NGK 6988 Spark Plug

NGK Iridium IX Spark Plug Overview

The NGK Iridium IX Spark Plug 6988 is engineered for reliable ignition performance in select Acura, Honda, and Saab vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability
• Taper cut ground electrode tip design for improved spark exposure
• Copper core center electrode for optimal conductivity
• Standard ground configuration with nickel ground electrode core
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.044 inches for precise spark gap
• Flat seat type with 0.75-inch reach and 14mm thread diameter
• Hex size of 5/8 inch for installation compatibility
• Manufacturer heat range rating of 7

Iridium IX Spark Plug Product Line Details

The Iridium IX Spark Plug line by NGK is designed to provide enhanced ignition performance through the use of iridium-tipped center electrodes. This material choice offers improved wear resistance and a stable spark, which contributes to better combustion efficiency. The 6988 part number within this line maintains these characteristics while fitting specific Acura, Honda, and Saab models, ensuring compatibility and reliable operation.

Technical Description and Specifications

This NGK spark plug features a copper core center electrode with an iridium tip, combining excellent electrical conductivity with long-lasting durability. The taper cut ground electrode tip design increases spark exposure, which can improve ignition and combustion. The ground electrode is made from nickel, providing a balance of strength and corrosion resistance. With a pre-gap size of 0.044 inches and a flat seat type, this spark plug is engineered to meet the precise requirements of compatible engines. The non-removable nut electrical terminal ensures a secure connection, while the 5/8 inch hex size facilitates installation with standard tools.

Compatible Vehicles and Applications

• Acura Integra, RSX, and CSX models
• Honda Civic and S2000 models
• Saab 9-5 model

This spark plug is suitable for secondary ignition systems in these vehicles, supporting consistent engine starts and smooth running conditions.

Common Issues Addressed by NGK Iridium IX Spark Plug 6988

• Misfiring or rough idling due to worn spark plugs
• Reduced fuel efficiency from incomplete combustion
• Difficulty starting the engine in cold conditions
• Engine hesitation or loss of power under acceleration
• Increased emissions caused by inefficient ignition

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.044 inches as specified. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage to the threads or seat. The 5/8 inch hex size allows for compatibility with common spark plug sockets. Ensure the ignition system is off and the engine is cool before replacing spark plugs to prevent injury or damage.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. The Iridium IX Spark Plug 6988 is built with high-grade materials such as iridium and copper to withstand demanding engine conditions. While specific warranty details are not provided here, NGK typically offers coverage against manufacturing defects. Consult NGK or your parts provider for warranty information related to this part number.