Yes does look like good quality , as a rule in an un powered condition the valves are sprung so water can flow ....so if you had any sort of wiring fault or power failure to the valves you will still have heat for demisting purposes .
Perhaps the pumping motor uses magnetic attraction to spin an impeller on the other side of the case ,because if the engine water pump was running at the same time could this over speed the electric pump ?? just thinking a loud here .
These type of valves fail on BMW’s quite a bit , but when you take them apart the valves are normally rusted to death and the seals have rotted away and jamming the valve up , yours look quite fresh there Snap D .
Thanks for taking it apart so we can see how it works ....always good to have an understanding how things work
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3rd December 2017, 08:05 PM
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