![]() ![]() Low coolant is a problem for your car’s cooling system, especially in a performance vehicle like a BMW that requires higher quality conditions to run optimally.īMWs are basically a complex network of communicating technology. Of course, it is highly possible that the illuminated light is indeed correct and that your coolant level is not where it should be. Since most modern vehicles, including most BMWs, utilize coolant that’s developed to last a significant amount of time, the low coolant light is concerning. You might be surprised to learn that a “low coolant” light doesn’t necessarily mean that coolant is low but there could be other issues, including failing parts leading to coolant becoming low over time. What Factors Might Cause the Coolant Light to Come on? In this article, you’ll discover some of the potential issues that could contribute to the low coolant light coming on, and what you can do to prevent these issues. For instance, when your BMW’s dash displays the “low coolant” light, it emits a code that lets the diagnosing professional know what avenue to take for treatment. Noticing the lights that illuminate in the dashboard is the most common way that problems are communicated to the driver-and to automotive professionals for that matter. However, when something does come up, it’s critical that we pay attention to the warning signs our car is trying to communicate to us.īeing aware of the ways our car attempts to alert us of issues is nearly as important as following through with ongoing maintenance. Caring for your BMW is the best way to combat problems from affecting your vehicle’s performance and reliability. So if you do end up replacing the tank, pay attention to the sensor connection, maybe keep the original sensor in case you need it like I did.While BMWs are well-known worldwide for their stamina, endurance, and exceptional quality of engineering and design, they still encounter issues like every other mechanically-engineered item. But it was definitely the sensor causing trouble. Not sure if the new sensor was just failing, had inferior connectors, or was of inferior design (it is way different materials). ![]() So I simply plugged the original sensor back into the new tank. My findings were enough to warrant a change in sensor. The blades in the new tank sensor's connector are thinner than on the original, causing a weaker/poor connection.The new tank sensor's post that extends up into the "hole" in the tank is 1/8" shorter than my original (yes I kept it - I am like that).Tank is fine and no fluid loss so I looked into the sensor that plugs into the tank in the bottom. Recently I started having intermittent low coolant warnings. I did replace the coolant tank with a new one. I figured I would add to this thread since my experience is related. Keep an eye on the coolant level and investigate further if it drops or there is air in the system again. When the engine is switched off and cools down again, coolant is drawn back from the Overflow Bottle to the Expansion Tank to maintain the correct level. JAGUAR XK8 - Expansion Tank & Recovery Bottle.pdfĪs the engine gets up to temperature and the coolant expands, excess from the Expansion Tank is piped to the Overflow Bottle. The Expansion Tank is connected to an Overflow Bottle in the front wheelarch: If you get air in the system at other times, there may be a leak. The coolant temperature gauge (if you have the three centre gauges) is little more than decorative and won't move much until the engine is dangerously overheated.Īir in the system other than after the radiator has been flushed and refilled is unusual. This is the sensor that trips the warning message and does so because of low coolant volume. Please register or login to enable Dark Mode.ĭid you check this recent thread for problems with the Coolant Level Sensor in the bottom of the Expansion Tank.Forum announcement archives / Forum History.PRIVATE For Sale / Trade or Buy Classifieds.Other Jaguar Models / Concepts / Replicas.S-Type / S type R Supercharged V8 ( X200 ).Jaguar Forums Feedback & Suggestion Center.
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