Autolite 5245 Spark Plug

Reliable Ignition with Autolite Copper Resistor Spark Plug 5245

The Autolite Copper Resistor Spark Plug 5245 delivers consistent ignition performance for a wide range of GM and other vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 4000 ohms for effective electrical noise suppression
• Center electrode made of copper core with nickel tip for optimal conductivity and durability
• Tapered ground electrode tip and seat design for precise spark delivery
• Long projection ceramic insulator for enhanced heat dissipation
• Pre-gap size of 0.044 inches (1.10 mm) for proper spark gap
• Standard stud electrical terminal type with 5/8" (16 mm) hex size for easy installation
• Thread diameter of 14.0 mm and reach of 0.679 inches (17.0 mm) to fit specified applications

About the Copper Resistor Spark Plug Product Line

The Autolite Copper Resistor Spark Plug line is engineered to provide reliable ignition with built-in resistance to reduce radio frequency interference. This product line combines a copper core center electrode with nickel tips and a resistor design to balance conductivity and noise suppression, making it suitable for vehicles requiring stable ignition and minimal electrical interference.

Detailed Product Description

The Autolite 5245 spark plug features a copper core center electrode that enhances thermal conductivity and electrical performance, paired with a nickel tip for wear resistance. The single tapered ground electrode, also nickel-tipped, ensures consistent spark formation. The long projection ceramic insulator improves heat dissipation and prevents fouling. With a resistance rating of 4000 ohms, this spark plug effectively minimizes electrical noise that can interfere with vehicle electronics. Its 14 mm thread diameter and 17 mm reach make it compatible with a variety of GM and other vehicles, including Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, and Saab models.

Compatible Vehicles and Common Applications

• Designed for use in Chevrolet Silverado 1500, 2500, and 3500 series trucks
• Compatible with Cadillac Escalade and Escalade ESV models
• Fits Buick LaCrosse and Regal vehicles
• Suitable for GMC Sierra 1500 and Sierra 2500 HD trucks
• Works with Pontiac Grand Prix and Firebird models

Common Issues Addressed by Autolite 5245 Spark Plug

• Engine misfires due to worn or faulty spark plugs
• Reduced fuel efficiency from incomplete combustion
• Difficulty starting the engine in cold conditions
• Electrical interference affecting vehicle electronics
• Excessive spark plug fouling and wear

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.044 inches (1.10 mm) to ensure optimal performance. Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage to the tapered seat. The 5/8" hex size allows for standard spark plug socket use. Inspect the spark plug threads and cylinder head for cleanliness to ensure proper fitment. This spark plug is designed for vehicles with a 14 mm thread diameter and 17 mm reach; confirm compatibility with your specific make and model.

Quality Assurance and Warranty

Autolite spark plugs are manufactured to meet OEM standards for fit, form, and function. The Copper Resistor Spark Plug 5245 undergoes rigorous quality control to ensure consistent performance and durability. While specific warranty details may vary, Autolite products typically come with a limited warranty against manufacturing defects. Consult your vehicle’s service manual or Autolite documentation for detailed warranty information.