Denso 5008 Spark Plug

Overview of Denso U-Groove Conventional Spark Plug 5008

The Denso U-Groove Conventional Spark Plug 5008 is engineered for reliable ignition performance in select Ford, Lincoln, and Mercury vehicles. Designed with a unique U-groove ground electrode tip, this spark plug supports efficient combustion and consistent engine operation.

• U-groove ground electrode tip design for improved spark exposure
• Nickel ground and center electrode tip materials for durability
• Copper center electrode core for enhanced conductivity
• Standard ground configuration with a single ground electrode
• Pre-gap size of 0.9 mm for optimal spark gap
• Tapered seat type and 11.60 mm reach for precise fitment
• Hex size of 20.6 mm and thread diameter of 18.00 mm
• Manufacturer heat range rating of 16

Detailed Product Description

The Denso 5008 spark plug belongs to the U-Groove Conventional product line, which features a distinctive U-groove ground electrode tip design. This design increases the spark exposure area, promoting better ignition and combustion efficiency. The spark plug’s center electrode core is made of copper, known for its excellent thermal and electrical conductivity, while the nickel tip materials on both the center and ground electrodes provide resistance to wear and corrosion. The single ground electrode with a standard configuration ensures consistent spark delivery. With a pre-gap size of 0.9 mm and a tapered seat, this spark plug is engineered to fit securely and maintain optimal spark gap over time.

Compatible Vehicles and Applications

This spark plug is compatible with a range of Ford, Lincoln, and Mercury models, including but not limited to:

• Ford Bronco, Mustang, F-100, F-150, F-250, F-350, E-100 Econoline series
• Lincoln Continental, Town Car, and Mark series
• Mercury Cougar, Capri, Marquis, and Villager

It is suitable for secondary ignition systems requiring a spark plug with these specific dimensions and heat range.

Common Issues Addressed by Denso 5008 Spark Plug

• Misfiring or inconsistent engine ignition
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting the engine in cold conditions
• Engine hesitation or rough idling
• Excessive electrode wear or corrosion

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Ensure the spark plug gap is set to the recommended 0.9 mm pre-gap size
• Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage
• Inspect the spark plug seat and threads for cleanliness before installation
• Replace spark plugs in sets to maintain balanced engine performance

Quality Assurance and Warranty

Denso manufactures the 5008 spark plug to meet OEM standards for fit, form, and function. The use of copper and nickel materials ensures durability and consistent performance under normal operating conditions. While specific warranty details are not provided, Denso products typically come with manufacturer-backed quality assurance to support reliable ignition system operation.