Autolite AP45 Spark Plug

Reliable Ignition Performance for Ford, Lincoln, and Mercury Vehicles

The Autolite Platinum Spark Plug AP45 is engineered to deliver consistent ignition and efficient combustion for a range of Ford, Lincoln, and Mercury models. Designed with durable materials and precise specifications, this spark plug supports optimal engine performance and longevity.

• Platinum center electrode tip and core for enhanced durability
• Tapered ground electrode tip with nickel core for reliable spark delivery
• Resistor type with 4000 ohm resistance to reduce electrical noise
• Ceramic mid-projection insulator for improved heat dissipation
• Standard 13/16" (21 mm) hex size and tapered seat for secure installation
• Pre-gap size of 0.044 inches (1.10 mm) optimized for ignition efficiency
• Thread diameter of 18.0 mm and reach of 0.433 inches (11.0 mm) for proper fitment
• Compatible with stud-type electrical terminals

About the Autolite Platinum Spark Plug Line

The Platinum Spark Plug line from Autolite focuses on combining platinum materials in both the center electrode core and tip to provide extended service life and stable performance. This line is designed to meet the ignition demands of various vehicles, including many Ford, Lincoln, and Mercury models, by offering improved wear resistance and consistent spark quality compared to conventional spark plugs.

Detailed Product Description

The AP45 spark plug features a platinum center electrode tip and core, which enhances durability and maintains a stable spark over time. The tapered ground electrode tip made from nickel ensures reliable spark exposure and ignition. With a resistor type design and 4000 ohm resistance, this spark plug minimizes electrical interference with vehicle electronics. The ceramic mid-projection insulator supports effective heat management, reducing the risk of fouling and pre-ignition. Its tapered seat and standard hex size allow for secure and straightforward installation in compatible engines.

Common Applications and Issues Addressed

• Replacement for worn or fouled spark plugs in Ford Mustang, F-150, and Lincoln Continental
• Improves engine misfire and rough idle conditions
• Helps restore fuel efficiency and smooth acceleration
• Reduces ignition system electrical noise affecting onboard electronics
• Supports reliable starting and consistent combustion in Mercury Cougar and Ford Bronco

Installation Notes and Tips

• Ensure the spark plug gap is set to 0.044 inches (1.10 mm) before installation
• Use a torque wrench to tighten to manufacturer specifications to avoid damage
• Check for proper reach (0.433 inches / 11.0 mm) to ensure correct fitment in the combustion chamber
• Inspect the spark plug threads and clean the cylinder head threads if necessary
• Compatible with stud-type electrical terminals; verify connector fit before installation

Quality Assurance and Warranty

Autolite Platinum Spark Plug AP45 is manufactured to meet OEM standards for ignition components. The use of platinum materials and ceramic insulators ensures durability and consistent performance. While specific warranty details are not provided, Autolite products typically adhere to industry quality controls and are designed for reliable service life in compatible Ford, Lincoln, and Mercury vehicles.