Gates 38257 Accessory Drive Belt Tensioner Assembly - Serpentine

Overview of Gates DriveAlign Premium OE Automatic Belt Tensioner

The Gates DriveAlign Premium OE Automatic Belt Tensioner (Part Number 38257) is engineered for reliable accessory drive belt system performance. Designed specifically for Ford vehicles such as the E-350 Club Wagon, E-350 Super Duty, Excursion, F-250 Super Duty, and F-350 Super Duty, this tensioner assembly ensures proper belt tension and alignment.

• Constructed from durable steel for long-lasting strength
• Includes two pulleys: one flanged and one non-flanged
• Compatible with V-ribbed belt types featuring 0 and 8 grooves
• Precision bearing bore inside diameter of 17 mm (.67 in) for smooth operation
• Outside pulley diameter of 76 mm (2.99 in) with widths ranging from 37 to 38 mm (1.46 to 1.5 in)
• Comes complete with tensioner assembly and mounting bolt
• Two mounting holes for secure installation

Detailed Product Description

This accessory drive belt tensioner assembly is designed to maintain optimal tension on V-ribbed belts, which are common in Ford heavy-duty trucks and vans. The assembly features two pulleys: one with a flange and one without, accommodating different belt routing requirements. Both pulleys have a smooth backside contact surface and a v-ribbed grooved surface to ensure proper belt grip and alignment. The steel construction provides durability under demanding engine conditions, while the precise bearing bore diameter of 17 mm (.67 in) supports smooth rotation and reduces wear.

The Gates DriveAlign Premium OE Automatic Belt Tensioner is engineered to meet original equipment (OE) performance standards, ensuring compatibility and reliable operation in Ford E-350 Club Wagon, E-350 Super Duty, Excursion, F-250 Super Duty, and F-350 Super Duty models. The included mounting bolt and two mounting holes simplify installation and secure fitment.

About the DriveAlign Premium OE Automatic Belt Tensioner Line

The DriveAlign Premium OE Automatic Belt Tensioner product line by Gates focuses on delivering OE-level performance and durability. These tensioners are designed to provide consistent belt tension and alignment, reducing belt slip and premature wear. This line is tailored for professional repair and maintenance applications, ensuring compatibility with specific vehicle makes and models, including Ford heavy-duty trucks and vans.

Common Applications and Issues Addressed

• Maintains proper tension on V-ribbed accessory drive belts
• Prevents belt slippage and noise in Ford Super Duty and E-350 models
• Reduces premature belt and pulley wear caused by misalignment
• Addresses belt tensioner failure symptoms such as squealing or belt flutter
• Supports reliable operation of engine accessories like alternators and power steering pumps

Installation Notes and Tips

• Ensure compatibility with Ford E-350 Club Wagon, E-350 Super Duty, Excursion, F-250 Super Duty, and F-350 Super Duty before installation
• Use the included mounting bolt and verify the two mounting holes align properly
• Inspect the belt for wear and replace if necessary during tensioner installation
• Follow vehicle manufacturer torque specifications for mounting hardware
• Check belt alignment and tension after installation to confirm proper operation

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner (Part Number 38257) is manufactured to meet OE performance standards, ensuring durability and reliable function. Gates provides quality assurance through rigorous testing and material standards. Warranty coverage details should be confirmed with the product documentation or supplier.