INA ZC-2540S Engine Timing Gear Set

INA Timing Chain Kit ZC-2540S

INA ZC-2540S is a timing chain kit for select GM and Pontiac applications from 1976-1983. It brings together the core timing components needed for a proper engine timing service, with fitment coverage for Chevrolet C10, K10, Camaro, Impala, and related light-duty vehicles.

This kit is built around the timing chain service requirements for classic Chevrolet and GMC engines, including applications such as Chevrolet C10 timing chain kit replacement and GMC Jimmy engine timing repair. The INA ZC-2540S part number is also referenced under global number 554 0935 200.

Key Features

• Complete timing chain kit for select engine timing repairs
• Includes the necessary chains, tensioners, and guides
• Some applications also include gears and sprockets
• High-performance chain additive is included in certain kits
• Additive is formulated to reduce break-in friction and lower run-in wear
• Cross-reference part number: 5540935200

Detailed Description

INA timing chain kits are assembled to cover the essential components involved in a timing service, helping restore correct chain operation and timing control. Depending on the application, the kit may also include the required gears and sprockets. The included chain additive is specially formulated for Schaeffler by Liqui Moly and is used during break-in to reduce friction and wear.

Compatible With select 1976-1983 Chevrolet C10, Chevrolet C20, Chevrolet G10, Chevrolet K10, Chevrolet K5 Blazer, Chevrolet Camaro, Chevrolet Caprice, Chevrolet Impala, Chevrolet Nova, GMC C1500, GMC G1500, GMC Jimmy, Pontiac Catalina, and related models listed in the fitment data. For buyers searching for an INA timing chain kit for Chevrolet C10 or a GMC Jimmy timing gear set, ZC-2540S is the referenced part number.

What It Is Used For

• Replacing a stretched or worn timing chain
• Restoring camshaft and crankshaft timing accuracy
• Addressing chain noise from worn guides or tensioners
• Repairing timing wear during a full engine service
• Servicing classic GM light-duty trucks and passenger cars

Installation Notes and Tips

Verify engine code, timing cover configuration, and stamped gear markings before installation. Some listed applications require specific cam and crank gear markings, including GM20 and 20 on certain Pontiac and Oldsmobile fitments. Confirm the vehicle against the fitment list before ordering, especially on Chevrolet Camaro, Chevrolet Impala, and GMC Jimmy applications.

Quality Assurance

INA timing chain kits are built to include the core components needed for a complete timing repair, with application-specific coverage based on OE-style requirements. The included break-in additive is engineered to reduce initial friction and wear during the first miles after installation.