Cloyes S431 Engine Timing Crankshaft Sprocket

Cloyes S431 Timing Crankshaft Sprocket

The Cloyes S431 is an engine timing crankshaft sprocket built for specific Ford, Lincoln, and Mercury applications. It features a helical tooth form for quieter operation and a precision-machined bore for accurate fit during timing system service.

Key Features

• Engine timing crankshaft sprocket for specific fitment
• Metal construction with gold finish
• 21-tooth design with 0.40" tooth width
• Precision-machined bore for true fit
• Helical tooth form for quiet operation
• Single-row chain design
• Keyway notch included
• CAD designed and manufactured using advanced materials

Product Details

Cloyes Timing Crankshaft Sprocket S431 is part of the timing system that works with the chain, tensioners, and guides to maintain proper camshaft and crankshaft synchronization. Cloyes builds this timing sprocket for engine rebuilds and routine replacement work, with extensive testing for function and durability. This part cross-references D50Z6306A for the same application. Compatible Ford Mustang, Ford F-150, Ford Bronco, Mercury Cougar, and Lincoln Town Car applications are included across the listed fitment range.

Common Repair Applications

• Timing chain noise from worn sprocket teeth
• Incorrect chain engagement during engine service
• Timing system wear in high-mileage Ford, Lincoln, and Mercury engines
• Restoration or rebuild work requiring a specific-fit crankshaft sprocket
• Replacement of a damaged or corroded timing sprocket

Installation Notes

Verify engine application before installation, since fitment varies by year, model, and engine configuration. Cloyes recommends replacing the chain tensioner(s), sprocket(s), and guide(s) when the timing chain is replaced. Use the application notes carefully, including listings such as oil slinger not required, standard duty engine, silent timing chain, and early-1972 or late-production references where shown.

Fits 1965-1988 Ford Bronco, N/A; Fits 1975-1988 Ford F-150, N/A; Fits 1966-1973 Ford Mustang, N/A; Fits 1977-1988 Ford Thunderbird, N/A; Fits 1981-1988 Lincoln Town Car, N/A; Fits 1967-1970 Mercury Cougar, N/A.

Quality Assurance

Cloyes designs this timing sprocket with CAD engineering, advanced materials, and application testing to support reliable operation in engine rebuild and replacement service. The precision-machined bore and helical tooth profile reflect the brand’s focus on fit and timing-system consistency.