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      08-11-2013, 03:24 PM   #62
Reapur
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Drives: 2009 135i
Join Date: May 2013
Location: Toronto

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Quote:
Originally Posted by kenmasters
Quote:
Originally Posted by Reapur View Post
The water pump running after the car is shut down is normal.

It's one of the reasons bmw used an electric pump. It runs to circulate coolant through the turbos to prevent coking. Our turbos have oil and water cooling, this process does away with needing a turbo timer and having the engine run after a hard drive.
The independent shop that I went to that specializes in BMWs says this is not normal. Only the fan remains on, not the water pump. ? They BSing me?
Have you tried wiggling the contacts to see if one is loose?

Why would the radiator fan run alone when an electric pump could physically move water through the entire engine and turbos? On a traditional setup with a belt or chain driven pump the fan is the only option but an electric pump can do it while the engine is off. Think about it ...
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