Q: I have a 2001 BMW 325i. It overheated, engine shut down. When cooled down (24 hours), while water poured in the reservoir I could

I’m not clear on where you see your leak, but if it is in the radiator tank itself, that will mean you at least need a radiator. If the car ran hot until it shut off, there may have been other damage to the engine as well. Many of the 325’s had a problem with a seal where the head gasket meets the front cover and allows coolant to get into the crankcase. You would do well to have this car thoroughly checked out before you operate it again. You can have that done at your convenience by contacting Your Mechanic. They can send a technician to your home or office to check out your overheating problem and let you know what it is going to take to fix it.