NGK 91039 Spark Plug

NGK Laser Iridium Spark Plug Overview

The NGK Laser Iridium Spark Plug 91039 is engineered for reliable ignition performance in select Buick and Chevrolet models. Designed with durable iridium and copper materials, this spark plug supports efficient combustion and consistent engine operation.

• Part Number: 91039 (Ifr7x7g)
• Center Electrode Tip Material: Iridium for enhanced durability
• Center and Ground Electrode Core Material: Copper for optimal conductivity
• Resistance: 6000 ohms to reduce electrical noise
• Pre-Gap Size: 0.028 inches for precise spark delivery
• Thread Diameter: 14.00 mm with 0.75 inch reach
• Flat Seat Type with standard ground electrode design
• Hex Size: 5/8 inch for standard installation tools
• Electrical Terminal Type: Non-removable nut
• Manufacturer Heat Range: 7 suitable for specified vehicle applications

About the NGK Laser Iridium Spark Plug Line

The Laser Iridium Spark Plug line from NGK combines iridium's high melting point with copper's excellent conductivity to provide a balance of durability and efficient ignition. This product line is designed to maintain stable performance over extended service intervals, making it suitable for modern engines requiring precise spark control.

Detailed Product Description

The NGK Laser Iridium Spark Plug 91039 features a single ground electrode with a standard tip design, constructed from copper to ensure effective heat dissipation and electrical conductivity. The center electrode tip is made of iridium, a material known for its hardness and resistance to wear, which contributes to longer service life and consistent spark quality. With a resistance rating of 6000 ohms, this spark plug helps minimize electromagnetic interference with vehicle electronics. The flat seat design and 14 mm thread diameter with a 0.75 inch reach ensure compatibility with specific Buick and Chevrolet models, including the Cruze, Cruze Limited, Encore, Sonic, and Trax.

Compatible Vehicles and Common Applications

• Replacement spark plug for Buick Encore and Chevrolet Trax
• Ignition component for Chevrolet Cruze and Cruze Limited
• Suitable for Chevrolet Sonic ignition systems
• Addresses issues such as misfires, rough idling, and poor fuel economy
• Helps maintain stable engine performance and emissions control

Installation Notes and Tips

• Ensure the spark plug gap is set to 0.028 inches before installation
• Use a 5/8 inch socket wrench for proper tightening
• Apply anti-seize compound sparingly on threads if recommended by vehicle manufacturer
• Torque to manufacturer specifications to avoid damage to the spark plug or cylinder head
• Inspect ignition wires and coils during replacement for optimal performance

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable ignition performance and durability. The Laser Iridium Spark Plug 91039 undergoes rigorous testing for heat range, resistance, and material integrity. While specific warranty details may vary, NGK products typically come with a limited warranty against manufacturing defects when installed according to guidelines.