The 25 mm core plug is a round closing plug for the engine cooling system. It closes an opening in the engine block and helps prevent coolant leakage. The plug is used on older Citroën engines with a matching dimension system. The 25 mm diameter allows installation in seats designed for this size. The material is suitable for operation under varying engine temperatures. The plug can serve as a replacement part during service or overhaul. Installation requires a clean contact surface and correct alignment to support proper sealing and reliable operation of the cooling system in regular vehicle use.
