A water leek can be a nightmare for car owners. Sometimes your car will develop a slow leak which will require the water reservoir to be topped up every week or so and other times it will develop a sudden, fast water leak which needs attention immediately. Do not be tempted to drive a car which has a major water leak too far as it could cause the engine to overheat and if that happens you could find that you damage the engine (which will often cost a lot more to repair). If it is only a slow water leak then you can add some radiator welding solution that will go around the cooling system of the car ad find where the leak is. It will then work at setting in the hole and blocking the leak, sometimes this will work and will last for a long time other times it simply doesn’t work at all or only lasts a week or so.