Denso 3416 Spark Plug

Reliable Ignition Performance for Geo, Lexus, and Toyota Vehicles

The Denso 3416 Spark Plug - Iridium Long Life is engineered to provide consistent ignition and enhanced durability for select Geo, Lexus, and Toyota models. Designed with advanced materials, this spark plug supports efficient combustion and long-term engine reliability.

• Iridium center electrode tip for improved wear resistance
• Platinum chip ground electrode tip for stable spark delivery
• Copper core center electrode for optimal conductivity
• Nickel ground electrode core material with standard ground configuration
• Pre-gap size of 0.8 mm for precise spark gap
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16 mm for standard installation tools
• Manufacturer heat range rating of 20
• Resistance value of 5000 ohms to reduce electrical noise

About the Denso Spark Plug - Iridium Long Life Product Line

The Spark Plug - Iridium Long Life line from Denso focuses on delivering extended service intervals and consistent ignition performance. Utilizing iridium and platinum materials, these spark plugs are designed to withstand high temperatures and resist electrode wear, making them suitable for vehicles requiring reliable secondary ignition components. The 3416 part number is a precise fit for various Geo, Lexus, and Toyota models, ensuring compatibility and performance.

Technical Details and Features

This spark plug features a copper core center electrode with an iridium tip, which enhances electrical conductivity and durability. The ground electrode includes a platinum chip tip and a nickel core, arranged in a standard single-electrode configuration. The pre-gap size of 0.8 mm is factory set to optimize spark efficiency. With a flat seat and a thread diameter of 14 mm, the Denso 3416 spark plug fits securely in the combustion chamber. The heat range of 20 is calibrated to maintain proper operating temperature, preventing fouling and overheating.

Applications and Problem Solving

• Compatible with Geo Celica, Lexus LS400, Toyota Corolla, MR2, and Prizm models
• Helps reduce misfires and rough idling caused by worn spark plugs
• Improves fuel efficiency by ensuring consistent ignition
• Addresses ignition noise issues with 5000 ohm resistance
• Supports long-term engine performance by resisting electrode wear

Installation Notes and Tips

When installing the Denso 3416 spark plug, ensure the pre-gap is maintained at 0.8 mm if adjustment is necessary. Use a 16 mm socket wrench for proper torque application. The flat seat design requires careful seating to avoid combustion chamber leaks. Always verify compatibility with your specific Geo, Lexus, or Toyota model before installation.

Quality Assurance and Warranty

Denso manufactures the 3416 spark plug to meet strict quality standards for ignition components. The use of iridium and platinum materials contributes to extended service life and consistent performance. While specific warranty details are not provided, Denso products typically adhere to manufacturer quality controls to ensure reliability in secondary ignition applications.