DNJ® Expansion / Freeze Plug Sets are precision-engineered to seal the casting core holes found in engine blocks and cylinder heads, preserving the integrity of the engine’s cooling system. Each kit includes a complete set of expansion plugs specifically designed for various engine applications, and may feature cup-style, disc-type, or rubber plugs depending on the engine’s configuration. DNJ® Expansion / Freeze Plug Sets are manufactured to meet or exceed OEM quality standards.
DNJ® Expansion / Freeze Plug Sets feature high-quality materials such as steel, brass, and stainless steel. These materials are selected for their superior strength, heat resistance, and corrosion resistance, ensuring durability and a dependable seal under the extreme conditions of engine operation. Each plug is engineered to provide a tight, lasting fit that prevents coolant leakage and contributes to the long-term reliability of the engine.
DNJ® also offers a full line of related cooling and engine components, including timing belt kit with water pumps, timing chain kit with water pumps, and more. With precision engineering and top-tier materials, DNJ® Expansion / Freeze Plug Sets deliver exceptional performance and long-lasting durability.
