Dorman Autograde Steel Cup Engine Expansion Plug 1-3/16 Inch with 0.510 Inch Height for Engine Repair 555-021

Steel cup engine expansion plug 1-3/16 inch with 0.510 inch height used to replace worn or leaking factory core plugs in automotive engines.

Built to meet the manufacturer's design intent for reliable service, this expansion 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 corrosion resistance
• Precise 1-3/16 inch outer diameter for accurate fitment
• Features a 0.510 inch height dimension
• Engineered to match original equipment form and function
• Sold as a 10-piece pack for multiple replacements
• Direct replacement for Pioneer part number EPC-134

Benefits

• Restores engine sealing to prevent coolant or oil leaks
• Reduces the risk of repeat repairs with trustworthy quality
• Ensures smoother installation with direct-fit design
• Provides reliable performance for daily driving demands
• Offers cost-effective solution with bulk 10-pack quantity
• Backed by over a century of automotive experience

Application

Ideal for mechanics and DIY enthusiasts performing engine overhauls, cooling system repairs, or block maintenance where original expansion plugs have corroded or failed.

Fitment Notes

• Universal application for engines requiring 1-3/16 inch steel cup plugs
• Verify specific engine block requirements before installation
• Compatible as a replacement for Pioneer EPC-134

Why Choose Dorman - Autograde?

• Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function
• Strong focus on fit, durability, and dependable performance restores vehicles with confidence
• Validated through testing to stand up to daily driving demands
• Supported by a team of product experts in the United States

What's in the Box

• 10 pieces of Steel Cup Expansion Plugs

Item Dimensions

• Package Length: 3.7 inches
• Package Width: 2.4 inches
• Package Height: 2.2 inches
• Weight: 0.4 lbs