INA ZS-S811 Engine Timing Crankshaft Sprocket

INA ZS-S811 Timing Crankshaft Sprocket

The INA ZS-S811 is an engine timing crankshaft sprocket built for select GM V6 applications. It is engineered to meet or exceed OE quality and performance expectations, with material and heat-treatment choices made for consistent timing system operation.

• Engine timing crankshaft sprocket for valve train service
• Made from powdered metal, steel, or cast iron depending on application design
• Heat treated to exact hardness specifications for durability
• OE-style replacement for timing gear service on select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles
• Part number: ZS-S811

Application Coverage

Compatible with a wide range of GM vehicles, including Fits 2005-2009 Buick Allure, N/A; Fits 2005-2009 Buick LaCrosse, N/A; Fits 2006-2008 Buick Lucerne, N/A; Fits 1997-2008 Pontiac Grand Prix, N/A; and Fits 2000-2005 Chevrolet Impala, N/A. Additional coverage includes Fits 2004-2005 Chevrolet Impala, N/A; Fits 2004-2005 Chevrolet Monte Carlo, N/A; Fits 1998-2005 Chevrolet Monte Carlo, N/A; Fits 1995-2005 Pontiac Bonneville, N/A; and Fits 1997-2004 Buick Regal, N/A.

More applications include Fits 1995-2002 Chevrolet Camaro, N/A; Fits 1995-2002 Pontiac Firebird, N/A; Fits 1996-1999 Buick Riviera, N/A; Fits 1998-1999 Chevrolet Lumina, N/A; Fits 1995-1999 Oldsmobile 88, N/A; Fits 1998-1999 Oldsmobile Intrigue, N/A; Fits 1996-1999 Oldsmobile LSS, N/A; Fits 1997-1998 Oldsmobile Regency, N/A; Fits 1995-1996 Oldsmobile 98, N/A; and Fits 1995 Chevrolet Lumina APV, N/A.

This part cross-references 5540802100 for the same application.

What This Part Helps Address

• Worn or damaged crankshaft timing gear teeth
• Timing chain drive noise caused by sprocket wear
• Incorrect cam/crank synchronization from a failing timing gear
• Service replacement needs during engine timing repair
• Restoration of proper timing system engagement on GM V6 engines

Installation Notes

Verify engine code and model-year fitment before ordering, since several vehicles in this range use different engine configurations. This sprocket is listed for N/A position applications and should be matched to the exact timing system design used in the vehicle. During timing service, inspect related components such as the chain, guides, tensioner, and seals so the repair is completed with the full system in mind.

Quality Assurance

INA timing gears and sprockets are manufactured to OE-level standards using controlled materials and hardness specifications. The ZS-S811 is built as a precision timing component for dependable engine service on supported Buick, Chevrolet, Oldsmobile, and Pontiac applications.