Dorman 42025 Spark Plug Thread Repair Kit

Reliable Spark Plug Thread Repair for Ford and Lincoln Vehicles

The Dorman 42025 Spark Plug Thread Repair Kit offers a durable solution for restoring damaged spark plug threads in cylinder heads. Designed specifically for select Ford and Lincoln models, this kit ensures a precise fit and long-lasting repair.

• Includes one flanged steel insert with a coated finish for corrosion resistance
• Medium insert reach with 5/8-18 nominal thread size, compatible with spark plug threads
• Clockwise thread direction matching factory specifications
• Designed for inch thread measurements
• Package contains one cylinder head repair kit insert

Durable Steel Insert with Coated Finish

The Dorman 42025 features a flanged steel insert engineered to restore spark plug threads effectively. The coated finish enhances corrosion resistance, extending the life of the repair. With a medium reach and standard 5/8-18 thread size, this insert is tailored for spark plug applications in various Ford and Lincoln vehicles. The clockwise thread direction aligns with factory thread patterns, ensuring proper installation and reliable performance.

Compatible Ford and Lincoln Models

This spark plug thread repair kit is compatible with a range of Ford and Lincoln vehicles, including the Ford F-150, F-250 Super Duty, F-350 Super Duty, Mustang, Expedition, Excursion, E-150 Econoline series, and Lincoln Navigator and Blackwood models. The Dorman 42025 is designed to meet the specific thread repair needs of these vehicles, providing a precise and secure fit.

Common Applications and Repair Uses

• Restoring stripped or damaged spark plug threads in cylinder heads
• Repairing threads damaged by cross-threading or over-tightening
• Fixing spark plug hole wear caused by corrosion or repeated spark plug changes
• Preventing spark plug blowouts due to compromised threads
• Maintaining engine performance by ensuring proper spark plug seating

Installation Notes and Tips

• Ensure the cylinder head is clean and free of debris before installation
• Use appropriate tools to avoid damaging the insert or threads
• Follow torque specifications for spark plug installation after repair
• Verify clockwise thread direction during installation to match factory standards
• Consult vehicle service manual for detailed repair procedures

Quality Assurance and Warranty

Dorman manufactures the 42025 Spark Plug Thread Repair Kit to meet industry standards for durability and fitment. The steel insert with coated finish provides corrosion resistance and long-term reliability. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in materials and workmanship.