Cloyes S505 Engine Timing Crankshaft Sprocket - Center or Outer

Cloyes S505 Timing Crankshaft Sprocket

The Cloyes S505 is a steel engine timing crankshaft sprocket built for specific applications that require accurate chain engagement and stable timing operation. It features a helical tooth form for quieter running and a precision-machined bore for a true fit in the engine timing system.

Compatible with a wide range of Chevrolet, GMC, and Isuzu applications, including select Chevrolet S10, Blazer, Astro, and GMC Sonoma timing setups, this sprocket is designed for rebuilds and routine timing service where exact fitment matters.

Key Features

• Steel construction for durability in engine timing service
• Helical tooth design for quieter operation
• Precision-machined bore for accurate fit
• Specific-fit crankshaft sprocket for select applications
• 18-tooth design with 1.25 in. inside diameter
• Gray finish with keyway notch
• CAD-designed and manufactured using advanced materials
• Extensively tested for function and durability

Detailed Description

Cloyes S505 is an engine timing crankshaft sprocket engineered for the valve train and timing system. It works with the timing chain, tensioners, and guides to maintain proper chain tracking and timing accuracy. The steel construction, 0.53 in. thickness, 2.82 in. outside diameter, and 0.41 in. tooth width support consistent engagement in specific OE-style timing layouts.

This part cross-references 464617 and 8004646170 for the same application. It is a direct-fit timing sprocket for many Chevrolet and GMC trucks, vans, SUVs, and passenger cars, including applications such as Chevrolet S10, Chevrolet Blazer, GMC Sonoma, and Chevrolet Astro. Cloyes S505 is also listed for select outer and center positions depending on vehicle configuration.

Common Problems This Part Can Address

• Worn or damaged crankshaft sprocket teeth
• Timing chain noise from poor sprocket engagement
• Incorrect chain tracking in the timing system
• Timing service on high-mileage engines
• Engine rebuilds requiring a specific-fit sprocket

Installation Notes and Tips

Verify engine configuration, position, and tooth width before installation. Cloyes recommends replacing the chain tensioner, sprocket, and guide components together when servicing the timing chain, since these parts work as a system to keep chain tension and alignment correct. Confirm application details in the catalog for your exact Chevrolet, GMC, or Isuzu model before ordering.

Quality Assurance

Cloyes designs and manufactures timing components with CAD-based engineering and advanced materials, then tests each part for function and durability. The S505 is built to deliver reliable timing performance in rebuild and replacement service.