National 100058 Ignition Distributor Seal

Overview of National Ignition Distributor Seal 100058

The National Ignition Distributor Seal 100058 is designed to provide a precise fit and reliable sealing for ignition distributors in select Buick, Chevrolet, and Pontiac vehicles. Engineered with specific inside and outside diameters, this seal ensures optimal performance and protection against contaminants.

• Inside diameter options: 2.156 inches (54.760 mm)
• Outside diameter options: 2.885 inches (73.280 mm)
• Thickness: 0.375 inches (9.530 mm)
• Compatible with ignition distributors on multiple GM models
• Durable construction for long-lasting sealing

Detailed Product Description and Specifications

This ignition distributor seal from National, part number 100058, features dual inside diameter measurements of 2.156 inches (54.760 mm) and outside diameters of 2.885 inches (73.280 mm), with a thickness of 0.375 inches (9.530 mm). These precise dimensions are critical for maintaining a secure seal around the distributor shaft, preventing oil leaks and contamination. The seal is engineered to fit ignition distributors on Buick Caprice, Chevrolet Corvette, Impala, Commercial Chassis, Pontiac Firebird, and Roadmaster models, ensuring compatibility with a range of classic and performance vehicles.

Applications and Common Issues Addressed

• Prevents oil leaks around the ignition distributor shaft
• Protects ignition components from dirt and debris intrusion
• Maintains proper distributor alignment and function
• Helps avoid engine misfires caused by distributor seal failure
• Reduces wear on distributor components by maintaining a clean environment

Installation Notes and Tips

• Ensure the distributor housing and shaft are clean before installation
• Use appropriate tools to avoid damaging the seal during installation
• Verify the seal dimensions match the distributor specifications for Buick Caprice, Chevrolet Corvette, or Pontiac Firebird
• Apply a light coat of oil to the seal lip to ease installation and improve sealing
• Check for proper seating to prevent leaks and ensure distributor performance

Quality Assurance and Warranty Information

National ignition distributor seals are manufactured to meet OEM specifications, providing reliable sealing performance for ignition systems. Part number 100058 undergoes quality control inspections to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National products typically come with a limited warranty against defects in materials and workmanship, supporting long-term durability and customer confidence.