Core plugs are sealing components installed in automotive engine blocks to seal core holes left from casting processes.
Core plugs, also known as freeze plugs or expansion plugs, are disc-shaped metal components installed in engine blocks to seal openings created during the casting process. These openings allow for the removal of sand cores used to form internal coolant passages. Core plugs provide a pressure-tight seal while allowing for thermal expansion and contraction of the engine block material.
诱因 → 失效模式 → 工程缓解
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Core plugs seal openings left from the casting process where sand cores were removed. They prevent coolant leakage while allowing for thermal expansion of the engine block material.
They are called freeze plugs because in freezing conditions, if coolant expands due to freezing, the domed design allows the plug to pop out rather than cracking the engine block, though this is a secondary safety function rather than their primary purpose.
Steel (often galvanized), brass, and stainless steel are the most common materials. Brass offers good corrosion resistance, while stainless steel provides superior durability in harsh conditions.
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