compromised head gasket burning up coolant (no leak).damaged or broken radiator seal affecting pressure in coolant system.Some of the vehicular problems that could be causing your low coolant levels include: Most of the reasons your coolant may be low are serious problems and need to be diagnosed and fixed by a qualified automotive technician. If you take your car to an automotive shop, they can perform a diagnostic check on your vehicle’s computer to determine if the sensor is faulty, and replace it if needed. If your coolant light is on, but the coolant is not low in the reservoir and it appears there are no leaks, then your vehicle may have a coolant sensor malfunction.Ī faulty coolant sensor can falsely trigger the dashboard warning light. Most vehicles have a sensor that floats in the coolant tank and when the coolant level gets too low, then the sensor is triggered. If there is no underlying problem, then you can refill the coolant yourself, but may want to consider getting a coolant change from an automotive shop. If this is the case then there could be another problem causing the coolant to become low. This is the most common reason for the coolant warning light turning on. The coolant light on your vehicle’s dashboard could illuminate for the following reasons: Coolant is Low Reasons Coolant Light Might be Illuminated Without this process, the engine will overheat and lead to dangerous and expensive damages. Coolant is pumped around the vehicle’s engine during operation to prevent that from happening. When in operation, your vehicle’s engine creates a significant amount of heat, strong enough to potentially cause the engine to weld itself together. It is important for you to understand what the light means, and why it might have come one, so you can respond accordingly to ensure the best care for your vehicle. Lights on your vehicle’s dashboard is the most common way your vehicle can communicate a problem to you. This will illuminate a warning signal on your vehicle’s dashboard. These glamorous cars are still capable of vehicle issues, such as a problem with your coolant. Total hardness, max.: 3.6 mmol Ca 2+/ltr.BMWs have an established reputation for power and performance. Total hardness, max.: 20° dH (German hardness grade) or in new measuring unit: Minimum requirements concerning water quality: In many of our countries the tap water is sufficient see this from BMW (So long as it is mixed with the right antifreeze): It isn't a given that distilled water must be used. If the engine does consume coolant due to a leaking head gasket, the sealed system will be further pressurised by the combustion gases and could cause failure elsewhere in the coolant system where coolant will escape. I have a 530d that hasn't consumed a drop over the 7 years of ownership. Unless there is a leak, or the engine is consuming coolant via the head gasket or other failed water-cooled component connected to the engine intake/exhaust systems, the level should not drop. If yours is losing coolant, get it checked out by someone with the right tools to diagnose either a pressure drop (all coolant removed method) or for the presence of combustion gases in the coolant (with the engine running). These are sealed, pressurised systems that should remain that way (there is a pressure relief valve in the expansion tank cap). (Unless your car has had its coolant replaced with non-BMW specific coolant over time- use the appropriate one for the situation)Ĭoolant systems should not lose coolant as a general rule of thumb. BMW's is longlife so rather than save a few dollars, buy the right stuff from BMW. (Coolant has antifreeze and anti corrosive properties that Water alone does not provide)ĭon't mix coolants. If you must top up have a quantity of ready mixed 50:50 of the appropriate coolant with water handy. My twopence worth on cooling systems and coolant (A number of these points have been made before in this thread):
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