Denso 5071 Spark Plug

Reliable Ignition Performance for Select GM Vehicles

The Denso Double Platinum 5071 spark plug is engineered to deliver consistent ignition performance for a range of GM trucks and cars. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability in vehicles like the Chevrolet Silverado 2500 HD and GMC Sierra 3500.

• Double platinum electrodes for enhanced durability and stable spark
• Platinum chip ground electrode tip for improved ignition consistency
• Copper core center electrode for optimal conductivity
• Standard ground configuration with nickel ground electrode core
• Pre-gap size of 1.5 mm for precise spark gap
• 16 mm hex size and 18 mm reach for proper fitment
• Tapered seat type ensuring secure installation
• Manufacturer heat range rating of 14 for balanced thermal performance

Technical Details of the Denso Double Platinum 5071 Spark Plug

The Denso Double Platinum 5071 spark plug features a copper core center electrode with a platinum tip, which enhances electrical conductivity and wear resistance. The ground electrode incorporates a platinum chip tip and a nickel core, providing durability and consistent spark delivery. With a resistance rating of 5000 ohms, this spark plug helps reduce electrical noise and interference. The standard ground configuration and single ground electrode design maintain reliable ignition while the 1.5 mm pre-gap size ensures optimal spark gap for efficient combustion. The 16 mm hex size and 18 mm reach are designed to fit specific GM models, including Buick Century and Pontiac Sunfire, ensuring proper installation and performance.

Compatible Vehicles and Applications

This spark plug is compatible with a variety of GM vehicles, including:

• Buick Century and Regal
• Chevrolet Avalanche 2500 and Silverado 3500
• GMC Sierra 2500 HD and Yukon XL 2500
• Oldsmobile Cutlass Ciera
• Pontiac Sunfire and Grand Am

It is suitable for use in secondary ignition systems where reliable spark and durability are required.

Common Issues Addressed by Denso 5071 Spark Plug

• Misfires and rough idling due to worn or fouled spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting the engine in cold conditions
• Engine hesitation or loss of power under load
• Electrical interference affecting onboard electronics

Installation Notes and Tips

• Ensure the spark plug gap is set to 1.5 mm before installation if not pre-gapped
• Use a torque wrench to tighten to manufacturer specifications to avoid damage
• Check thread diameter (14 mm) and reach (18 mm) compatibility with your engine
• Inspect the tapered seat for proper sealing during installation
• Replace spark plugs in sets to maintain balanced engine performance

Quality Assurance and Warranty

Denso's Double Platinum spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. The 5071 spark plug undergoes rigorous testing for heat range, electrical resistance, and material integrity. While specific warranty details may vary, Denso products typically come with a limited warranty against manufacturing defects. Consult your vehicle’s service manual and Denso’s warranty policy for detailed coverage information.