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Freeze/Core Plugs

Freeze/Core Plugs

A freeze plug, also known as a core plug or expansion plug, is a vital component in an engine's cooling system, designed to prevent damage caused by freezing coolant. These plugs are typically installed in various locations throughout the engine block and cylinder head, covering passages that are used during the casting process. In the event of freezing temperatures, the freeze plugs are designed to pop out, relieving pressure and preventing the engine block from cracking due to the expansion of freezing coolant. While they are often referred to as "freeze plugs," their primary function is actually to protect the engine from damage caused by overheating, not freezing.

When selecting the correct freeze plug for your vehicle, there are several factors to consider to ensure proper fitment and performance. Firstly, determine your vehicle's specific make, model, and engine configuration, as freeze plugs are designed to fit particular engine types and sizes. Consider the material and construction of the freeze plugs, opting for high-quality materials such as brass or steel for durability and resistance to corrosion. Pay attention to the size and shape of the freeze plug, ensuring it matches the dimensions of the engine block or cylinder head opening for a secure and leak-free seal.

At JEGS, we offer a comprehensive selection of freeze plugs and accessories to meet the needs of automotive enthusiasts and DIY mechanics. Our inventory includes a variety of freeze plugs from leading manufacturers, crafted with precision engineering and quality materials to ensure reliable performance and durability. Whether you're performing routine maintenance on your daily driver or rebuilding an engine for your project car, our range of freeze plugs provides enthusiasts with options to suit different vehicle applications and preferences. Explore our collection today and keep your engine protected with JEGS.

What is a Freeze Plug?

A freeze plug, also known as a core plug, is a small disc-shaped plug made of metal that is used in the engine block and cylinder head of an internal combustion engine. Its primary purpose is to seal the openings left during the manufacturing process of the engine's casting. These openings are used to remove sand and other debris that can accumulate during the casting process. Once the casting is complete, freeze plugs are installed to seal these openings and prevent any leaks.

What is a Core Plug Used For?

Core plugs, also called freeze plugs, serve a crucial role in an engine's design. Besides sealing the openings left during casting, core plugs are designed to provide a point of access for cleaning and maintenance of the cooling passages within the engine block. Over time, the core plugs can deteriorate due to corrosion or engine heat, potentially leading to leaks. It's important to regularly inspect these plugs and replace them as needed to prevent coolant leaks that can lead to overheating and engine damage.

Freeze Plug Vs. Core Plug

The terms "freeze plug" and "core plug" are often used interchangeably to refer to the same engine component. However, the term "freeze plug" can be misleading, as these plugs are not designed to protect the engine from freezing. Instead, they serve as access points during the manufacturing process and allow for maintenance. Regardless of the term used, these plugs play an essential role in maintaining the integrity of an engine's cooling system.

At JEGS, we offer a variety of freeze plugs and core plugs to suit different engine types and applications. Proper maintenance and replacement of these plugs can help ensure the reliability and performance of your engine.

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