Denso 3021 Spark Plug

Reliable Ignition Performance for Chrysler and Dodge Vehicles

The Denso 3021 spark plug from the U-Groove Conventional line is engineered to deliver consistent ignition performance for a range of Chrysler, Dodge, Geo, Plymouth, and Suzuki models. Designed with a U-groove ground electrode tip and quality core materials, this spark plug supports efficient combustion and engine reliability.

• U-groove ground electrode tip design for improved spark exposure
• Nickel ground and center electrode tips for durability
• Copper center electrode core for optimal conductivity
• Standard ground configuration with a single ground electrode
• Flat seat type with 19.00 mm reach and 14.00 mm thread diameter
• Pre-gap size of 0.8 mm for precise ignition timing
• Hex size of 20.6 mm for easy installation
• Manufacturer heat range of 16 suitable for various driving conditions

About the Denso U-Groove Conventional Spark Plug Line

The U-Groove Conventional product line by Denso focuses on spark plugs featuring a unique U-groove ground electrode tip design. This design enhances the spark exposure area, which can contribute to more efficient combustion and improved ignition stability. The Denso 3021 spark plug incorporates this technology along with durable nickel and copper core materials to meet the ignition needs of multiple vehicle makes and models.

Technical Details and Compatibility

The Denso 3021 spark plug is compatible with various Chrysler, Dodge, Geo, Plymouth, and Suzuki vehicles, including models such as the Caravan, Grand Caravan, LeBaron, Samurai, Shadow, and Tracker. Its flat seat type and 19.00 mm reach ensure proper fitment and sealing in the combustion chamber. The nickel ground electrode tip and copper center electrode core provide a balance of durability and conductivity, while the 0.8 mm pre-gap size supports reliable ignition performance.

Common Applications and Problem Solving

• Restores consistent ignition in Chrysler Caravan and Dodge Grand Caravan engines
• Addresses misfires and rough idling in Geo Tracker and Suzuki Sidekick
• Improves fuel efficiency and combustion stability in Plymouth Sundance and Dodge Spirit
• Reduces electrode wear in vehicles with standard ignition systems
• Supports reliable starts and smooth acceleration in Chrysler LeBaron and Dodge Daytona

Installation Notes and Tips

When installing the Denso 3021 spark plug, ensure the pre-gap size of 0.8 mm is maintained for optimal ignition. Use a 20.6 mm hex socket for proper torque application. Verify the flat seat type matches the engine specifications to ensure a secure seal. It is recommended to inspect the spark plug threads and clean the combustion chamber before installation to prevent cross-threading and ensure proper fitment.

Quality Assurance and Warranty

Denso spark plugs, including the 3021 model, are manufactured to meet strict quality standards for ignition components. The use of nickel and copper core materials ensures durability and consistent performance. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliable operation in compatible Chrysler, Dodge, Geo, Plymouth, and Suzuki vehicles.