Overheating in my 2006 325i

06E90Rostik · 08-03-2014, 05:08 PM

Long story short, had to pull over this past weekend to let it cool down because had those thermometer symbols appear in yellow then red. Checked coolant level, full, at least within the norm. Fan works. Water pump works, I tried to do a venting procedure, can definitely hear it slushing water around and when touching hoses can feel that coolant is being pumped thru. The thermostat is kaput, I know it because when scanning with my (non BMW) OBD reader it shows a error code with something like "thermostat circuit open". But as far as I know they fail in open position, so should not contribute to overheating. What could be the issue? Car is 2006 E90 325i with about 70k miles

MarkkyyMan · 08-03-2014, 05:26 PM

It throwing any other codes?

koches · 08-03-2014, 05:32 PM

In my 06 I had a similar issue and I changed my thermo and water pump and back to normal. Not cheap fix but it's gotta be done on these cars. Good luck.

06E90Rostik · 08-03-2014, 06:27 PM

No other codes, no check engine light either. Really hoping it isn't a water pump, those things not only cost a lot they are a pain to replace too

dtea604 · 08-03-2014, 08:01 PM

70k miles soundss like ur pumps going. Had the same issue. And it was the waterpump + tstat.

08-03-2014, 05:08 PM	#1
06E90Rostik 2006 join date crew 182 Rep 1,482 Posts Drives: 2006 325i, 2011 335i Join Date: Feb 2006 Location: CA, Sacramento iTrader: (10) Garage List 2011 335i [10.00] 2006 325i [0.00]	Overheating in my 2006 325i Long story short, had to pull over this past weekend to let it cool down because had those thermometer symbols appear in yellow then red. Checked coolant level, full, at least within the norm. Fan works. Water pump works, I tried to do a venting procedure, can definitely hear it slushing water around and when touching hoses can feel that coolant is being pumped thru. The thermostat is kaput, I know it because when scanning with my (non BMW) OBD reader it shows a error code with something like "thermostat circuit open". But as far as I know they fail in open position, so should not contribute to overheating. What could be the issue? Car is 2006 E90 325i with about 70k miles
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08-03-2014, 05:26 PM	#2
MarkkyyMan Captain 38 Rep 701 Posts Drives: 2010 BMW 128i Join Date: Dec 2009 Location: Indiana, U.S. iTrader: (0)	It throwing any other codes?
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08-03-2014, 05:32 PM	#3
koches Captain 44 Rep 604 Posts Drives: 2009 328i xDrive Join Date: Jul 2013 Location: Baltimore, MD iTrader: (0) Garage List 2009 BMW 328i xDrive [0.00]	In my 06 I had a similar issue and I changed my thermo and water pump and back to normal. Not cheap fix but it's gotta be done on these cars. Good luck.
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08-03-2014, 06:27 PM	#4
06E90Rostik 2006 join date crew 182 Rep 1,482 Posts Drives: 2006 325i, 2011 335i Join Date: Feb 2006 Location: CA, Sacramento iTrader: (10) Garage List 2011 335i [10.00] 2006 325i [0.00]	No other codes, no check engine light either. Really hoping it isn't a water pump, those things not only cost a lot they are a pain to replace too
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08-03-2014, 08:01 PM	#5
dtea604 Lieutenant 28 Rep 544 Posts Drives: 06 E90 325i Join Date: Jan 2012 Location: Vancouver iTrader: (0)	70k miles soundss like ur pumps going. Had the same issue. And it was the waterpump + tstat.
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