Autolite APP5245 Spark Plug

Reliable Ignition with Autolite Double Platinum Spark Plug APP5245

The Autolite Double Platinum Spark Plug APP5245 is engineered to provide consistent ignition performance for a wide range of vehicles including Buick, Chevrolet, GMC, and Cadillac models. Designed with durable platinum electrodes and a tapered ground electrode tip, this spark plug supports efficient combustion and long service life.

• Double platinum center and ground electrode tips for enhanced durability
• Tapered ground electrode design with nickel core for reliable spark delivery
• Standard center electrode design with platinum core and tip
• Long projection ceramic insulator for improved heat dissipation
• Resistor type with 4000 ohm resistance to reduce electrical noise
• Pre-gapped at 0.044 inches (1.10 mm) for optimal ignition
• 16 mm (5/8 inch) hex size with tapered seat and 17 mm reach
• Stud type electrical terminal for secure connection

The Autolite Double Platinum Spark Plug line is designed to offer a balance of performance and longevity by utilizing platinum on both the center and ground electrodes. This construction reduces electrode wear and maintains a stable spark gap over time, which is critical for maintaining engine efficiency and reducing misfires. The APP5245 model features a tapered ground electrode tip made from nickel with a platinum coating, enhancing ignition reliability in secondary ignition systems.

Technical Details and Vehicle Compatibility

This spark plug is compatible with a variety of GM and related makes, including Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, and Saab. It fits models such as the Chevrolet Silverado 1500, GMC Sierra 2500 HD, Cadillac Escalade, Buick LaCrosse, and Pontiac GTO, among others. The part number APP5245 ensures precise fitment for vehicles requiring a 14 mm thread diameter, 17 mm reach, and a 5/8 inch hex size.

Common Applications and Problem Solving

• Resolves engine misfires caused by worn or damaged spark plugs
• Improves cold start performance in vehicles like the Chevrolet Camaro and GMC Yukon
• Reduces ignition system electrical noise with built-in resistor
• Maintains consistent spark gap to prevent rough idling in Cadillac CTS and Buick Allure
• Supports fuel efficiency and smooth acceleration in trucks such as the Chevrolet Avalanche and GMC Sierra

Installation Notes and Tips

• Verify correct gap of 0.044 inches (1.10 mm) before installation
• Use a 5/8 inch (16 mm) spark plug socket for proper torque application
• Ensure tapered seat matches cylinder head specifications for proper sealing
• Apply anti-seize compound sparingly on threads if recommended by vehicle manufacturer
• Torque to manufacturer specifications to avoid damage to spark plug or cylinder head

Quality Assurance and Warranty

Autolite spark plugs are manufactured to meet or exceed OEM standards for ignition components. The Double Platinum Spark Plug APP5245 features a ceramic insulator designed for high thermal resistance and durability. While specific warranty details vary by retailer, Autolite products typically come with a limited warranty covering defects in materials and workmanship.