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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Jun-27-2016, 04:31:12 PM   #21
B_Engineering
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Default Re: SMG Pump Motor Replacement On Car - DIY

I'm sorry - brush motor;-)

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Tks for reply. What means butst motor?


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Old Mon, Jun-27-2016, 04:33:45 PM   #22
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Default Re: SMG Pump Motor Replacement On Car - DIY

Understand. Is there any testing comparing durability between stock and update motor/viscosity?


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Old Mon, Jun-27-2016, 04:43:10 PM   #23
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Default Re: SMG Pump Motor Replacement On Car - DIY

For the new motor with new oil we perform different field tests (over years now).


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Understand. Is there any testing comparing durability between stock and update motor/viscosity?


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Old Mon, Jun-27-2016, 04:44:18 PM   #24
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Default Re: SMG Pump Motor Replacement On Car - DIY

Would be interested to know wear level compared with stock version.


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Old Mon, Jun-27-2016, 04:45:36 PM   #25
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Default Re: SMG Pump Motor Replacement On Car - DIY

Sorry for so many questions as I believe the change in viscosity is a good move. But as Engineer my background like to understand things in more details.


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Old Mon, Jun-27-2016, 05:01:04 PM   #26
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Default Re: SMG Pump Motor Replacement On Car - DIY

This is absolutely no problem.

Unfortunately we do not have a direct compare with the old one. We are cooperation with a partner from the automotive industry which is also a major supplier of OEM.

During our tests we have recognized that the hydraulic pump was not able any more to build up the system pressure in the predefined time frame (the smg control unit gives a time frame which is important to protect the electric motor - component protecting). First sign is the cog light - here the control unit has activated the protecting - pump is not activated any more for a few seconds. When you have a lot hydraulic consumers (clutch activating or gear shifting e.g.) the pressure can fall below 50 bar - this is a limit were the smg control unit likes to see the car / gearbox in a safe state - neutral. After analyzing several hydraulic pumps we found out, that a very important parameter in this system is the efficiency of the pump. When the oil has high temperatures you loss a lot of pressure (also without hydraulic consumers) and efficiency due to the low viscosity.

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Sorry for so many questions as I believe the change in viscosity is a good move. But as Engineer my background like to understand things in more details.


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Old Mon, Jun-27-2016, 07:53:49 PM   #27
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Default Re: SMG Pump Motor Replacement On Car - DIY

Do you provide warranty for your motors?

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This is absolutely no problem.

Unfortunately we do not have a direct compare with the old one. We are cooperation with a partner from the automotive industry which is also a major supplier of OEM.

During our tests we have recognized that the hydraulic pump was not able any more to build up the system pressure in the predefined time frame (the smg control unit gives a time frame which is important to protect the electric motor - component protecting). First sign is the cog light - here the control unit has activated the protecting - pump is not activated any more for a few seconds. When you have a lot hydraulic consumers (clutch activating or gear shifting e.g.) the pressure can fall below 50 bar - this is a limit were the smg control unit likes to see the car / gearbox in a safe state - neutral. After analyzing several hydraulic pumps we found out, that a very important parameter in this system is the efficiency of the pump. When the oil has high temperatures you loss a lot of pressure (also without hydraulic consumers) and efficiency due to the low viscosity.
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Old Mon, Jun-27-2016, 08:32:21 PM   #28
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Default Re: SMG Pump Motor Replacement On Car - DIY

our motors come with a 12 month warranty.

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Do you provide warranty for your motors?
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Old Mon, Jun-27-2016, 08:49:18 PM   #29
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Default Re: SMG Pump Motor Replacement On Car - DIY

Forgive me if my question is redundant or just a bad question. I am pretty ignorant to the Ins-and-outs of these DC motors and am trying to understand them better. Is there any reason that these motors remain to be brush motors, rather than upgrading to a brushless design? Is there any reason or negatives to this motor being smaller than the OE motor (will it be working harder and thus wear out quicker?) Once again, sorry if these are poorly formulated questions. I am sure they suggest my lack of knowledge about what is being discussed. However, I appreciate you (BE) making these rebuild kits available to us. Your website has been favorited and will receive my business in the event my SMG ever gives me issues. Your products are a life saver to us SMG guys.
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Old Mon, Jun-27-2016, 09:09:17 PM   #30
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Default Re: SMG Pump Motor Replacement On Car - DIY

I've replaced two Motors on cars of friends of mine.
They had no problems with this replacement motors from burkhart engineering.

I'm very happy with this german guy
Great service and nice person.
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Discussing SMG Pump Motor Replacement On Car - DIY in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)