Dorman Autograde Steel Cup Engine Expansion Plug 1.5 Inch with 0.480 Inch Height for 1991-1946 Vehicles 555-028

Steel cup engine expansion plug 1.5 inch with 0.480 inch height used to replace worn or leaking freeze plugs in 1991 to 1946 vehicles.

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 against engine coolant exposure.

Key Features

• Constructed from durable steel for corrosion resistance
• Dimensions: 1.5 inch diameter with 0.480 inch height
• Designed to match original equipment form and function
• Validated by product experts with over a century of automotive experience
• Sold as a 10-piece pack for multiple replacements

Benefits

• Prevents coolant leaks caused by cracked or corroded factory plugs
• Ensures a precise fit to reduce installation time and effort
• Restores engine cooling system integrity for safe operation
• Reduces the risk of repeat repairs with robust material quality
• Provides cost-effective solution for fleet or shop inventory

Application

Ideal for mechanics and DIY enthusiasts repairing engine blocks on vintage to modern vehicles requiring a 1.5 inch steel cup expansion plug to stop leaks and maintain proper cooling system pressure.

Fitment Notes

• Compatible with select 1991 to 1946 vehicle models requiring this specific size
• Replaces various OEM part numbers including GM 555679, Ford 370352S, and Chrysler J1351516
• Verify engine block hole size before installation to ensure proper fit

Why Choose Dorman?

• 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
• Backed by a strong focus on fit, durability, and dependable performance

What's in the Box

• 10 Piece Steel Cup Expansion Plug Set

Item Dimensions

• 3.7 inches x 2.4 inches x 2.2 inches
• Weight: 0.6 lbs