Dayco Automatic Belt Tensioner APV1080

Serpentine belt drives consist of a single belt that powers most, if not all, of the engine's accessories. Designed to maintain constant tension on serpentine belt drives, the Dayco Automatic Belt Tensioner features the original flat spring design engineered to provide less operating range variations in tension. This innovative design reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed and lessens the risk of belt noise and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A PTFE strip wound within the spring resists abrasion and the flat spring is coated to resist rust.Features include:- Steel locator pin (where the application demands)- Heavy duty cast aluminium spring case that resists cracking and fatigue- Heavy duty cast aluminium arm offers additional strength and less distortion- Steel pivot tube (where the application demands) provides additional strength for critical torque requirements- Thermoplastic rubber spring slot plug (where applicable) helps keep out harmful contaminants- Lubricated nylon pivot tube bushing and spring bushing for quieter performance- Rubber "O" ring which seals against dust and grime (where applicable)- Zinc-coated mounting bolt that resists rust