Disassembly of the front cover and removal of the water pump allowed for inspection of the pump.
Bmw electric water pump rebuild.
This bmw 540 has was diagnosed with a defective engine coolant pump.
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Gone are the days of a engine belt driven water pump on late model bmw s.
Symptoms were overheating and damaged drive belt system.
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The electric water pump of bmw is unique from the contemporary water pumps used in other cars.
Here are the reasons behind its failing and the symptoms associated with a bad electric water pump.
However it also malfunctions usually.
How the mode of failure with this pump appears to be simple age and miles likely exasperated by a lack of coolant changes.