Cloyes 9-3159AZ Engine Timing Set

Cloyes 9-3159AZ Timing Set for GM V8 Applications

The Cloyes 9-3159AZ engine timing set is built for specific GM applications that need precise valve timing control and durable chain drive components. It combines HEX-A-JUST adjustability with a double roller "Z" chain to support accurate cam timing on performance and street builds.

Key Features

• HEX-A-JUST cam timing adjustment with infinite fine-tuning of +/-6 degrees
• One-piece camshaft sprocket with billet eccentric camshaft dowel bushing
• Heat-treated billet steel sprockets for added durability
• TRUE Roller 0.250" roller diameter "Z" chain for reduced friction
• "Z" chain construction with increased strength over standard high-performance chain designs
• Captured needle camshaft sprocket thrust bearing to reduce block thrust surface friction
• 3-piece set hand-matched to help qualify center distance and minimize runout

Detailed Description

Cloyes 9-3159AZ is a specific-fit engine timing set for a wide range of GM trucks, SUVs, and performance cars, including Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Corvette applications. The adjustable HEX-A-JUST design lets you fine-tune valve timing in small increments, which is useful when dialing in camshaft events during engine assembly or rebuild work. The double roller chain design and heat-treated sprockets are selected for durability and consistent timing control in demanding use.

This part cross-references part number 93159A for the same application.

What It Helps Address

• Excessive timing chain stretch or wear
• Inaccurate cam timing after engine rebuilds
• Timing instability in higher-load GM V8 applications
• Friction losses in the cam drive system
• Runout or center-distance mismatch in timing set components

Installation Notes and Fitment

Compatible With specific GM applications listed below. Reduced-length chains in 0.005" and 0.010" versions are available by adding -5 or -10 to the end of the part number when required by the application.

• Fits 2004-2007 Buick Rainier, N/A; 3 bolt, 1 sensor hub; W/ "Z" chain; double roller type; HEX-A-JUST, with "Z" racing chain
• Fits 2006-2007 Cadillac CTS, N/A; 3 bolt, 1 sensor hub; W/ "Z" chain; double roller type; HEX-A-JUST, with "Z" racing chain
• Fits 2007 Chevrolet Avalanche, N/A; 3 bolt, 1 sensor hub; W/ "Z" chain; double roller type; HEX-A-JUST, with "Z" racing chain
• Fits 2005-2007 Chevrolet Corvette, N/A; 3 bolt, 1 sensor hub; W/ "Z" chain; double roller type; HEX-A-JUST, with "Z" racing chain
• Fits 1999-2007 Chevrolet Silverado 1500, N/A; 3 bolt, 1 sensor hub; W/ "Z" chain; double roller type; HEX-A-JUST, with "Z" racing chain
• Fits 2000-2007 GMC Yukon, N/A; 3 bolt, 1 sensor hub; W/ "Z" chain; double roller type; HEX-A-JUST, with "Z" racing chain
• Fits 2002-2006 Cadillac Escalade, N/A; 3 bolt, 1 sensor hub; W/ "Z" chain; double roller type; HEX-A-JUST, with "Z" racing chain
• Fits 2005-2006 Pontiac GTO, N/A; 3 bolt, 1 sensor hub; W/ "Z" chain; double roller type; HEX-A-JUST, with "Z" racing chain
• Fits 2005-2007 Saab 9-7x, N/A; 3 bolt, 1 sensor hub; W/ "Z" chain; double roller type; HEX-A-JUST, with "Z" racing chain

Verify the existing sensor hub and sprocket configuration before installation. The Cloyes 9-3159AZ is a direct-fit timing set for the listed applications and is commonly selected for Chevrolet Silverado 1500, GMC Sierra, and Corvette timing service.

Quality Assurance

Cloyes manufactures this timing set with heat-treated billet steel sprockets, a pre-stressed "Z" chain, and matched components to support consistent assembly quality and long-term durability in engine timing service.