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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > M Series > E46 M3 (2001-2006)

E46 M3 (2001-2006)

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  #1  
Old 12-17-2009, 11:18 AM
fergraz fergraz is offline
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Location: USA
 
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Mein Auto: 2002 M3 Cupe
SMG hydraulic pump turn on every 20 seconds

When my car is cool I put the switch on and the SMG hydraulic pump turn on every 2 minutes but when the car is hot the pump turn on every 20 secons. That is normal?
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  #2  
Old 01-08-2010, 02:22 PM
toddkageals toddkageals is offline
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Mein Auto: 2008 335i Sport/Premium/A
Quote:
Originally Posted by fergraz View Post
When my car is cool I put the switch on and the SMG hydraulic pump turn on every 2 minutes but when the car is hot the pump turn on every 20 secons. That is normal?
As far as it being normal, I can only say that my car does not do this. It certainly sounds like you could have a pressure accumulator that is leaking internally causing the pump to run more frequently to maintain pressure. The accumulator is available seperately so you might want to get this diagnosed before it kills the pump.
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  #3  
Old 01-23-2010, 06:28 PM
fergraz fergraz is offline
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Originally Posted by toddkageals View Post
As far as it being normal, I can only say that my car does not do this. It certainly sounds like you could have a pressure accumulator that is leaking internally causing the pump to run more frequently to maintain pressure. The accumulator is available seperately so you might want to get this diagnosed before it kills the pump.
Thanks
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  #4  
Old 04-01-2010, 01:00 PM
spittenZ4 spittenZ4 is offline
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Mein Auto: 2003 Z4 3.0i SMG
Did you out what the problem was? Cost of repair?

I am having a similar issue. :-/
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  #5  
Old 04-02-2010, 07:01 PM
fergraz fergraz is offline
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Originally Posted by spittenZ4 View Post
Did you out what the problem was? Cost of repair?

I am having a similar issue. :-/
Not, yet. I'm waiting for an appointment with the BMW dealer for a SMG software update recall. Then I will take it to a INDY for a GT1 diagnostic to decide if change the accumulator or the entire pump.
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