Dorman Autograde Concave Steel Cup Expansion Plug 3/4 In with 0.750 In Height for International 1966-1980 550-007

Concave steel cup expansion plug 3/4 inch with 0.750 inch height for International trucks 1966 to 1980 used to replace worn or leaking factory engine plugs.

Built to meet the manufacturer's design intent for reliable service. This engine expansion plug is constructed from quality steel materials and engineered to match the original part's fit and function for dependable performance.

Key Features

• Constructed from durable concave steel for long-lasting use
• Measures 3/4 inch in diameter with a 0.750 inch height
• Designed as a direct-fit replacement for specified vehicles
• Matches original equipment form fit and function
• Validated through testing to ensure reliability
• Compatible with Navistar and Pioneer part numbers

Benefits

• Restores engine integrity by sealing coolant leaks effectively
• Reduces the risk of repeat repairs with quality materials
• Ensures a smoother installation with precise OE matching
• Helps maintain proper engine operating temperatures
• Provides a trustworthy fix backed by over a century of experience
• Prevents potential engine damage from fluid loss

Application

Ideal for mechanics and vehicle owners repairing International trucks from model years 1966 through 1980. Commonly used during engine rebuilds or when addressing coolant leaks caused by corroded or failed factory expansion plugs.

Fitment Notes

• Fits International vehicles from years 1966 to 1980
• Replaces Navistar part numbers 109544R1 and 172531
• Direct replacement for Pioneer part number EP-3

Why Choose Dorman - Autograde?

• Dorman parts are engineered as direct-fit replacements designed to match OE form fit and function helping ensure a smoother installation and reliable results

What's in the Box

• 10 PC

Item Dimensions

• 3.2in x 2.4in x 1.5in 0.2lbs