Denso 3174 Spark Plug

Overview of Denso Double Platinum Spark Plug 3174

The Denso Double Platinum Spark Plug 3174 is engineered for reliable ignition performance in a variety of vehicles including Buick, Chevrolet, Honda, and Nissan models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Double platinum chip ground electrode tip for enhanced durability
• Copper core center electrode with platinum tip for improved conductivity
• Standard ground configuration with nickel ground electrode core
• Pre-gap size of 1.1 mm for optimal spark gap
• Flat seat type with 19.00 mm reach and 14.00 mm thread diameter
• Hex size of 16.0 mm for easy installation
• Manufacturer heat range rating of 16
• Resistance of 5000 ohms to reduce electrical noise

Features of the Double Platinum Product Line

The Double Platinum line from Denso focuses on durability and consistent spark performance by utilizing platinum on both the center and ground electrodes. This design reduces electrode wear and extends service life compared to conventional spark plugs. The 3174 part number benefits from this technology, making it suitable for vehicles requiring long-lasting ignition components.

Technical Description and Specifications

The Denso 3174 spark plug features a copper core center electrode with a platinum tip, which enhances electrical conductivity and heat dissipation. The ground electrode incorporates a double platinum chip tip and a nickel core, providing resistance to wear and maintaining a stable spark gap. With a pre-gap size of 1.1 mm and a flat seat design, this spark plug ensures proper sealing and ignition efficiency. The 16.0 mm hex size allows for straightforward installation using standard tools. Its heat range of 16 is calibrated to suit a wide range of engine operating conditions.

Compatible Vehicles and Applications

This spark plug is compatible with multiple makes and models, including but not limited to:

• Buick LeSabre, Skylark, and Century
• Chevrolet Camaro, Corvette, and Sunfire
• Honda Accord and Civic
• Nissan 240SX and Sentra
• Mazda MX-3 and 323

It is designed for secondary ignition systems requiring a reliable spark plug with platinum electrodes.

Common Issues Addressed by Denso 3174 Spark Plug

• Engine misfires due to electrode wear
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting the engine in cold conditions
• Increased emissions caused by incomplete combustion
• Ignition noise interference affecting electronic systems

Installation Notes and Tips

• Ensure the spark plug gap is set to 1.1 mm before installation
• Use a 16 mm socket wrench for proper torque application
• Apply anti-seize compound on threads if recommended by the vehicle manufacturer
• Verify flat seat compatibility with the engine cylinder head
• Follow vehicle-specific torque specifications to avoid damage

Quality Assurance and Warranty

Denso manufactures the Double Platinum 3174 spark plug to meet strict quality standards, ensuring consistent performance and durability. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship. Refer to the vehicle or part documentation for exact warranty terms.