INA ZS-S721 Engine Timing Crankshaft Sprocket

Engine Timing Crankshaft Sprocket for Dodge and Jeep

INA ZS-S721 is an engine timing crankshaft sprocket built for select Dodge and Jeep applications from 1990-2003. It is made to OE-quality standards using powdered metal, steel, or cast iron construction with heat treatment to exact hardness specifications.

Key Features

• Engine timing crankshaft sprocket for valve train service
• OE-quality fit and performance focus
• Constructed from powdered metal, steel, or cast iron, depending on application
• Heat treated to precise hardness specifications
• Fits a wide range of Dodge Dakota, Ram, and Jeep Grand Cherokee applications

Detailed Description

INA ZS-S721 is a timing gear/sprocket designed for engine timing service on select Dodge Dakota, Dodge Durango, Dodge Ram 1500, Dodge Ram 2500, Dodge Ram 3500, and Jeep Grand Cherokee models. This crankshaft sprocket is engineered to match OE-level requirements for material strength and dimensional accuracy, helping maintain proper timing system operation in engines that rely on precise crankshaft-to-camshaft synchronization. Part number ZS-S721 also cross-references 5540785100 for the same application.

Compatible With 1990-2003 Dodge Dakota, 1998-2003 Dodge Durango, 1994-2003 Dodge Ram 1500, 1999-2003 Dodge Ram 1500 Van, 1999-2003 Dodge Ram 2500 Van, 1999-2003 Dodge Ram 3500 Van, 1994-2002 Dodge Ram 2500, 1994-2002 Dodge Ram 3500, 1995-1998 Dodge B1500, 1995-1998 Dodge B2500, 1995-1998 Dodge B3500, 1993-1998 Jeep Grand Cherokee, 1990-1994 Dodge B150, 1990-1994 Dodge B250, 1990-1994 Dodge B350, 1990-1993 Dodge D150, 1990-1993 Dodge D250, 1990-1993 Dodge D350, 1990-1993 Dodge Ramcharger, 1990-1993 Dodge W150, 1990-1993 Dodge W250, 1990-1993 Dodge W350, and 1993 Jeep Grand Wagoneer.

Common Repair Uses

• Replacing a worn or damaged crankshaft sprocket during timing service
• Restoring proper timing chain or timing gear engagement
• Addressing timing noise caused by sprocket wear
• Correcting timing alignment issues after engine teardown
• Servicing high-mileage Dodge and Jeep engines with timing wear

Installation Notes and Tips

Verify engine code and timing system configuration before installation. Inspect the timing chain, guides, tensioner, and related components at the same time, since sprocket wear often occurs alongside other timing system wear. Follow factory timing marks and service procedures closely to maintain correct engine timing on Dodge Dakota, Ram, Durango, and Jeep Grand Cherokee applications.

Quality Assurance

INA timing gears and sprockets are manufactured to meet or exceed OE quality expectations. The brand uses controlled materials and heat treatment processes to support consistent hardness and durability in engine timing applications.