Qualcast Expansion Plug

Qualcast expansion plugs, also called freeze plugs, core plugs or welch plugs, seal the casting holes and coolant passages in engine blocks and cylinder heads. They're designed to give a tight, leak-resistant seal once installed, and they help protect the engine from coolant and oil leaks.

Key Features:

• Made by Qualcast, a U.S. supplier of engine expansion plugs and related engine hardware
• Built from high-quality metal and offered in a wide range of cup designs
• Available across the Qualcast line in steel, brass and stainless steel. Brass and stainless are recommended for marine, performance and heavy-duty use
• Press-fit design seals the bore by expanding against it, so installation is simple during an engine rebuild or core plug replacement

Replacing expansion plugs during an engine rebuild or when a plug shows seepage or corrosion helps keep the cooling system and block passages sealed. Choose Qualcast expansion plugs for a dependable, quality-built replacement.