NGK 1698 Spark Plug

Reliable Ignition Performance for Ford, Lincoln, and Mercury Vehicles

The NGK G-Power Spark Plug part number 1698 is engineered to deliver consistent ignition performance for select Ford, Lincoln, and Mercury models. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 5000 ohms for optimal electrical performance
• Ground Electrode Tip Design: Trapezoid for improved spark exposure
• Center Electrode Tip Material: Platinum for enhanced durability
• Center Electrode Core Material: Copper to ensure excellent conductivity
• Ground Electrode Core Material: Nickel for corrosion resistance
• Pre-Gap Size: 0.040 inches for precise spark gap
• Hex Size: 14 mm for standard installation tools
• Thread Diameter: 12.00 mm with a 26.5 mm reach
• Seat Type: Tapered for secure fitment
• Electrical Terminal Type: Non-removable nut for stable connection

About the NGK G-Power Spark Plug Line

The G-Power Spark Plug line from NGK is designed to provide reliable ignition with a focus on durability and consistent performance. Featuring a platinum-tipped center electrode, these plugs offer extended service life and stable spark delivery. The trapezoid ground electrode tip design enhances spark exposure, contributing to efficient combustion in compatible engines.

Technical Details and Compatibility

This NGK spark plug (part number 1698) is compatible with a range of Ford, Lincoln, and Mercury vehicles including the Expedition, Explorer, Explorer Sport Trac, F-150, F-250 Super Duty, F-350 Super Duty, Mark LT, Mountaineer, Mustang, and Navigator. The plug’s tapered seat and 26.5 mm reach ensure proper fitment and sealing in these engines. The manufacturer heat range of 6 balances heat dissipation and performance for these applications.

Common Applications and Problem Solving

• Restores consistent ignition in Ford F-150 and Lincoln Navigator engines
• Helps reduce misfires and rough idling in Mercury Mountaineer and Ford Explorer
• Improves fuel efficiency by maintaining optimal spark gap and electrode condition
• Addresses corrosion and electrode wear issues with platinum and nickel materials
• Supports reliable starting and acceleration in heavy-duty trucks like F-250 and F-350 Super Duty

Installation Notes and Tips

When installing the NGK G-Power Spark Plug 1698, ensure the engine is cool to prevent damage to the threads. Use a torque wrench to tighten the plug to manufacturer specifications, avoiding over-tightening which can damage the tapered seat. The 14 mm hex size fits standard spark plug sockets, and the non-removable nut terminal provides a secure electrical connection. Verify the pre-gap of 0.040 inches before installation to maintain optimal spark performance.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable ignition performance and durability. The G-Power Spark Plug line undergoes rigorous testing for resistance, electrode integrity, and heat range accuracy. While specific warranty details may vary, NGK products typically come with a limited warranty against manufacturing defects, providing confidence in product reliability.