Dorman Autograde Engine Expansion Plug 2 Inch Steel Cup for Chevrolet GMC 550-028

Concave steel cup engine expansion plug for 1952 to 1962 Chevrolet and GMC vehicles used to replace worn or leaking original freeze plugs.

Built to meet the manufacturer's design intent for reliable service. This component is engineered 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
• Concave cup design matches original equipment specifications
• Measures 2 inches in diameter with a 2.000 inch height
• Direct replacement for specific legacy Chevrolet and GMC models
• Validated by product experts with over a century of automotive experience

Benefits

• Restores proper sealing to prevent coolant leaks and engine overheating
• Eliminates the risk of repeat repairs caused by inferior materials
• Ensures a precise fit for smoother installation without modification
• Extends engine life by maintaining correct cooling system pressure
• Provides trustworthy quality backed by extensive industry testing

Application

Ideal for classic car restorations and maintenance on vintage Chevrolet and GMC trucks or cars requiring block plug replacement to fix cooling system issues.

Fitment Notes

• Compatible with select Chevrolet models from 1952 to 1962
• Compatible with select GMC models from 1954 to 1962
• Replaces General Motors part number 3835121 and Navistar 63556R1

Why Choose Dorman - Autograde?

• Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function
• Built with quality materials and validated through testing to stand up to daily driving demands
• Offers a smart way to restore your vehicle with confidence in fit and durability

What's in the Box

• 10 Piece Set of Engine Expansion Plugs

Item Dimensions

• Length: 3.2 inches
• Width: 2.4 inches
• Height: 1.5 inches
• Weight: 0.8 lbs