Using this Mishimoto coolant overflow tank is easy. First, make sure your engine is cool before you start. Remove the old overflow tank carefully and then install the new Mishimoto tank in its place. It's designed to fit perfectly with your vehicle's radiator. Check the sight glass regularly to keep an eye on the coolant level. If it's low, add the appropriate coolant. When it comes to maintenance, there's not much to do. Just keep the tank clean and check for any signs of damage, like leaks or cracks. If you notice anything wrong, contact Mishimoto as it's covered by their lifetime warranty. Remember, always follow your vehicle's manual for specific instructions and safety precautions.