Cloyes S977 Engine Timing Crankshaft Sprocket - Outer

Cloyes S977 Timing Crankshaft Sprocket

The Cloyes S977 is a metal engine timing crankshaft sprocket built for precise chain engagement and dependable operation in timing system service. It features a helical tooth form for quieter running and a precision-machined bore for a true fit during engine rebuilds and routine replacement work.

Compatible with select Ford, Lincoln, Mazda, and Mercury applications, including 2007-2010 Ford Edge and 2011 Ford Taurus outer timing positions, this sprocket is designed for engines that require accurate timing alignment and stable chain tracking.

Key Features

• Metal construction for engine timing service
• Helical tooth form for quiet operation
• Precision-machined bore for accurate fit
• 23-tooth design with 1-row chain configuration
• Keyway notch included for proper indexing
• Outer timing position application
• Part number: S977

Detailed Description

Cloyes S977 timing sprocket is engineered as part of the engine timing system, working with the timing chain, tensioners, and guides to maintain correct crankshaft timing. Cloyes uses CAD-based design, advanced materials, and functional durability testing to support consistent performance in engine rebuilds and replacement repairs. This part cross-references Ford OE number 7T4Z6306A for the same application.

Fits 2011-2012 Ford Fusion, outer; 2012 Ford Taurus, outer; 2008-2010 Ford Taurus, outer; 2011-2012 Lincoln MKZ, outer; 2011 Ford Flex, outer; 2011 Ford Taurus, outer; 2011 Lincoln MKS, outer; 2010-2011 Lincoln MKT, outer; 2011 Mazda 6, outer; 2011 Mazda CX-9, outer; 2007-2010 Ford Edge, outer; 2009-2010 Ford Flex, outer; 2010 Ford Fusion, outer; 2009-2010 Lincoln MKS, outer; 2007-2010 Lincoln MKX, outer; 2007-2010 Lincoln MKZ, outer; 2009-2010 Mazda 6, outer; 2007-2010 Mazda CX-9, outer; 2008-2009 Ford Taurus X, outer; 2008-2009 Mercury Sable, outer.

What It Helps Address

• Worn or damaged crankshaft sprocket teeth
• Timing chain noise from poor sprocket engagement
• Timing alignment issues during engine repair
• Chain tracking problems caused by worn timing components
• Repeat timing service when the sprocket shows wear

Installation Notes and Tips

Replace the timing chain tensioner(s), sprocket(s), and guide(s) together when servicing the chain, since these parts work as a system to keep the chain tight and properly aligned. Verify engine-specific application details before installation, especially on 2011 Ford Fusion, 2011 Ford Taurus, 2011 Lincoln MKS, 2011 Lincoln MKT, 2011 Lincoln MKZ, 2011 Ford Flex, 2011 Mazda 6, and 2011 Mazda CX-9 applications that note single-tooth water pump sprocket or production-date requirements.

Quality Assurance

Cloyes designs and manufactures timing components using CAD engineering and advanced materials, then tests each part for function and durability to support reliable engine service.