Thread: N54 water pump
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      11-19-2012, 02:41 PM   #1
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Drives: 335i Sport
Join Date: May 2012
Location: c

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N54 water pump

I have a question. The other day I was on the highway where I did some hard pulls and as I was coming up to my exit I noticed the water temp had dropped down to around 180. Then as I came to a stop at the street light it came back up to 210 like normal. Could this be a sign the water pump is on its way out? Since the early water pump codes say fan speed below normal, I always thought that would cause an increase in water temp though.

I have yet to see the water temp fluctuate like that, but I've done mostly city driving lately and this was the first time I've driven the car hard on the highway in a while.