator

The Dayco 85017 Hydraulic Timing Belt Actuator is a precision-engineered component designed to maintain constant tension on your engine's timing belt throughout its service life. Also known as a hydraulic tensioner, this critical engine component absorbs changes in timing belt tension that occur due to variations in engine temperature, operating speed, and normal belt wear and aging.

Key Features:

• Maintains constant belt tension during crankshaft revolution
• Reduces engine noise and prevents timing belt flapping
• Ensures proper timing transmission efficiency throughout belt service life
• Designed for engines with water pump driven by timing belt
• Manufactured to meet OE quality, form, fit, and function requirements
• Direct replacement for OEM part number 4667283

This hydraulic timing belt actuator is especially important for interference engines where timing belt failure can cause catastrophic engine damage. By preventing loss of tension that could lead to belt slippage or failure, the Dayco 85017 helps protect your engine investment. Cross-references include Gates T43191, Cloyes 9-5499, and CARQUEST 85017.