Question about BMW 318
Hi, the problem you are having is going to be with the fan switch that turns the fan on now if you are sure the fan is not working and the problem is not thermostat or water pump related then all you need to do is follow the wire from the fan and where this wire goes to is the temerature controlled switch for the fan.
the best thing for you to do would be to get the part first so you know exactly what part your going to be changing, its not a difficult job to do but remember your going to loose some coolant so this will need topping up and any air in the system will need bleeding out.
Now other causes of over heating could be thermostat if this was at fault then the bottom half of the rad would be hot and the top half will be cold so if it over heats and the rad is like that than that points towards thermostat failure, you can also tell by putting the heater on in the car and if it blows out only cool air then this means the coolant isnt circulating properly and this would be due to thermostat.
so if you have heat and the temp gauge goes up to the hot and the rad is hot all over then this points towards the rad fan switch not working.
check your car to make sure then go and buy the part then you will see exactly what your changing.
let me know how you get on or if you need further assistance ok
Posted on Jul 16, 2010
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Posted on Jan 02, 2017
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