NGK 4085 Spark Plug

NGK Iridium IX Spark Plug Overview

The NGK Iridium IX Spark Plug 4085 is engineered for reliable ignition performance in Buick and Oldsmobile vehicles, specifically models like the Cutlass and Skylark. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine responsiveness.

• Iridium center electrode tip for enhanced durability and ignition
• Copper core center electrode for improved conductivity
• Taper cut ground electrode tip with nickel core material
• Standard ground configuration with a single ground electrode
• Removable nut electrical terminal type for easy installation
• Pre-gap size of 0.032 inches optimized for ignition efficiency
• Flat seat type with 0.5 inch reach and 14 mm thread diameter
• Hex size of 13/16 inch for standard tool compatibility
• Manufacturer heat range rating of 6 for balanced thermal performance

Detailed Product Description

The NGK Iridium IX Spark Plug 4085 features a fine iridium tip on the center electrode, which provides a stable and consistent spark while resisting wear over time. The copper core center electrode enhances electrical conductivity, contributing to improved ignition and combustion efficiency. The ground electrode is constructed with a nickel core and shaped with a taper cut design to optimize spark exposure and reduce quenching. This spark plug includes a removable nut electrical terminal, facilitating straightforward installation and maintenance. With a pre-gap size of 0.032 inches and a flat seat design, it ensures proper fit and reliable sealing in the combustion chamber. The heat range of 6 is suitable for maintaining optimal operating temperatures in compatible Buick Cutlass and Oldsmobile Skylark engines.

Compatible Vehicles and Applications

• Compatible with Buick Cutlass models requiring NGK Bpr6hix spark plugs
• Suitable for Oldsmobile Skylark engines designed for part number 4085
• Ideal for secondary ignition system replacement in these specific vehicles
• Addresses ignition issues related to spark plug wear and electrode degradation

Installation Notes and Tips

• Verify the correct spark plug gap of 0.032 inches before installation
• Use a 13/16 inch socket wrench for proper tightening torque
• Ensure the flat seat type matches the engine’s cylinder head design
• Check for proper reach of 0.5 inches to avoid combustion chamber interference
• Inspect the removable nut terminal for secure electrical connection

Quality Assurance and Warranty

NGK maintains strict quality control standards for the Iridium IX Spark Plug line, ensuring consistent performance and durability. This spark plug is manufactured to meet OEM specifications for Buick and Oldsmobile vehicles. While specific warranty details are not provided here, NGK products typically come with manufacturer-backed warranties covering defects in materials and workmanship.

About the NGK Iridium IX Spark Plug Line

The Iridium IX Spark Plug line from NGK is designed to deliver enhanced ignition performance through the use of a fine iridium center electrode tip. This design improves spark efficiency and electrode longevity compared to conventional spark plugs. The combination of iridium and copper core materials supports better conductivity and durability, making the Iridium IX series suitable for vehicles requiring reliable secondary ignition components, such as the Buick Cutlass and Oldsmobile Skylark models compatible with part number 4085.