Denso 3377 Spark Plug

Reliable Ignition Performance for Acura, Honda, Jeep, and Ram Vehicles

The Denso Iridium Long Life 3377 spark plug is engineered to deliver consistent ignition and improved durability for select Acura, Dodge, Honda, Jeep, and Ram models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and long-term engine reliability.

• Iridium center electrode tip for enhanced wear resistance
• Platinum chip ground electrode tip for stable spark delivery
• Thick nickel ground electrode core for durability
• Copper center electrode core for optimal conductivity
• Pre-gap size of 1.1 mm for precise ignition timing
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16 mm for standard installation tools
• Manufacturer heat range rating of 20 for balanced thermal performance

Detailed Features and Construction

The Denso 3377 spark plug features an iridium center electrode tip, known for its high melting point and resistance to wear, which helps maintain consistent spark quality over time. The copper core in the center electrode enhances electrical conductivity, improving ignition efficiency. The ground electrode incorporates a platinum chip tip and a thick nickel core, providing durability and stable spark formation. With a pre-gap size of 1.1 mm, this spark plug ensures optimal spark gap for reliable combustion. The flat seat design and 14 mm thread diameter with a 19 mm reach make it compatible with a range of engines, including those in Acura Accord, Honda Civic, Jeep Liberty, and Ram 1500 models.

Iridium Long Life Product Line Overview

The Iridium Long Life line from Denso focuses on delivering extended service intervals and consistent ignition performance. This product line utilizes iridium and platinum materials in electrode tips to reduce wear and maintain spark integrity under demanding conditions. The 3377 spark plug exemplifies these qualities, making it suitable for vehicles requiring durable ignition components that support efficient engine operation.

Applications and Common Issues Addressed

• Replacement for worn or fouled spark plugs in Acura, Honda, Jeep, and Ram vehicles
• Improves engine misfire and rough idle conditions
• Helps restore fuel efficiency by ensuring proper combustion
• Reduces ignition-related starting difficulties
• Supports stable engine performance under varied driving conditions

Installation Notes and Tips

When installing the Denso 3377 spark plug, ensure the pre-gap is set to 1.1 mm if adjustment is necessary. Use a 16 mm socket wrench for proper tightening to avoid damage to the electrode or threads. The flat seat design requires correct seating torque to prevent leaks and ensure optimal performance. Always refer to the vehicle manufacturer’s specifications for torque values and installation procedures.

Quality Assurance and Warranty

Denso spark plugs, including the 3377 model, are manufactured to meet strict quality standards for durability and performance. The use of iridium and platinum materials contributes to extended service life. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliable ignition system operation.