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Engine Expansion Plug

An engine expansion plug, often referred to as a freeze plug or core plug, is a small, round disc-shaped component used to seal the holes in an engine's block or cylinder head. These plugs are primarily designed to prevent the engine coolant from freezing and damaging the engine block during cold temperatures. Additionally, they play a role in the casting process of the engine block, serving as a temporary seal during manufacturing. Engine expansion plugs are commonly installed in various locations throughout the engine, including the sides of the engine block and the cylinder head.

Choosing the correct engine expansion plug is crucial for maintaining the integrity of your engine's cooling system. The size and type of expansion plug needed can vary depending on your vehicle's make, model, and engine configuration. It's essential to measure the diameter of the hole where the expansion plug will be installed accurately. Common sizes include the 7/8 expansion plug, which is used in many applications. Ensuring a proper fit and seal is essential to prevent coolant leaks and potential engine damage.

JEGS offers a selection of high-quality engine expansion plugs to meet your vehicle's needs. Our range includes various sizes and types of expansion plugs, allowing you to find the right fit for your engine. Whether you're replacing a damaged plug or performing an engine rebuild, our expansion plugs are made from durable materials to provide reliable sealing and protection against coolant leaks. With JEGS, you can trust that you're getting expansion plugs that are designed to withstand the demands of your engine's cooling system, helping you maintain optimal performance and preventing potential issues.

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