INA ZS-2501 Engine Timing Crankshaft Sprocket

INA ZS-2501 Engine Timing Crankshaft Sprocket

The INA ZS-2501 is an engine timing crankshaft sprocket built for classic GM and Pontiac applications that need accurate timing gear engagement and dependable OE-style performance. It is a direct-fit timing component for a wide range of Chevrolet, GMC, Oldsmobile, and Pontiac vehicles from the 1950s through the mid-1970s.

Key Features

• Engine timing crankshaft sprocket for valve train service
• Made to meet or exceed OE quality and performance expectations
• Constructed from powdered metal, steel, or cast iron depending on application design
• Heat treated to exact hardness specifications for durability
• Fits a broad range of classic Chevrolet C10, Camaro, Nova, and related models
• Part number: ZS-2501

Detailed Description

INA timing gears and sprockets are engineered for precise fit and consistent operation in the engine timing system. The ZS-2501 is designed for vehicles such as the Chevrolet C10, Camaro, and Nova, along with other listed Chevrolet, GMC, Oldsmobile, and Pontiac applications. If you are servicing a classic GM engine and need an OE-style crankshaft sprocket, INA ZS-2501 provides the timing gear interface required for proper camshaft synchronization.

This part cross-references INA Global Number 554 0366 100 for the same application. The ZS-2501 part number is also useful when searching for a replacement crankshaft sprocket for vintage Chevrolet Bel Air, Impala, and El Camino timing service.

What It Helps Address

• Worn or damaged crankshaft sprocket teeth
• Timing chain engagement issues
• Incorrect camshaft-to-crankshaft synchronization
• Noise caused by timing gear wear
• Restoration or maintenance of original-style engine timing components

Installation Notes and Tips

Verify engine application, timing set design, and tooth configuration before installation. Inspect the timing chain, camshaft sprocket, and related valve train components at the same time to avoid repeat service. Proper alignment during installation is critical for accurate engine timing and reliable operation.

Quality Assurance

INA timing sprockets are manufactured to OE-level standards using controlled materials and heat treatment processes to support consistent hardness and wear resistance. The ZS-2501 is built for dependable fitment in listed classic GM applications.