Cloyes 9-3158A Engine Timing Set

Cloyes 9-3158A Hex-A-Just Timing Set

The Cloyes 9-3158A engine timing set is built for specific GM and related V8 applications that use a 3-bolt, 1-sensor-hub configuration. It combines adjustable cam timing with a single roller chain design to help dial in engine timing for performance-focused builds.

Key Features

• HEX-A-JUST design provides infinite valve timing adjustability within +/-6 degrees
• One-piece camshaft sprocket with a billet eccentric camshaft dowel bushing
• Heat-treated billet steel sprockets for added durability
• TRUE Roller chain with 0.250" roller diameter to reduce friction
• Captured needle camshaft sprocket thrust bearing to minimize friction
• Hand-matched set to help qualify center distance and reduce runout
• Single chain type for specific-fit engine timing applications

Product Details

Cloyes 9-3158A is a specific-fit engine timing set for a wide range of Chevrolet, GMC, Cadillac, Buick, Pontiac, Saab, Hummer, and Isuzu vehicles. It is engineered for applications such as Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Corvette models that require a 3-bolt, 1 sensor hub, Hex-A-Just, single roller type engine timing set. The adjustable cam sprocket design gives tuners and rebuilders a precise way to set valve timing for engine output calibration while the roller chain and thrust-bearing arrangement help reduce internal friction.

This part cross-references 93158A for the same application.

Common Uses

• Correcting cam timing during engine rebuilds
• Setting valve timing for performance tuning
• Replacing worn timing components in high-mileage engines
• Addressing timing chain stretch or sprocket wear
• Restoring accurate cam-to-crank synchronization

Installation Notes

Compatible With 1997-2007 Chevrolet Corvette, N/A; 1998-2002 Chevrolet Camaro, N/A; 1998-2002 Pontiac Firebird, N/A; 1999-2007 Chevrolet Silverado 1500, N/A; 1999-2007 GMC Sierra 1500, N/A; 2000-2007 Chevrolet Tahoe, N/A; 2000-2007 GMC Yukon, N/A; 2001-2007 Chevrolet Silverado 2500 HD, N/A; 2001-2007 GMC Sierra 2500 HD, N/A; 2002-2006 Cadillac Escalade, N/A; 2003-2007 Chevrolet Express 1500, N/A; 2003-2007 GMC Savana 1500, N/A; 2004-2006 Pontiac GTO, N/A; 2005-2007 Saab 9-7x, N/A; 2006-2007 Cadillac CTS, N/A; 2006-2007 Chevrolet Impala, N/A; 2006-2007 Chevrolet Monte Carlo, N/A; 2006-2007 Chevrolet Trailblazer, N/A; 2006-2007 GMC Envoy, N/A; 2007 Chevrolet Avalanche, N/A; 2007 GMC Sierra, N/A.

Verify the engine’s 3-bolt, 1 sensor hub timing setup before ordering. This Cloyes timing set is application-specific, so matching the engine configuration is essential for proper fitment and timing alignment.

Quality Assurance

Cloyes manufactures this timing set with heat-treated billet steel sprockets, a captured needle thrust bearing, and hand-matched components to support consistent fit and reduced runout in the intended applications.