A freeze plug is a metal disk that is inserted into a hole in the engine block. The purpose of the freeze plug is to provide a way for water to expand when it freezes, without damaging the engine. If a freeze plug becomes damaged or starts to leak, it can cause serious problems for your engine.
If you have a leaking freeze plug, it is important to get it fixed as soon as possible. Driving with a leaking freeze plug can damage your engine and lead to expensive repairs. It is also important to keep an eye on your coolant level if you have a leaky freeze plug, as this can cause your engine to overheat.