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Old 09-01-2017, 10:34 PM   #1
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auxiliary coolant pump question.

When and how long should that pump be running?
I fitted a new one a couple of days ago and now I can hear it humming when I start the car on the morning and it runs more or less until the car reached its proper temperature .
I never noticed it running before.
I can hear the new pump humming softly from inside the car .
Now I'm wondering if that's what it ment to do .??!
Any advice is greatly appreciated (-:
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Old 10-01-2017, 12:14 PM   #2
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I dont know if mine runs or not .Just that everything is working ok with the heater .If faulty you will have a little less heat. Thats because the coolant wont circulate enough to get warm coolant in to the mono valve . The aircon will make changes to the auxiliary pump for circulation .
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Old 10-01-2017, 12:29 PM   #3
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What year is the 200E?

Dec
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Old 11-01-2017, 11:55 AM   #4
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Old 11-01-2017, 11:04 PM   #5
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1989

Sorry for late reply, am abroad, back home tomorrow
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Old 11-01-2017, 11:07 PM   #6
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Was at a dealer while in Munich yesterday, apparently the pump does run when you start the engine to help the water pump when the engine is still cold .
My car hast got air-con.
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