Dayco 89655 Accessory Drive Belt Tensioner Assembly - Left

Overview of Dayco Accessory Drive Belt Tensioner Assembly 89655

The Dayco 89655 accessory drive belt tensioner assembly is designed for reliable serpentine belt tensioning in select Ford and Lincoln vehicles. This automatic tensioner supports smooth operation of the accessory drive system, ensuring consistent belt tension and reducing wear.

• Serpentine belt type compatible
• Clockwise rotation direction
• Single pulley design with 70 mm diameter
• Pulley width of 26 mm with flat surface
• Automatic tensioner for consistent belt pressure

Technical Details and Specifications

This Dayco accessory drive belt tensioner assembly features a single pulley with a 70 mm diameter and a 26 mm wide flat pulley surface, optimized for serpentine belt applications. The tensioner operates in a clockwise direction, providing precise tension control automatically without manual adjustment. Its design supports accessory drive systems in various Ford and Lincoln models, including the Expedition, F-150, Mustang, Navigator, and Transit series (Transit-150, Transit-250, Transit-350, Transit-350 HD).

Compatible Vehicles and Applications

The Dayco 89655 tensioner assembly is compatible with multiple Ford and Lincoln vehicles, specifically:

• Ford Expedition
• Ford F-150
• Ford Mustang
• Lincoln Navigator
• Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD

This part is essential for maintaining proper serpentine belt tension in these models, contributing to the efficient operation of engine accessories such as the alternator, power steering pump, and air conditioning compressor.

Common Issues Addressed by the Tensioner Assembly

• Eliminates belt slippage and squealing noises
• Prevents premature serpentine belt wear
• Maintains consistent accessory drive performance
• Reduces risk of belt misalignment
• Improves overall engine accessory reliability

Installation Notes and Tips

When installing the Dayco 89655 tensioner assembly, ensure the serpentine belt is properly routed according to the vehicle’s belt diagram. The automatic tensioner requires no manual adjustment but verify the pulley rotates clockwise as specified. Inspect the belt and other drive components for wear during installation to ensure optimal system performance.

Quality Assurance and Warranty

Dayco manufactures the 89655 accessory drive belt tensioner assembly to meet OEM specifications for durability and performance. This part undergoes rigorous quality control to ensure reliable operation in Ford and Lincoln vehicles. Warranty coverage details should be confirmed with the original product documentation or authorized distributors.