Denso 3373 Spark Plug

Overview of Denso Iridium Long Life Spark Plug 3373

The Denso Iridium Long Life spark plug 3373 is engineered for reliable ignition performance in Mitsubishi vehicles, specifically the Eclipse and Galant models. Designed with advanced materials, this spark plug supports efficient combustion and long service intervals.

• Iridium center electrode tip for enhanced durability
• Platinum chip ground electrode tip for stable ignition
• Copper core center electrode for improved conductivity
• Standard ground configuration with nickel ground electrode core
• Pre-gap size of 0.8 mm optimized for ignition efficiency
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16.0 mm for standard installation tools
• Manufacturer heat range rating of 20 for balanced thermal performance
• Resistance value of 5000 ohms to reduce electrical noise

Detailed Product Features and Materials

This Denso spark plug 3373 features an iridium center electrode tip, known for its high melting point and wear resistance, which contributes to longer service life and consistent spark delivery. The copper core center electrode enhances electrical conductivity, improving ignition efficiency. The ground electrode incorporates a platinum chip tip, which stabilizes the spark and reduces electrode wear. The nickel core material in the ground electrode provides structural strength. With a pre-gap size of 0.8 mm, this spark plug is optimized for precise ignition timing and combustion. The flat seat design ensures a secure fit in the cylinder head, while the 14 mm thread diameter and 19 mm reach match OEM specifications for Mitsubishi Eclipse and Galant models.

About the Iridium Long Life Product Line

The Iridium Long Life line from Denso focuses on durability and consistent ignition performance. Utilizing iridium and platinum materials in critical electrode areas, this product line is designed to extend spark plug life and maintain stable combustion over time. The 3373 spark plug benefits from this technology, offering a balance of longevity and reliable ignition suited for secondary ignition systems in Mitsubishi vehicles.

Compatible Vehicles and Common Applications

• Replacement spark plug for Mitsubishi Eclipse models
• Replacement spark plug for Mitsubishi Galant models
• Addresses issues such as misfires, rough idling, and poor fuel economy
• Helps resolve ignition hesitation and starting difficulties
• Suitable for maintenance and performance restoration in secondary ignition systems

Installation Notes and Tips

When installing the Denso 3373 spark plug, ensure the pre-gap of 0.8 mm is maintained or adjusted according to vehicle specifications. Use a 16 mm socket wrench for proper torque application. The flat seat design requires careful seating to avoid leaks or misalignment. It is recommended to replace spark plugs in sets to maintain consistent engine performance. Always consult the Mitsubishi Eclipse or Galant service manual for torque specifications and installation procedures.

Quality Assurance and Warranty

Denso spark plugs, including the 3373 model, are manufactured to meet OEM standards for fit, form, and function. The use of iridium and platinum materials ensures durability and resistance to electrode wear. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliable operation in compatible Mitsubishi vehicles.