Denso 3423 Spark Plug

Overview of Denso Iridium Long Life Spark Plug 3423

The Denso Iridium Long Life spark plug 3423 is engineered for reliable ignition performance in select Isuzu vehicles. Designed specifically for models like the Isuzu Axiom and Rodeo, this spark plug offers durability and consistent spark delivery to support efficient engine operation.

• Iridium center electrode tip for enhanced durability
• Platinum chip ground electrode tip design
• Copper core center electrode for improved conductivity
• Standard ground configuration with nickel core ground electrode
• Pre-gap size of 0.9 mm for optimal spark gap
• Flat seat type with 12 mm thread diameter and 26.5 mm reach
• Hex size of 16.0 mm for installation compatibility
• Manufacturer heat range rating of 16
• Resistance value of 5000 ohms to reduce electrical noise

Detailed Features and Specifications

This Denso spark plug features an iridium center electrode tip, known for its high melting point and wear resistance, which contributes to longer service life and stable ignition. The copper core center electrode enhances thermal conductivity, helping to dissipate heat efficiently. The ground electrode incorporates a platinum chip tip and a nickel core, providing a balance of durability and reliable spark formation. The spark plug’s pre-gap size is set at 0.9 mm, ensuring optimal spark intensity and combustion efficiency.

With a flat seat type and a thread diameter of 12 mm, this spark plug fits securely in the combustion chamber. The 26.5 mm reach and 16.0 mm hex size are designed for compatibility with Isuzu Axiom and Rodeo engines. The manufacturer heat range of 16 indicates its suitability for specific engine operating temperatures, helping to prevent fouling and overheating. Additionally, the 5000 ohm resistance helps minimize electromagnetic interference with vehicle electronics.

Iridium Long Life Product Line

The Denso Iridium Long Life line focuses on delivering extended durability and consistent ignition performance. This product line utilizes iridium and platinum materials in electrode construction to enhance wear resistance and maintain stable spark gaps over time. The 3423 spark plug exemplifies these qualities, making it a suitable replacement part for Isuzu vehicles requiring reliable secondary ignition components.

Applications and Problem Solving

• Replacement for worn or fouled spark plugs in Isuzu Axiom and Rodeo
• Helps resolve misfires caused by electrode wear or gap erosion
• Improves cold start performance and throttle response
• Reduces ignition system electrical noise interference
• Supports consistent combustion for better fuel efficiency

Installation Notes and Tips

• Verify compatibility with Isuzu Axiom or Rodeo before installation
• Use a 16 mm socket wrench for proper tightening
• Ensure the spark plug gap is set to 0.9 mm if adjustment is needed
• Apply anti-seize compound sparingly on threads to prevent galling
• Torque to manufacturer specifications to avoid damage

Quality Assurance and Warranty

Denso spark plugs are manufactured to meet strict quality standards for ignition components. The Iridium Long Life 3423 spark plug undergoes rigorous testing to ensure durability and performance consistency. While specific warranty details may vary, Denso typically offers coverage against manufacturing defects, providing confidence in the product’s reliability for Isuzu Axiom and Rodeo applications.