NGK 3306 Spark Plug - Exhaust Side

NGK Iridium IX Spark Plug Overview

The NGK Iridium IX Spark Plug 3306 is engineered for reliable ignition performance in a range of vehicles including Acura, Chevrolet, Ford, Honda, Mercedes-Benz, Mercury, Nissan, and Toyota models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Taper cut ground electrode tip design for improved spark exposure
• Copper core center electrode for optimal conductivity
• Nickel ground electrode core material with standard ground configuration
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.044 inches for precise spark gap
• Flat seat type with 5/8 inch hex size and 0.75 inch reach
• Manufacturer heat range rating of 5 suitable for various engine conditions

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, a material known for its high melting point and wear resistance. This product line focuses on delivering consistent spark and improved throttle response, making it suitable for vehicles requiring reliable secondary ignition components. The 3306 part number within this line features a copper core center electrode combined with an iridium tip, balancing conductivity and durability.

Technical Specifications and Features

This spark plug features a single ground electrode with a taper cut tip, which increases the spark exposure area and promotes better combustion efficiency. The center electrode is constructed with a copper core for excellent electrical conductivity, while the iridium tip ensures long-lasting performance under high temperatures. The ground electrode uses nickel core material, providing structural integrity. The spark plug has a flat seat type and a thread diameter of 14 mm, with a reach of 0.75 inches, making it compatible with specific engine designs.

Compatible Vehicles and Applications

• Acura Integra, Prelude, and other models
• Chevrolet Nova and other compatible vehicles
• Ford Escort, Lynx, and LN7 engines
• Honda CRX, Civic, and other models
• Mercedes-Benz SLK230
• Mercury models with compatible ignition systems
• Nissan 200SX, D21, Pathfinder, Pulsar NX, Sentra
• Toyota Camry, Celica, Corolla, Cressida, MR2, Supra

Common Issues Addressed by NGK Iridium IX Spark Plug 3306

• Engine misfires due to worn or fouled spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting the engine in cold conditions
• Rough idling or hesitation during acceleration
• Premature spark plug wear affecting engine performance

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 non-removable nut electrical terminal requires compatible ignition wires or connectors. Inspect the spark plug threads and seat for cleanliness to ensure proper sealing. Replacement intervals should follow vehicle manufacturer guidelines or when performance issues arise.

Quality Assurance and Warranty

NGK spark plugs, including the Iridium IX 3306, are manufactured to meet strict quality standards for durability and performance. The use of iridium and copper materials ensures resistance to wear and corrosion. While specific warranty details may vary, NGK products typically come with a limited warranty against manufacturing defects. Always consult the product documentation or vehicle service manual for warranty and maintenance information.