The pipes connecting to your radiator can become brittle.You will need to have the entire tank replaced if this is the case. It cracks easily compared to other expansion tanks, spilling out coolant fluid. Plastic is not the most durable material. The expansion tank of this model is made of plastic.The leak could be coming from a few different places for different reasons, causing reactions that have dire consequences if not treated. At this point, you may need extensive repairs.Įvery symptom indicates that there is something deeper going on that you should be concerned about. This is a severe sign that your coolant has been leaking for too long and that you are operating the BMW on high heat. Coolant smells significantly sweeter and lighter than oil or gasoline. If the asphalt makes it hard to tell what color it is, look for a sweet smell. If you notice blue liquid pooling underneath your car, your coolant is likely leaking. The coolant fluid that goes into a BMW is usually blue.If you know your vehicle should not be out of coolant yet, you have a leak on your hands. It could just be that it has been too long since you have. First, make sure that you had the fluid topped off recently enough. This is a pretty obvious sign that your coolant is leaking. The hotter it gets, the more damage it does. You should stop driving it right away if it is. Look at your temperature gauge often to detect the trend and tell if your BMW really is overheating. Most should be easily noticeable once you know what to look for. There are a few symptoms that could be indicative of a coolant leak in your BMW. We are going to help you learn what the warning signs of a coolant leak are, why they happen, what happens if the leak is not fixed, and where to go to get your problem solved. If you own one of these manufactured between the years 19, this may be what you are experiencing. One of the most common problems with the e46 3 Series model of a BMW is coolant leaking from the expansion tank.
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