Engine overheating refers to a complex of processes occurring in a BMW engine caused by an increase in the temperature of the coolant above the established norm. These processes are not always safe and the consequences are reversible. Depending on the degree of thermal impact on the parts, the consequences can be very different, up to a major overhaul of the engine.
All modern BMW cars are equipped with a large number of engine overheating control systems, therefore, this often happens on cars of earlier versions that have already undergone significant “improvements”.
- High temperature on the instrument panel.
- Noticeable detonation in the engine.
- Loss of engine power.
- Boiling of coolant in the system. This is noticeable only when opening the filler neck of the cooling system reservoir.
- Unusual sound in the engine.
Causes of overheating
- The cleanliness of the radiator is broken. This is dust, dirt and a very popular poplar fluff. The radiator needs to be flushed and cleaned.
- The radiator is clogged with wear products of the cooling system. It can be washed, but, unfortunately, more often in this situation it has to be changed.
- Coolant level drop below critical level. Repair leaks and top up to working level.
- Very high load on the engine, caused, for example, by a long uphill climb. Reduce the load and let the engine “rest”, and do not turn it off.
- The thermostat does not work, which, after heating the liquid to a certain value, should switch to another circulation mode. Replace thermostat.
- The quality of antifreeze does not meet the requirements of the manufacturer, so it does not have all the properties that the engine expects from it.
- The intake and exhaust processes, the ignition timing, incorrect operation of the gas distribution system, the fuel supply process is disrupted (more than normal is supplied).
- The radiator fan is not working.
- The pump is not working efficiently enough.
- A dirty engine in very hot weather worsens the cooling process by 10-20%, depending on the degree of contamination.
How to avoid?
- Do not overload the engine in hot weather and when driving uphill.
- Keep the cooling system clean, this applies to the radiator, fluid.
- Keep the engine clean.
- Timely change antifreeze. Typically, once every three years.
- Get checked regularly, about once every six months. In this case, all points related to the incorrect operation of various systems will be eliminated.
In conclusion, I would like to remind you that BMW engines are very powerful and it is very important not to allow them to overheat!