Autolite AP5245 Spark Plug

Autolite Platinum Spark Plug AP5245 Overview

The Autolite Platinum Spark Plug AP5245 is engineered for reliable ignition performance in a range of GM and other vehicles. Designed with durable platinum electrodes and a tapered ground electrode tip, this spark plug supports efficient combustion and consistent engine operation.

• Platinum center electrode and tip for enhanced durability
• Tapered nickel ground electrode tip for precise spark delivery
• Long projection ceramic insulator for improved heat dissipation
• Resistor type with 4000 ohm resistance to reduce electrical noise
• Standard 14mm thread diameter and 0.679 inch reach for proper fitment
• Compatible with multiple GM makes and models including Chevrolet, GMC, Cadillac, and more

Platinum Spark Plug Product Line Details

The Autolite Platinum Spark Plug line focuses on combining platinum electrode technology with reliable construction to provide consistent ignition and longer service life. The AP5245 model features a standard center electrode design with platinum core and tip materials, which help maintain stable spark performance over time. This line is suited for vehicles requiring a balance of durability and efficient combustion.

Technical Specifications and Features

The AP5245 spark plug includes a tapered ground electrode tip made from nickel, which aids in precise spark formation and reduces electrode wear. The ceramic insulator with a long projection design enhances heat resistance and electrical insulation. With a pre-gap size of 0.044 inches (1.10 mm) and a 16mm (5/8 inch) hex size, this plug is designed for straightforward installation and compatibility with specified vehicles. The resistor type with 4000 ohms resistance helps minimize radio frequency interference, ensuring smooth engine electronics operation.

Compatible Vehicles and Applications

• Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab
• Models such as Chevrolet Silverado 1500, GMC Sierra 2500 HD, Cadillac Escalade, Chevrolet Camaro, Pontiac GTO, and more
• Ideal for secondary ignition systems requiring a platinum spark plug with a 14mm thread diameter and 0.679 inch reach

Common Issues Addressed by Autolite AP5245

• Engine misfires due to worn or inefficient spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting the engine in cold or damp conditions
• Increased emissions caused by incomplete combustion
• Electrical interference affecting vehicle electronics

Installation Notes and Tips

Before installation, verify the spark plug gap matches the vehicle manufacturer’s specifications; the AP5245 comes pre-gapped at 0.044 inches (1.10 mm). Use a 5/8 inch (16 mm) socket wrench for removal and installation. Apply anti-seize compound sparingly on the threads if recommended by the vehicle manufacturer. Torque the spark plug to the specified value to avoid damage to the tapered seat and ensure proper sealing.

Quality Assurance and Warranty

Autolite spark plugs are manufactured to meet OEM standards for fit, form, and function. The AP5245 is constructed with high-quality materials including platinum electrodes and ceramic insulators to provide consistent performance. While specific warranty details are not provided here, Autolite products typically come with manufacturer-backed quality assurance to support reliable operation in compatible vehicles.