Dorman Engine Expansion Plug

Dorman engine expansion plugs, also called freeze plugs, core plugs, welch plugs or engine block plugs, seal the casting holes in an engine block, cylinder head or related housing. These holes are left behind during manufacturing. A new plug restores a leak-free seal and helps keep coolant and oil where they belong.

Key Features:

• Replaces worn, rusted or leaking expansion plugs
• Designed to press into the casting bore and expand to hold a tight seal
• Helps prevent coolant and oil leaks that can lead to overheating and engine damage
• Made for durability in the heat, pressure and corrosive conditions inside an engine
• Available in multiple styles and configurations to suit different applications

Dorman is a well-known name in aftermarket replacement parts and offers a wide range of repair solutions for professional technicians and DIY enthusiasts. Select the exact part number for your application from the options listed on this page.