ACDelco 12747406 GM OE Cylinder Head Gasket

The ACDelco 12747406 is a GM Original Equipment cylinder head gasket engineered to meet the exact specifications of the original component it replaces. As a true OE part, it is designed, validated, and backed by General Motors to deliver the precise fit, form, and function required for proper engine sealing.

The cylinder head gasket performs a critical role in engine integrity: it seals the combustion chambers and contains the extreme heat and pressure generated during combustion, while simultaneously sealing the coolant and oil passages that pass between the cylinder head and the engine block. A compromised head gasket can result in coolant loss, oil contamination, compression leaks, or engine overheating — making quality of replacement essential.

Key Features:

• GM Original Equipment part — the same gasket used in factory production or validated by GM engineers
• Multi-layer steel (MLS) construction provides spring-like sealing performance under cyclic head-lift during combustion
• Engineered to withstand high-torque, high-pressure loads across extreme temperature cycles
• Seals combustion chambers, coolant passages, and oil galleries between the cylinder head and engine block
• Direct OE replacement — no modifications required for installation
• Manufactured to GM OE specifications for guaranteed fit and function

ACDelco GM Original Equipment parts are the recommended replacement components for GM vehicles, ensuring the reliability and durability expected from the factory. This gasket is sold individually.