Dorman Autograde Steel Cup Engine Expansion Plug 3/8 In for Dodge Ford Mercury 555-115

Steel cup engine expansion plug 3/8 inch for 1961-2005 Ford, 1961-1983 Mercury, and 1989-2005 Dodge vehicles used to replace leaking or corroded factory freeze plugs.

Built to meet the manufacturer's design intent for reliable service. This component is constructed from durable steel to withstand engine heat and coolant exposure, ensuring a secure seal within the engine block.

Key Features

• Constructed from high-quality steel for long-lasting durability
• Dimensions: 3/8 inch diameter with 0.150 inch height
• Engineered to match original equipment form, fit, and function
• Validated through testing to meet strict performance standards
• Direct replacement for specific Ford, Mercury, and Dodge models
• Part number 555-115 ensures correct identification

Benefits

• Stops coolant leaks caused by worn or damaged expansion plugs
• Prevents engine overheating by maintaining proper cooling system pressure
• Reduces the risk of repeat repairs with trustworthy materials
• Ensures a smoother installation process with precise OE matching
• Restores vehicle reliability with a proven aftermarket solution
• Backed by over a century of automotive expertise

Application

Ideal for mechanics and DIY enthusiasts repairing cooling system leaks on older Ford, Mercury, and Dodge engines. Commonly used during engine rebuilds, coolant flushes, or when addressing visible corrosion around engine block plugs.

Fitment Notes

• Compatible with select Ford models from 1961 to 1996
• Compatible with select Mercury models from 1961 to 1983
• Compatible with select Dodge models from 1989 to 2005
• Replaces OEM numbers Ford 352532S and Chrysler 4429955

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
• Backed by a team of product experts in the United States
• Focuses on fit, durability, and dependable performance to restore vehicle confidence

What's in the Box

• 10 pieces of steel cup expansion plugs

Item Dimensions

• Package: 6.0in x 4.0in x 1.5in
• Weight: 0.1lbs