NGK 90198 Spark Plug

Reliable Ignition Performance for Select GM and Ford Vehicles

The NGK G-Power Spark Plug 90198 is engineered to deliver consistent ignition performance for a range of vehicles including Buick, Cadillac, Chevrolet, Ford, and GMC models. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance rating of 5000 ohms for optimal electrical performance
• Trapezoid ground electrode tip design for stable spark delivery
• Nickel ground electrode core material ensuring durability
• Copper center electrode core with platinum tip for enhanced conductivity and wear resistance
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.040 inches for proper spark gap
• Standard ground configuration with a single ground electrode
• Tapered seat type and 5/8 inch hex size for easy installation
• Manufacturer heat range of 6 suitable for moderate engine temperatures
• Thread diameter of 14 mm and reach of 25 mm for correct fitment

About the NGK G-Power Spark Plug Line

The G-Power Spark Plug line from NGK is designed to provide reliable ignition with enhanced electrode materials. Featuring a copper core center electrode with a platinum tip, these plugs offer improved conductivity and longer service life compared to standard spark plugs. The trapezoid ground electrode tip design helps maintain a stable spark, contributing to consistent engine performance across compatible vehicles.

Technical Details and Compatibility

This NGK spark plug, part number 90198 (Ltr6gp), features a single nickel ground electrode with a trapezoid tip and a copper core center electrode tipped with platinum. The plug’s resistance is rated at 5000 ohms, which helps reduce electrical interference while maintaining spark quality. With a pre-gap of 0.040 inches and a tapered seat, it is designed for precise fitment and optimal combustion.

Compatible with a variety of makes and models including Buick LaCrosse, Cadillac CTS, Chevrolet Camaro, Ford F-150, GMC Canyon, Mazda CX-9, Pontiac G6, Saab 9-4X, Saturn Vue, and Suzuki Grand Vitara, this spark plug supports a wide range of secondary ignition needs.

Common Applications and Problem Solving

• Restores proper ignition in engines experiencing misfires
• Improves fuel efficiency by ensuring consistent spark delivery
• Reduces engine hesitation and rough idling
• Helps maintain stable combustion in moderate heat range engines
• Prevents electrical interference with a 5000 ohm resistance rating

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.040 inches if adjustment is necessary. Use a 5/8 inch socket for removal and installation, and ensure the tapered seat is clean and free of debris. Torque the spark plug to manufacturer specifications to avoid damage to the threads or seat. The non-removable nut terminal type requires compatible ignition wire connectors for secure attachment.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The G-Power Spark Plug 90198 is built with premium materials including a platinum-tipped center electrode and nickel ground electrode core. While specific warranty details may vary, NGK products typically come with manufacturer-backed quality assurance to support long-term use in compatible vehicles.