Dayco Automatic Belt Tensioner Assembly (MPN: 89253)

Engineered for optimal performance and durability in serpentine belt systems.

The Dayco Automatic Belt Tensioner Assembly is designed to maintain consistent tension on serpentine belt drives, which power various engine accessories. Utilizing an original flat spring design, this tensioner minimizes operating range variations, thereby reducing the risk of premature accessory bearing failure due to excessive tension when a new belt is installed. Additionally, it addresses issues of belt noise and slippage that can arise from low tension as the belt stretches and wears over time.

Constructed with a heavy-duty cast aluminum spring case, the tensioner is built to resist cracking and fatigue, ensuring longevity and reliability. The inclusion of a steel pivot tube enhances strength for critical torque requirements, while a thermoplastic rubber spring slot plug protects against harmful contaminants. The lubricated nylon pivot tube bushing and spring bushing contribute to quieter operation, making this assembly a robust choice for maintaining serpentine belt systems.

With features such as a zinc-coated mounting bolt to resist rust and a rubber O-ring that seals against dust and grime, the Dayco Automatic Belt Tensioner Assembly is engineered for optimal performance in demanding conditions. This product is suitable for various applications requiring a serpentine belt system, ensuring that engine accessories operate efficiently and effectively.

Features

• Steel Locator Pin (Where The Application Demands)
• Heavy Duty Cast Aluminum Spring Case That Resists Cracking And Fatigue
• Heavy Duty Cast Aluminum 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 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
• Zinc-Coated Mounting Bolt That Resists Rust

Specifications

• Manufacturer: Dayco Products Inc
• Manufacturer Part Number: 89253
• Belt Type: Serpentine
• Maximum Belt Width: OEM
• Number Of Pulleys: 1
• Pulley Groove Count: 5
• Pulley Diameter: OEM
• Pulley Width: OEM
• Pulley Material: Glass Filled Polymer
• Tensioner Rotation: Counter Clockwise

Compatibility / Fit

• 2004-2007 Buick Rainier
• 2002-2008 Cadillac Escalade
• 2003-2008 Cadillac Escalade ESV
• 2002-2008 Cadillac Escalade EXT
• 2007-2008 Chevrolet Avalanche
• 2002-2006 Chevrolet Avalanche 1500
• 2003-2008 Chevrolet Express 1500
• 2003-2008 Chevrolet Express 2500
• 2003-2008 Chevrolet Express 3500
• 1999-2008 Chevrolet Silverado 1500
• 2007-2007 Chevrolet Silverado 1500 Classic
• 2001-2003 Chevrolet Silverado 1500 HD
• 2005-2006 Chevrolet Silverado 1500 HD
• 2007-2007 Chevrolet Silverado 1500 HD Classic
• 1999-2004 Chevrolet Silverado 2500
• 2001-2008 Chevrolet Silverado 2500 HD
• 2007-2007 Chevrolet Silverado 2500 HD Classic
• 2001-2006 Chevrolet Silverado 3500
• 2007-2007 Chevrolet Silverado 3500 Classic
• 2007-2008 Chevrolet Silverado 3500 HD
• 2003-2006 Chevrolet SSR
• 2000-2008 Chevrolet Suburban 1500
• 2000-2008 Chevrolet Suburban 2500
• 2000-2008 Chevrolet Tahoe
• 2006-2008 Chevrolet Trailblazer
• 2003-2006 Chevrolet Trailblazer EXT
• 2005-2008 GMC Envoy
• 2003-2006 GMC Envoy XL
• 2004-2005 GMC Envoy XUV
• 2003-2008 GMC Savana 1500
• 2003-2008 GMC Savana 2500
• 2003-2008 GMC Savana 3500
• 1999-2008 GMC Sierra 1500
• 2001-2003 GMC Sierra 1500 HD
• 2005-2006 GMC Sierra 1500 HD
• 2007-2007 GMC Sierra 1500 HD Classic
• 1999-2004 GMC Sierra 2500
• 2001-2008 GMC Sierra 2500 HD
• 2007-2007 GMC Sierra 2500 HD Classic
• 2001-2006 GMC Sierra 3500
• 2007-2007 GMC Sierra 3500 Classic
• 2007-2008 GMC Sierra 3500 HD
• 2000-2008 GMC Yukon
• 2000-2008 GMC Yukon XL 1500
• 2000-2008 GMC Yukon XL 2500
• 2003-2008 Hummer H2
• 2008-2008 Hummer H3
• 2003-2006 Isuzu Ascender
• 2005-2008 Saab 9-7x

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