QualCast 97-164 Expansion Plug / Welch Plug

The QualCast 97-164 is a precision-manufactured expansion plug, also commonly known as a Welch plug, freeze plug, or core plug. Designed for use in engine blocks, cylinder heads, and other cast components, this plug seals core passages left over from the casting process and helps protect the engine from coolant leaks.

Key Features:

• Manufactured from high-quality steel for durability and long service life
• Cup-style design ensures a secure, leak-free press-fit installation
• Engineered to tight tolerances for a precise fit in OEM-spec bores
• Resistant to corrosion in coolant environments
• Direct replacement for worn, corroded, or damaged original expansion plugs

QualCast expansion plugs are a trusted choice for professional mechanics and DIY engine builders alike. The 97-164 is part of QualCast's extensive line of cup-style expansion plugs, covering a wide range of domestic and import engine applications. Always verify bore diameter and plug depth against your specific engine specifications before installation.