NGK 91970 Spark Plug

Reliable Ignition Performance for Buick, Chevrolet, and GMC Vehicles

The NGK Laser Iridium Spark Plug 91970 is engineered to deliver consistent ignition and efficient combustion for select Buick, Chevrolet, and GMC models. Designed with durable materials and precise specifications, this spark plug supports optimal engine performance and fuel efficiency.

• Iridium center electrode tip for enhanced durability and ignition
• Copper core materials in both center and ground electrodes for improved conductivity
• Standard ground electrode tip and configuration for reliable spark delivery
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.028 inches optimized for efficient combustion
• Tapered seat type and 14mm hex size for proper fit and installation
• Manufacturer heat range rating of 8 suitable for specified vehicle applications
• Thread diameter of 12mm and reach of 25mm for precise fitment

About the NGK Laser Iridium Spark Plug Line

The Laser Iridium Spark Plug line from NGK combines iridium's high melting point with advanced manufacturing techniques to provide long-lasting spark plugs that maintain stable ignition over time. This product line focuses on delivering consistent performance and durability, making it suitable for modern engines requiring precise ignition components. The 91970 part number is part of this line, ensuring compatibility with specific Buick, Chevrolet, and GMC models.

Technical Details and Specifications

The NGK 91970 spark plug features a copper core in both the center and ground electrodes, which enhances electrical conductivity and heat dissipation. The iridium tip on the center electrode improves wear resistance and ignition reliability. With a resistance rating of 5000 ohms, it helps reduce electrical noise interference. The spark plug has a single ground electrode with a standard tip design and configuration, ensuring consistent spark generation. Its tapered seat and 14mm hex size facilitate proper sealing and ease of installation. The insulator height is 52.5mm, and the pre-gap is set at 0.028 inches, optimized for the combustion chamber design of compatible vehicles.

Compatible Vehicles and Common Applications

• Replacement spark plug for Buick Cascada and Encore models
• Suitable for Chevrolet Cruze, Malibu, Equinox, Trailblazer, and Trax
• Compatible with GMC Terrain and Envista models
• Addresses ignition misfires and rough idling in these vehicles
• Helps improve fuel efficiency and engine responsiveness

Installation Notes and Tips

Ensure the engine is cool before removing old spark plugs. Use a torque wrench to tighten the NGK 91970 spark plug to the manufacturer’s recommended specifications to avoid damage. The 14mm hex size allows for standard spark plug sockets. Verify the pre-gap of 0.028 inches before installation, although it is preset from the factory. Avoid over-tightening to maintain the integrity of the tapered seat and prevent thread damage.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Laser Iridium Spark Plug 91970 undergoes rigorous testing for fitment and electrical properties. While specific warranty details are not provided here, NGK typically offers coverage against manufacturing defects. Refer to NGK’s official documentation for warranty terms.