Cloyes S851 Engine Timing Crankshaft Sprocket - Inner

Reliable Engine Timing Crankshaft Sprocket for Select GM Vehicles

The Cloyes S851 Engine Timing Crankshaft Sprocket is designed specifically for a range of Buick, Chevrolet, GMC, Oldsmobile, Pontiac, and Saturn models. Engineered from durable metal, this sprocket ensures precise timing and reliable performance in your vehicle's valve train system.

• Constructed from high-quality metal for durability
• Single chain row design with 42 teeth for accurate timing
• Gray finish with a 3.79" outside diameter and 0.43" thickness
• Includes a keyway notch and one mounting hole with 1.11" inside diameter
• Specific fit for models like Chevrolet Malibu, Pontiac G6, Buick LaCrosse, and more

Detailed Specifications and Design Features

The Cloyes S851 sprocket features a single chain row with a tooth width of 0.12 inches, optimized for precise engagement with the timing chain. Its 42-tooth count and 3.79-inch outside diameter are engineered to match exact OEM specifications, ensuring proper valve timing and engine efficiency. The sprocket’s thickness of 0.43 inches and gray metal finish contribute to its strength and resistance to wear. The inclusion of a keyway notch and a single mounting hole with a 1.11-inch inside diameter allows for secure installation and alignment within the engine assembly.

Compatible Vehicles and Applications

This engine timing crankshaft sprocket is compatible with specific models from Buick, Chevrolet, GMC, Oldsmobile, Pontiac, and Saturn. Notable compatible vehicles include the Chevrolet Malibu, Pontiac G6, Buick LaCrosse, Saturn Vue, and Chevrolet Equinox among others. The part number S851 ensures you receive the exact replacement designed for your vehicle’s valve train system.

• Corrects timing chain slippage and misalignment issues
• Replaces worn or damaged sprockets to restore engine timing accuracy
• Prevents premature wear on timing components
• Helps maintain optimal engine performance and fuel efficiency
• Addresses noise or vibration related to timing chain engagement

Installation Notes and Tips

Installation of the Cloyes S851 sprocket requires proper alignment with the timing chain and crankshaft. Ensure the keyway notch is correctly positioned to maintain timing accuracy. It is recommended to inspect the timing chain and related components during installation to avoid future issues. Use appropriate torque specifications for the mounting bolt to secure the sprocket firmly without causing damage.

Quality Assurance and Warranty

Cloyes manufactures the S851 sprocket to meet or exceed OEM standards, providing reliable performance and durability. The metal construction and precise machining contribute to long service life. While specific warranty details may vary, Cloyes products typically come with a limited warranty against defects in materials and workmanship, offering confidence in your replacement part.