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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 01-17-2014, 08:41 PM
jobhopeful jobhopeful is offline
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New Water Pump Overheating

e90 2006 330i Car is overheating. Replaced 2 coolant temp sensors, new water pump, new coolant, changed thermostat 6 months ago. No obd2 codes. Ran INPA and no error codes are present. Any ideas what else could be causing the problem?
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  #2  
Old 01-17-2014, 08:44 PM
fdriller9 fdriller9 is offline
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Did you bleed the system?
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  #3  
Old 01-17-2014, 08:46 PM
jobhopeful jobhopeful is offline
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Yes I did.
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Old 01-18-2014, 05:59 AM
fdriller9 fdriller9 is offline
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I would try running the bleed procedure again. Listen to the pump and see if its working.

Maybe there is blockage somewhere.

Did you do a 50/50 mix with distilled water?

Is it overheating shortly after start up? Or after a decently long drive?
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Old 01-18-2014, 06:06 AM
jobhopeful jobhopeful is offline
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This new pump is more audible than the old one. I did mix coolant with distilled water. It heats up after a while of driving. It just slowly keeps going up and increases faster on freeway.
If I stand in front of car the hose going into oil filter housing is very hot. The hose going from thermostat to radiator is cool. To me it seems like the temp difference should be warmer and more consistent. Could the coolant not be going through radiator or thermostat opening to late since no codes present?
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Old 01-18-2014, 07:58 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by jobhopeful View Post
e90 2006 330i Car is overheating. Replaced 2 coolant temp sensors, new water pump, new coolant, changed thermostat 6 months ago. No obd2 codes. Ran INPA and no error codes are present. Any ideas what else could be causing the problem?

Overheating.

No code?

Whaaaaa?
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Old 01-18-2014, 08:22 AM
jobhopeful jobhopeful is offline
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Old 01-18-2014, 08:41 PM
fdriller9 fdriller9 is offline
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Is your radiator fan working? If it's overheating, that fan should be screaming. Even after shut down.

Make sure it's working/plugged in
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Old 01-18-2014, 08:46 PM
jobhopeful jobhopeful is offline
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Yes its working. You can hear it in the video but it only kicks on when the engine is about to overheat. But if I unplug one of the coolant sensors the fun fans continually and speeds up as it heats up. But still keeps getting hot. I'm going to take out radiator and clean. Check for blockage.
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Old 01-18-2014, 08:49 PM
fdriller9 fdriller9 is offline
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Check the oil filter housing gasket as well. Not sure how the coolant is routed through the housing on E9x but for E46, the gasket was notorious for breaking down and chunking into the coolant system, either creating blockage or impeller damage.
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  #11  
Old 01-18-2014, 08:51 PM
jobhopeful jobhopeful is offline
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Just changed the oil filter housing gasket 6 months ago.
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  #12  
Old 01-21-2014, 07:42 AM
jobhopeful jobhopeful is offline
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The problem was the thermostat was stuck closed. I replaced it with a new one and the problem has finally been solved.
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