Dorman Autograde Steel Cup Engine Expansion Plug 9/16 Inch with 0.250 Inch Height for General Motors 1946-1977 555-008

Steel cup engine expansion plug 9/16 inch with 0.250 inch height for General Motors vehicles from 1946 to 1977 used to replace worn or leaking factory plugs.

Built to meet the manufacturer's design intent for reliable service, this plug is constructed from quality steel materials to ensure a secure seal and long-lasting durability in demanding engine environments.

Key Features

• Constructed from durable steel for corrosion resistance
• Precise 9/16 inch diameter with 0.250 inch height
• Designed as a direct replacement for original equipment
• Matches OE form, fit, and function for specified models
• Validated through testing for consistent performance
• Sold in a convenient 10-piece pack for multiple repairs

Benefits

• Restores proper engine sealing to prevent fluid leaks
• Reduces the risk of repeat repairs with robust materials
• Ensures smoother installation with exact OE dimensions
• Provides a cost-effective solution for fleet or shop use
• Helps maintain engine integrity under daily driving demands
• Backed by over a century of automotive expertise

Application

Ideal for mechanics and DIY enthusiasts restoring classic General Motors vehicles or repairing engine blocks that require reliable expansion plugs to stop leaks and maintain pressure.

Fitment Notes

• Compatible with General Motors models from years 1946 to 1963 and 1971 to 1977
• Replaces part numbers including GM 835560, GM 1480819, and Chrysler 3462871

Why Choose Dorman?

• Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function, helping ensure a smoother installation and reliable results while standing up to daily driving demands.

What's in the Box

• 10 pieces of steel cup engine expansion plugs

Item Dimensions

• 3.2 inches x 2.4 inches x 1.5 inches
• Weight: 0.1 lbs