Denso 3256 Spark Plug

Reliable Ignition Performance with Denso 3256 Spark Plug

The Denso 3256 spark plug from the U-Groove Conventional line offers consistent ignition performance for a variety of vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine operation.

• U-groove ground electrode tip design for improved spark exposure
• Nickel ground electrode core and tip for durability
• Copper center electrode core with nickel tip for optimal conductivity
• Standard ground configuration with a single ground electrode
• 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 20.6 mm for easy installation
• Manufacturer heat range of 16 suitable for various engine conditions
• Resistance of 5000 ohms to reduce electrical noise interference

About the Denso U-Groove Conventional Spark Plug Line

The U-Groove Conventional spark plug line by Denso features a unique U-shaped groove on the ground electrode tip. This design increases the spark exposure area, which can enhance ignition efficiency and combustion stability. The conventional construction balances performance and durability, making it suitable for many standard ignition systems.

Technical Details and Application

The Denso 3256 spark plug is engineered with a copper core center electrode for excellent thermal conductivity, paired with nickel tips on both the center and ground electrodes to resist wear. The single ground electrode with a U-groove tip design improves spark reach and flame kernel development. With a flat seat and 19 mm reach, this spark plug fits applications requiring these specific dimensions. The 5000 ohm resistance helps minimize radio frequency interference, supporting vehicle electronics.

Common Uses and Problem Solving

• Restores proper ignition in engines experiencing misfires
• Improves combustion efficiency in vehicles with standard ignition systems
• Reduces electrical noise affecting onboard electronics
• Addresses spark plug fouling due to consistent gap and electrode design
• Supports stable engine performance in compatible makes and models

Installation Notes and Tips

Ensure the spark plug gap is set to the specified 0.8 mm pre-gap before installation. Use a 20.6 mm socket for proper tightening torque. Verify compatibility with your vehicle’s thread diameter of 14 mm and reach of 19 mm to avoid engine damage. Follow manufacturer torque specifications to prevent over-tightening or under-tightening.

Quality Assurance and Warranty

Denso spark plugs, including the 3256 part number, are manufactured to meet strict quality standards for ignition components. The materials and design undergo rigorous testing to ensure durability and consistent performance. Warranty coverage details should be confirmed with the vehicle manufacturer or parts distributor.