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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Inside N52 Water Pump



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      11-19-2012, 08:59 PM   #1
Bavarian Tech
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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











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      11-21-2012, 09:57 PM   #2
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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.
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      11-21-2012, 10:58 PM   #3
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Can't really tell what I am looking at... is that whats left of the bearing??
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      03-06-2013, 08:04 PM   #4
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E90 Water pump electronics

Quote:
Originally Posted by sibhusky View Post
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.
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      03-06-2013, 08:15 PM   #5
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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?
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      03-06-2013, 08:17 PM   #6
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Quote:
Originally Posted by Bavarian Tech View Post
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
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