Dayco 89616 Automatic Belt Tensioner Assembly

The Dayco 89616 Automatic Belt Tensioner Assembly is engineered to maintain constant, precise tension on serpentine belt drive systems in GM LS-series V8 engines. This OE-quality tensioner is commonly used in Chevrolet Corvette, Camaro, and Caprice applications equipped with LS3 and L77 engines, as well as Holden Commodore and Calais models.

Patented Flat Spring Design:

• Provides less operating range variation compared to conventional coil spring tensioners
• Reduces risk of premature accessory bearing failure from excessive tension with new belts
• Minimizes belt squeal, slippage, and poor accessory performance as belts age and stretch
• PTFE strip wound within spring resists abrasion and dampens noise
• Corrosion-resistant coating protects flat spring from rust

Heavy-Duty Construction:

• Cast aluminum spring case and arm resist cracking, fatigue, and distortion
• Smooth surfaces and tight dimensional tolerances extend belt service life
• Lubricated bearings and high-temperature seals ensure peak performance
• Designed to withstand maximum drive demands in high-performance applications

This tensioner replaces GM part number 12569301 and is compatible with ACDelco 38328, Gates 38328, and other OEM equivalents. Dayco has been manufacturing premium automotive belt drive components since 1905, delivering proven reliability for both street and performance applications.