NGK 5858 Spark Plug

Reliable Ignition with NGK V-Power Spark Plug 5858

The NGK V-Power Spark Plug 5858 is engineered to deliver consistent ignition performance for a range of classic and modern vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and reliable engine operation.

• Resistance rating of 5000 ohms for optimal electrical performance
• Standard ground electrode tip and configuration for dependable spark delivery
• Nickel ground electrode core and nickel center electrode tip for durability
• Copper center electrode core material to enhance conductivity
• Pre-gap size of 0.040 inches for precise spark gap
• Flat seat type with 14.00 mm thread diameter and 0.375 inch reach
• Non-removable nut electrical terminal type for secure connection
• Hex size of 13/16 inch for easy installation
• Manufacturer heat range of 4 suitable for a variety of engine conditions

About the NGK V-Power Spark Plug Line

The V-Power Spark Plug line by NGK is designed to provide reliable ignition components that meet OEM specifications. This product line focuses on delivering consistent spark performance through quality materials such as copper cores and nickel tips, ensuring durability and efficient combustion. The 5858 part number within this line is tailored for vehicles requiring a heat range 4 spark plug with standard electrode design and flat seat configuration.

Detailed Product Description

The NGK V-Power Spark Plug 5858 features a copper core center electrode that enhances electrical conductivity, paired with a nickel tip and ground electrode core for long-lasting wear resistance. The single ground electrode with a standard tip design ensures stable spark generation, while the 5000 ohm resistance helps suppress electrical noise. Its flat seat and 14 mm thread diameter make it compatible with a variety of ignition systems. The pre-gap of 0.040 inches is factory set to optimize ignition timing and combustion efficiency. This spark plug is compatible with several GM and Chrysler makes, including Buick, Cadillac, Chevrolet, Chrysler, Dodge, Jeep, Oldsmobile, and Pontiac models such as the Camaro, Impala, Charger, Firebird, and more.

Compatible Vehicles and Applications

• Buick models including Century, LeSabre, and Skylark
• Cadillac DeVille, Eldorado, and Fleetwood
• Chevrolet Camaro, Caprice, Impala, and Nova
• Chrysler Town & Country and Imperial
• Dodge Challenger, Charger, and Dakota
• Jeep CJ5 and Grand Cherokee
• Oldsmobile Cutlass, Delta 88, and 98
• Pontiac GTO, Firebird, and Grand Prix

Common Issues Addressed by NGK 5858 Spark Plug

• Engine misfires due to worn or faulty spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting engines in compatible Buick, Chevrolet, and Dodge models
• Rough idling or hesitation during acceleration
• Electrical interference affecting ignition system performance

Installation Notes and Tips

Ensure the spark plug gap is checked before installation, although the NGK 5858 comes pre-gapped at 0.040 inches. Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage to the flat seat. The 13/16 inch hex size allows for standard spark plug socket use. Confirm compatibility with your vehicle’s make and model, especially for classic cars like the Pontiac Firebird or Buick LeSabre. Avoid over-tightening to prevent thread damage.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The V-Power Spark Plug 5858 undergoes rigorous testing for heat range, resistance, and electrode integrity. While specific warranty details may vary, NGK products typically come with manufacturer-backed quality assurance to support long-term use in compatible vehicles.