Dorman Autograde Steel Cup Engine Expansion Plug 1-5/8 Inch with 0.450 Inch Height 555-031

Steel cup engine expansion plug 1-5/8 inch with 0.450 inch height used to replace worn or leaking original plugs in automotive engines.

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 under engine operating conditions.

Key Features

• Constructed from durable steel for resistance against corrosion and wear
• Precise 1-5/8 inch diameter with 0.450 inch height for accurate fitment
• Engineered to match the form, fit, and function of original equipment
• Validated through testing to ensure dependable performance
• Sold as a 10-piece pack for multiple replacements or inventory

Benefits

• Restores proper engine sealing to prevent coolant or oil leaks
• Reduces the risk of repeat repairs with robust material construction
• Ensures smoother installation with direct-fit OE specifications
• Provides cost-effective maintenance solution in bulk packaging
• Helps maintain optimal engine temperature and pressure levels

Application

Ideal for mechanics and DIY enthusiasts performing engine block repairs, freeze plug replacements, or general maintenance on vehicles requiring a 1-5/8 inch steel cup plug.

Fitment Notes

• Specific vehicle fitment not provided in manufacturer data
• Verify engine block hole diameter and depth before installation
• Compatible with applications requiring Pioneer EPS-126 equivalent

Why Choose Dorman?

• Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function
• Backed by a team of product experts in the United States and over a century of automotive experience
• Built with quality materials to stand up to daily driving demands

What's in the Box

• 10 Piece Engine Expansion Plug Set

Item Dimensions

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