Denso 5338 Spark Plug

Overview of Denso Iridium Power Spark Plug 5338

The Denso Iridium Power spark plug 5338 is engineered for reliable ignition performance in a variety of vehicles including Buick, Chevrolet, Ford, and Mazda models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability
• Tapercut, u-groove ground electrode tip design
• Copper core center electrode for improved conductivity
• Nickel ground electrode core material with standard ground configuration
• Pre-gap size of 1.1 mm for optimal spark delivery
• Tapered seat type with 14 mm thread diameter and 25 mm reach
• Hex size of 16.0 mm for standard installation tools
• Manufacturer heat range of 16 suitable for various engine conditions

Detailed Features and Specifications

The Denso Iridium Power 5338 spark plug features a fine iridium tip on the center electrode, which provides a stable and efficient spark while maintaining long service life. The copper core center electrode enhances thermal conductivity, helping to dissipate heat effectively. The ground electrode uses a nickel core with a tapercut and u-groove tip design, which improves ignitability and reduces quenching effects. With a pre-gap size of 1.1 mm, this spark plug ensures consistent ignition timing and combustion efficiency. The tapered seat and 14 mm thread diameter make it compatible with a wide range of engines, while the 25 mm reach fits many Buick, Cadillac, Chevrolet, Ford, and Mazda models. The heat range 16 rating is designed to handle various operating temperatures, balancing performance and durability.

Iridium Power Brand Line Information

The Iridium Power line by Denso focuses on delivering spark plugs with iridium-tipped electrodes that offer improved ignition performance and longer service intervals compared to conventional plugs. This product line is designed to meet the demands of modern engines by providing precise spark control and enhanced durability, making it suitable for vehicles such as the Chevrolet Malibu, Ford Fusion, and Mazda CX-7.

Compatible Vehicles and Applications

• Buick LaCrosse, Regal, and Enclave
• Chevrolet Malibu, Equinox, and Trailblazer
• Ford Fusion, Escape, and Transit Connect
• Mazda CX-7 and Tribute
• Cadillac CTS and SRX

This spark plug is ideal for secondary ignition systems in these vehicles, helping to maintain smooth engine operation and fuel efficiency.

Common Issues Addressed by Denso Iridium Power 5338

• Misfires and rough idling due to worn or fouled spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting the engine in cold or damp conditions
• Engine hesitation or loss of power under load
• Increased emissions caused by incomplete combustion

Installation Notes and Tips

When installing the Denso Iridium Power 5338 spark plug, ensure the engine is cool to prevent damage to the threads. Use a torque wrench to tighten the plug to the manufacturer’s recommended specifications to avoid over-tightening or under-tightening. Verify the pre-gap size of 1.1 mm before installation, adjusting if necessary. The 16 mm hex size allows for standard spark plug sockets, and the tapered seat ensures a proper seal in the combustion chamber.

Quality Assurance and Warranty

Denso manufactures the Iridium Power spark plugs to meet strict quality standards, ensuring consistent performance and durability. While specific warranty details may vary, Denso products typically come with a limited warranty against manufacturing defects. Using genuine Denso spark plugs like the 5338 helps maintain engine reliability and supports manufacturer recommendations for ignition components.