INA ZC-78337 Engine Timing Set

INA Timing Chain Kit for GM V8 Applications

INA ZC-78337 is a premium engine timing set built for select Chevrolet and GMC trucks, vans, and chassis applications from 1996-1999. It is engineered as a timing chain kit with the essential chain components needed for a proper repair, including chain guides and a premium-grade design.

Key Features

• Premium engine timing set for select GM applications
• Chain guides included for a complete timing service
• Single roller chain design noted in fitment details
• Engine timing kit format for organized replacement work
• INA part number ZC-78337 for easy identification
• Cross-reference: 5591743100

Product Details

INA ZC-78337 is a timing chain kit from INA, a Schaeffler brand known for engine valvetrain components. This kit is built around the core timing chain service parts and, in this application, includes the chain guides needed to restore timing system function. The manufacturer notes that INA timing chain kits are assembled to cover the essential components required for a correct repair on the first service attempt. For this application, the kit is listed with a single roller .334 chain specification and is cataloged for 1996-1999 Chevrolet C2500, C2500 Suburban, K2500, K2500 Suburban, and P30, plus 1997-1999 Chevrolet C3500 and 1996-1999 Chevrolet Express 3500. It also covers 1996-1999 GMC C2500, C2500 Suburban, K2500, K2500 Suburban, K3500, and Savana 3500, along with 1996-1999 GMC C3500 and 1997-1999 GMC P3500. If you are searching for an INA timing chain kit for Chevrolet C2500 or GMC Savana 3500 applications, ZC-78337 is the cataloged part number to verify.

What It Helps Address

• Timing chain noise from worn chain components
• Excessive chain slack affecting cam timing accuracy
• Worn or damaged timing chain guides
• Service replacement for high-mileage timing systems
• Restoration of proper valvetrain synchronization

Installation Notes and Tips

Confirm engine code, chain style, and application details before ordering, since timing components must match the exact engine configuration. Replace related timing wear items during service as needed, and inspect sprockets, seals, and mating surfaces for wear or damage before reassembly. This kit includes chain guides, while the cataloged attributes indicate the tensioner, gaskets, and drive sprocket are not included.

Quality Assurance

INA timing components are part of Schaeffler’s engine management portfolio and are cataloged as premium-grade parts for valvetrain service. ZC-78337 is listed with the manufacturer’s timing kit content and application data to support accurate parts selection for Chevrolet and GMC timing chain repairs.