Inside N52 Water Pump

Bavarian Tech · 11-19-2012, 07:59 PM

Early production e90, concern of overheating issue...ended up needing a new water pump. Was a slow day @ work,figured why not take it apart

sibhusky · 11-21-2012, 08:57 PM

Good job, You can obviously see the DC motor and its stator windings inside which look in great shape. I would suspect that given its a DC motor that the fets that drive the motor fail from heat due to high switching currents and high engine temps. I wanted to take one apart in a relatives car but realized the electronics are probably potted or coated so its a moot point.

Volasko · 11-21-2012, 09:58 PM

Can't really tell what I am looking at... is that whats left of the bearing??

bobchuong58 · 03-06-2013, 07:04 PM

Quote:

Originally Posted by sibhusky

Good job, You can obviously see the DC motor and its stator windings inside which look in great shape. I would suspect that given its a DC motor that the fets that drive the motor fail from heat due to high switching currents and high engine temps. I wanted to take one apart in a relatives car but realized the electronics are probably potted or coated so its a moot point.

** If we can find out what kind of Fets drive the motor, it would be a big saving.

GoRomeo · 03-06-2013, 07:15 PM

Cool info. So I wonder if this proves that drivers that rev at high rmps the less life you will have with your water pump? Higher rpms the more heat leading to early failure... maybe?

GoRomeo · 03-06-2013, 07:17 PM

Quote:

Originally Posted by Bavarian Tech

Early production e90, concern of overheating issue...ended up needing a new water pump. Was a slow day @ work,figured why not take it apart

Whats ur production date on your 330i? I believe mine is Jul 05

11-19-2012, 07:59 PM	#1
Bavarian Tech Major 277 Rep 1,210 Posts Drives: 335i Join Date: Jan 2007 Location: Pittsburgh/Harrisburg iTrader: (15) Garage List 2006 330i [10.00]	Inside N52 Water Pump Early production e90, concern of overheating issue...ended up needing a new water pump. Was a slow day @ work,figured why not take it apart
	Appreciate 0 Tweet Quote

11-21-2012, 08:57 PM	#2
sibhusky Private 3 Rep 64 Posts Drives: 2011 E90 M3 Join Date: Jul 2012 Location: NoVa iTrader: (0)	Good job, You can obviously see the DC motor and its stator windings inside which look in great shape. I would suspect that given its a DC motor that the fets that drive the motor fail from heat due to high switching currents and high engine temps. I wanted to take one apart in a relatives car but realized the electronics are probably potted or coated so its a moot point.
	Appreciate 0 Quote

11-21-2012, 09:58 PM	#3
Volasko Colonel 732 Rep 2,612 Posts Drives: 06 330i E90, 18 530xe G30 Join Date: Dec 2010 Location: Toronto iTrader: (2) Garage List 2018 BMW 530e M Sport [9.00] 2006 BMW E90 330i [8.28]	Can't really tell what I am looking at... is that whats left of the bearing??
	Appreciate 0 Quote

03-06-2013, 07:15 PM	#5
GoRomeo Brigadier General 1399 Rep 4,310 Posts Drives: 330i, 135i Join Date: Feb 2006 Location: San Diego CA iTrader: (0) Garage List 2008 BMW 135i [6.33] 2006 330i [6.75]	Cool info. So I wonder if this proves that drivers that rev at high rmps the less life you will have with your water pump? Higher rpms the more heat leading to early failure... maybe?
	Appreciate 0 Quote