Denso 3140 Spark Plug

Overview of Denso 3140 Spark Plug for Toyota Supra

The Denso 3140 spark plug is engineered specifically for Toyota Supra models, delivering reliable ignition performance. Designed with a U-groove ground electrode tip, this spark plug supports efficient combustion and consistent engine operation.

• Resistance: 5000 ohms for optimal electrical performance
• Ground Electrode Tip Design: U-groove for improved spark exposure
• Ground Electrode Core Material: Nickel for durability
• Center Electrode Core Material: Copper for enhanced conductivity
• Center Electrode Tip Material: Nickel for wear resistance
• Pre-Gap Size: 0.8 mm for precise spark gap
• Ground Electrode Quantity: Single electrode
• Hex Size: 16.0 mm for standard installation tools
• Manufacturer Heat Range: 20 suitable for Toyota Supra engine requirements
• Seat Type: Flat for secure fitment
• Reach: 19.00 mm ensuring proper combustion chamber positioning
• Thread Diameter: 14.00 mm compatible with factory specifications

About the U-Groove Conventional Product Line

The Denso U-Groove Conventional spark plug line features a unique U-shaped groove on the ground electrode tip. This design increases the spark exposure area, which can improve ignition efficiency and combustion stability. The conventional construction balances performance and durability, making it suitable for applications like the Toyota Supra where consistent ignition is critical.

Technical Details and Performance

The Denso 3140 spark plug incorporates a copper core center electrode to enhance thermal conductivity and electrical performance. The nickel ground and center electrode tips provide resistance to wear and corrosion. With a resistance rating of 5000 ohms, this spark plug helps suppress electrical noise that can interfere with vehicle electronics. The 0.8 mm pre-gap size is factory set to optimize spark timing and combustion efficiency in the Toyota Supra engine.

Applications and Problem Solving

• Restores proper ignition timing and spark delivery in Toyota Supra engines
• Reduces misfires caused by worn or damaged spark plugs
• Improves fuel efficiency by ensuring complete combustion
• Minimizes engine hesitation and rough idling
• Helps maintain stable engine performance under various driving conditions

Installation Notes and Tips

When installing the Denso 3140 spark plug, ensure the spark plug gap is checked and adjusted if necessary to 0.8 mm. Use a 16 mm socket wrench for proper torque application. The flat seat type requires careful tightening to avoid damage to the cylinder head. It is recommended to replace spark plugs in sets to maintain consistent engine performance.

Quality Assurance and Warranty

Denso spark plugs are manufactured to meet OEM specifications and undergo rigorous quality control. The 3140 spark plug is designed for durability and reliable performance in Toyota Supra vehicles. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support long-term use.