INA ZS-S812T Engine Timing Camshaft Sprocket

INA ZS-S812T Timing Camshaft Sprocket

The INA ZS-S812T engine timing camshaft sprocket is built for OE-style timing system service on select GM applications. It is a direct-fit cam sprocket for vehicles including Pontiac Grand Prix, Buick Regal, and Chevrolet Impala with the L67 engine.

Key Features

• Engine timing camshaft sprocket for valve train service
• INA quality construction using powdered metal, steel, or cast iron materials
• Heat treated to exact hardness specifications for consistent performance
• OE-quality replacement for timing gear and sprocket applications
• Cross-references INA Global Number 554 0517 100

Product Details

INA designs timing gears and sprockets to meet OE quality and performance expectations. The ZS-S812T is engineered for precise camshaft timing in compatible GM engines, helping maintain correct valve timing and dependable engine operation. This part number, ZS-S812T, is used across multiple Buick, Pontiac, Oldsmobile, and Chevrolet applications, including Pontiac Grand Prix, Buick Regal, and Chevrolet Impala models listed in the fitment data.

This part cross-references 5540517100 for the same application.

What It Helps Address

• Worn or damaged camshaft sprocket teeth
• Timing chain drive noise from sprocket wear
• Incorrect cam timing caused by a failing sprocket
• Service replacement during timing system repair
• Restoration of proper valve train synchronization

Installation Notes

Verify engine code and timing component alignment before installation. This sprocket is listed for camshaft use on the specified vehicles, including 2004-2005 Chevrolet Impala and 2004-2005 Chevrolet Monte Carlo with the L67 engine. Always inspect the full timing set, chain, guides, and related components during service.

Quality Assurance

INA timing sprockets are manufactured to OE-quality standards with controlled material selection and heat treatment for hardness consistency. The brand’s timing gear and sprocket line is built for precise fit and dependable timing system service.