How to Read the Coolant Float in a BMW?
2 Answers
The method for checking the coolant float in a BMW is as follows: 1. When adding coolant to a BMW, the plastic float inside the coolant reservoir will move up and down as the coolant level changes. 2. You can determine the amount of coolant by observing where the scale on the float aligns with the coolant level. Below is some information about coolant: 1. The full name of coolant is antifreeze coolant. It has two main functions: the first is to prevent freezing, and the second is to cool; 2. Coolant prevents the vehicle's cooling system from cracking due to coolant freezing when the vehicle is parked in cold winter conditions.
Having driven a BMW for several years, checking the coolant float is actually quite simple. Generally, after the engine has cooled down, open the hood and locate the transparent reservoir marked with MIN and MAX—that's the coolant overflow tank. The float is usually a small rod or ball floating in the liquid. As long as the fluid level is between MIN and MAX, it's normal; if it's below MIN, you'll need to top up the coolant. Once, during a long trip, I neglected to check, and the level dropped too low, triggering an overheating alarm. Fortunately, I pulled over in time and added genuine coolant to avoid major issues. I recommend taking a quick glance every weekend or before refueling—after all, coolant is crucial for engine cooling, and a shortage can lead to costly repairs. Also, before adding coolant, make sure the car is cold, open the cap carefully to avoid steam burns, and avoid mixing incompatible types to prevent system corrosion. Maintaining this habit keeps your car reliable and durable, saving you from waiting for warning lights to appear.
