NGK 3346 Spark Plug

Reliable Ignition Performance for Jaguar XJ12 and XJS

The NGK V-Power Spark Plug 3346 is engineered to deliver consistent ignition performance for Jaguar XJ12 and XJS models. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 5000 ohms for optimal electrical performance
• Center electrode core made of copper with a nickel tip for durability
• Single ground electrode with nickel core and standard tip design
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.028 inches for precise spark delivery
• Tapered seat type and 14mm thread diameter for proper fitment
• Manufacturer heat range rating of 7 suitable for Jaguar engines
• Hex size of 5/8 inch and insulator height of 53.00 mm
• Reach length of 0.708 inches ensuring correct installation depth

About the NGK V-Power Spark Plug Line

The V-Power Spark Plug line by NGK focuses on delivering reliable secondary ignition components with materials and designs that meet OEM standards. This line emphasizes consistent electrical resistance and electrode construction to maintain stable ignition and engine performance. The 3346 part number is a part of this line, tailored specifically for Jaguar XJ12 and XJS applications.

Technical Details and Compatibility

The NGK 3346 spark plug features a copper core center electrode with a nickel tip, providing a balance of conductivity and wear resistance. The single ground electrode with a nickel core and standard tip design supports stable spark generation. Its 5000 ohm resistance helps reduce electrical noise and interference. The tapered seat and 14mm thread diameter ensure a secure and proper fit in Jaguar XJ12 and XJS engines. The pre-gap of 0.028 inches is factory set to optimize ignition timing and combustion efficiency.

Common Applications and Problem Solving

• Restores consistent ignition in Jaguar XJ12 and XJS engines
• Helps reduce misfires and rough idling
• Improves cold start performance
• Addresses spark plug fouling and electrode wear
• Supports stable engine power output and fuel efficiency

Installation Notes and Tips

When installing the NGK V-Power Spark Plug 3346, ensure the spark plug gap is checked and adjusted if necessary to 0.028 inches. Use a torque wrench to tighten the plug to the manufacturer’s recommended specifications to avoid damage to the tapered seat. The non-removable nut terminal requires compatible ignition wires or connectors. Inspect the spark plug threads and clean the cylinder head threads before installation to ensure proper fitment and sealing.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The V-Power Spark Plug 3346 undergoes rigorous testing for electrical resistance, electrode integrity, and heat range consistency. While specific warranty details are not provided, NGK products typically come with manufacturer-backed quality assurance to support automotive ignition system reliability.