Dorman Autograde Steel Cup Expansion Plug 18mm with 0.230in Height for Chevrolet Ford GMC Mercury Toyota 555-102

Steel cup expansion plug 18mm with 0.230in height for Chevrolet Ford GMC Mercury and Toyota engines used to replace worn or leaking factory core plugs.

Built to meet the manufacturer's design intent for reliable service using quality steel materials engineered to match original equipment specifications for a secure seal.

Key Features

• Constructed from durable steel for long-lasting corrosion resistance
• Precise 18mm diameter with 0.230 inch height for accurate fitment
• Direct replacement for specified OEM part numbers across multiple brands
• Engineered to match original form fit and function
• Validated through testing to ensure dependable performance

Benefits

• Stops coolant leaks caused by failed or corroded expansion plugs
• Restores engine cooling system integrity without modification
• Reduces risk of repeat repairs with robust material construction
• Ensures smoother installation with OE-matching dimensions
• Provides a cost-effective solution compared to dealer parts
• Backed by over a century of automotive expertise

Application

Ideal for mechanics and DIY enthusiasts repairing coolant leaks in older Chevrolet Ford GMC Mercury and Toyota vehicles requiring a 18mm steel cup plug to seal engine block or cylinder head openings.

Fitment Notes

• Compatible with select Chevrolet models from 1982 to 1985
• Compatible with select Ford models from 1981 to 2004
• Compatible with select GMC models from 1984 to 1985
• Compatible with select Mercury models from 1991 to 1999
• Compatible with select Toyota models from 1984 to 1997
• Verify vehicle compatibility using part number 555-102 before purchase

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
• Supported by a team of product experts in the United States
• Delivers proven aftermarket solutions to keep your vehicle operating correctly

What's in the Box

• 10 Piece Set of Steel Cup Expansion Plugs

Item Dimensions

• Package Length: 3.2 inches
• Package Width: 2.4 inches
• Package Height: 1.5 inches
• Weight: 0.2 lbs