BMW M3 Forum
BMW M3 Forum BMW M3 Gallery BMW M3 Reviews BMW M3 Social Groups BMW M3 Chat M3Forum Sponsors >>
Loading


Mobile M3forum
Go Back   BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X) > BMW M3 Discussions > E46 M3 (2001-2006)
Tire Rack Buy Winter Tires Now!
Not a member? Register Now!
Register Gallery All Albums Garage Search Today's Posts Mark Forums Read Calendar FAQ

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.


Reply
 
Thread Tools Display Modes
Old Thu, Oct-06-2016, 11:26:04 PM   #1
Dr M3an M3
Why does everyone think my name is Dan? lol
 
Dr M3an M3's Avatar
 
Join Date: Mar 2016
Posts: 1,524
In the garage:
Reputation: 0 Dr M3an M3 is on a distinguished road
Location: Columbia, SC

United States




Default SMG Accumulator Pressure Test: 28.9 Bar-Recondition Accumulator Seals vs New Accum.?

Decided to test the SMG Accumulator pressure today using DIS. The test came back with a pressure of 28.9bar ( Less than 29 bar = recommended to replace the accumulator). Other than the occasional cog light during hot days in prolonged traffic, I have not had any issues with the SMG nor neutral drops. I was not expecting the accumulator pressure test to fail. I did not have the battery plugged into a battery tender while performing the test (I had between 12-11volts as per DIS when conducting the test) and the car was tested cold, meaning I had not driven it for the day. I plan to retest later tonight, after I drive it for a bit to see if this makes a difference.

That being said, what in the accumulator fails, in regards to failing the pressure test? I would assume it would be some sort of internal rubber seals? Is there a way to replace these seals and recondition my current used accumulator, or am I just going to need to purchase a whole new accumulator from ECS or Burkhart? I am hoping that it could be as simple as replacing the old seals with fresh ones, but am not going to hold my breath that this is the case. I plan to replace the electric motor, fluid, and temp sensor with the Burkhart kit in the next few months, during winter.

I have searched, and there are hundreds of pages so I was hoping to get some replies on this from guys that have replaced or rebuilt their SMG Accumulators, without having to resift through all the threads and pages for a second time. I thought I remembered reading somewhere that these accumulators could be reconditioned with new seals. If so, can some one link me the part numbers for this or where to find them and a DIY? Google searching this forum is not turning up what I am looking for.

Thanks in advance!
__________________
2004 E46 ///M3 - Oxford Green Metallic II + Cinnamon SMG
IG: DrM3anM3

Mods: Maintenance, WPC treated rod-bearings, VinceBar (weld) + Redish Plates, Full Beisan VANOS 'lockdown', Supersprint V1 Stepped headers w/ Oversized Section 1, RE El Diablo Muffler , BBS LMs w/ PSS, Streamline CSL Bumper, CSL style CF diffuser, Vorsteiner CF CSL Bootlid, KW V3 Coilovers, Angel-eyes, CSL SMG Engine DME tune, CSL '255' SMG DME tune, CSL Dynamic Redline Warmup Light parameters.
Upcoming Group-Buys (PM if Interested): OE CSL Bootlids, CSL Bumper, OE CSL Wheels, Supersprint Headers MEGA thread, CSL Airbox...others in the works.
Please PM me - In search of:
-- Street DD friendly Camber Plates compatible with KW V3 Coilovers
-- Wanting to Trade basically brand new Eagle Eye Smoked Reverse Trunk Lights for a pair that are Non-smoked
Jump to top Dr M3an M3 is offline   Reply With Quote
Sponsored Links
Register now and remove these ads
Old Fri, Oct-07-2016, 03:15:48 AM   #2
Dr M3an M3
Why does everyone think my name is Dan? lol
 
Dr M3an M3's Avatar
 
Join Date: Mar 2016
Posts: 1,524
In the garage:
Reputation: 0 Dr M3an M3 is on a distinguished road
Location: Columbia, SC

United States




Default Re: SMG Accumulator Pressure Test: 28.9 Bar-Recondition Accumulator Seals vs New Accu

Update: After an hour of city driving, I got home and retested the accumulator pressure. The first attempt would not allow the test to proceed as the hydraulic temperature was 65 degrees, and the testing range requires it to be between 20-60 degrees. So, I let it cool down and tried again. This time, the accumulator pressure test passed with a measurement of 29.1 bar and I was met with a friendlier message that "The pressure accumulator is OK!"...

I was hoping the pressure would be higher, but I am glad that it at least passed compared to the cold test. I guess that buys me a little time comparatively, before It needs to be swapped out. A 0.2 bar difference (28.9 vs 29.1) is only the difference of 2.9psi, so I suppose thats not fantastic nor really a statistically relevant difference, especially considering the very wide range of acceptable values (29bar - 41bar, or 420.6psi - 594.7psi). I am really happy I spent the 35 bucks on DIS. I can at least monitor this progressively to see how things change over the next few weeks, hopefully they do not change to any considerable amount.
__________________
2004 E46 ///M3 - Oxford Green Metallic II + Cinnamon SMG
IG: DrM3anM3

Mods: Maintenance, WPC treated rod-bearings, VinceBar (weld) + Redish Plates, Full Beisan VANOS 'lockdown', Supersprint V1 Stepped headers w/ Oversized Section 1, RE El Diablo Muffler , BBS LMs w/ PSS, Streamline CSL Bumper, CSL style CF diffuser, Vorsteiner CF CSL Bootlid, KW V3 Coilovers, Angel-eyes, CSL SMG Engine DME tune, CSL '255' SMG DME tune, CSL Dynamic Redline Warmup Light parameters.
Upcoming Group-Buys (PM if Interested): OE CSL Bootlids, CSL Bumper, OE CSL Wheels, Supersprint Headers MEGA thread, CSL Airbox...others in the works.
Please PM me - In search of:
-- Street DD friendly Camber Plates compatible with KW V3 Coilovers
-- Wanting to Trade basically brand new Eagle Eye Smoked Reverse Trunk Lights for a pair that are Non-smoked
Jump to top Dr M3an M3 is offline   Reply With Quote
Old Fri, Oct-07-2016, 04:10:07 PM   #3
Dr M3an M3
Why does everyone think my name is Dan? lol
 
Dr M3an M3's Avatar
 
Join Date: Mar 2016
Posts: 1,524
In the garage:
Reputation: 0 Dr M3an M3 is on a distinguished road
Location: Columbia, SC

United States




Default Re: SMG Accumulator Pressure Test: 28.9 Bar-Recondition Accumulator Seals vs New Accu

Nobody has information about reconditioning the accumulator?
__________________
2004 E46 ///M3 - Oxford Green Metallic II + Cinnamon SMG
IG: DrM3anM3

Mods: Maintenance, WPC treated rod-bearings, VinceBar (weld) + Redish Plates, Full Beisan VANOS 'lockdown', Supersprint V1 Stepped headers w/ Oversized Section 1, RE El Diablo Muffler , BBS LMs w/ PSS, Streamline CSL Bumper, CSL style CF diffuser, Vorsteiner CF CSL Bootlid, KW V3 Coilovers, Angel-eyes, CSL SMG Engine DME tune, CSL '255' SMG DME tune, CSL Dynamic Redline Warmup Light parameters.
Upcoming Group-Buys (PM if Interested): OE CSL Bootlids, CSL Bumper, OE CSL Wheels, Supersprint Headers MEGA thread, CSL Airbox...others in the works.
Please PM me - In search of:
-- Street DD friendly Camber Plates compatible with KW V3 Coilovers
-- Wanting to Trade basically brand new Eagle Eye Smoked Reverse Trunk Lights for a pair that are Non-smoked
Jump to top Dr M3an M3 is offline   Reply With Quote
Old Sun, Mar-19-2017, 08:45:49 PM   #4
E46 Mystic M3
Registered User
 
Join Date: Jun 2014
Posts: 353
In the garage:
Reputation: 0 E46 Mystic M3 is on a distinguished road
Location: San Diego

United States




Default Re: SMG Accumulator Pressure Test: 28.9 Bar-Recondition Accumulator Seals vs New Accu

Old thread but you should start by changing out the smg fluid. You cant do it all at once unless you remove your hydraulic lines, but you can do it bit by bit from the smg reservoir. Then test the accumulator pressure after you change the fluid. For reference, my SMG with 65k miles had 33.9 bar COLD. Hope this helps!
__________________
2004 M3 Coupe SMG Mystic Blue
2004 M3 Coupe 6MT Laguna Seca Blue
1997 Toyota 4Runner (Daily)
2014 228i Jet Black
2002 745i Sterling Grey SOLD, gone and not missed
Jump to top E46 Mystic M3 is offline   Reply With Quote
Old Sun, Mar-19-2017, 09:17:29 PM   #5
icecream
Registered Apples
 
icecream's Avatar
 
Join Date: Aug 2012
Age: 13
Posts: 1,972
In the garage:
Reputation: 0 icecream is on a distinguished road
Location: PNW

United States




Default Re: SMG Accumulator Pressure Test: 28.9 Bar-Recondition Accumulator Seals vs New Accu

I don't think it would be serviceable for a DIY. I don't know much about accumulators but I think ours is a nitrogen charged bladder type. The bladder, nitrogen and seals do not look serviceable but I haven't looked closely at the device. I can take a look at mine later since it is sitting on my work bench.
A specialist may be able to recharge it. I suppose after ten to fifteen years it is possible some nitrogen has leaked affecting its efficiency. It is only $500 for a new one but if charging it is only $50, might be worth it. They may also be able to fit a new bladder for a lot less than a new accumulator but I am willing to bet they wouldn't just happen to have the right size bladder sitting around. When I have time I may reach out to these guys and see what they say:
http://www.qualityhydraulics.com/blo...tors-nitrogen/

Last edited by icecream; Sun, Mar-19-2017 at 09:26:37 PM.
Jump to top icecream is online now   Reply With Quote
Old Sun, Mar-19-2017, 09:57:48 PM   #6
Dr M3an M3
Why does everyone think my name is Dan? lol
 
Dr M3an M3's Avatar
 
Join Date: Mar 2016
Posts: 1,524
In the garage:
Reputation: 0 Dr M3an M3 is on a distinguished road
Location: Columbia, SC

United States




Default Re: SMG Accumulator Pressure Test: 28.9 Bar-Recondition Accumulator Seals vs New Accu

Old thread, so to update this, I was able to find a perfectly working and conditioned Accumulator that was pulled from a car that swapped to a 6 speed. Best of yet, I got that accumulator, among other parts for $40 shipped!! So I won't be reconditioning my old accumulator when I decide to recondition the system. Additionally, my accumulator pressure and SMG pump has worked flawlessly since making this thread. Last I checked, the pressure is within normal limits and holds well. I have not had a single issue or cog light since around the time of making this thread. I am sure when temps begin to reach 98 degrees outside, the cog light will return. When that happens, I will make time to replace the electric motor, temp sensor, fluid, and accumulator. The plan will be to move the entire unit to the drug bin. I will just need to find time to conduct all of this, when the issue decides to return.

Thanks for the input though.

Also, Icecream, if you happen to contact the people in the link you provided, I'd be interested to see what you find for the sake of science and curiosity.

Cheers.
__________________
2004 E46 ///M3 - Oxford Green Metallic II + Cinnamon SMG
IG: DrM3anM3

Mods: Maintenance, WPC treated rod-bearings, VinceBar (weld) + Redish Plates, Full Beisan VANOS 'lockdown', Supersprint V1 Stepped headers w/ Oversized Section 1, RE El Diablo Muffler , BBS LMs w/ PSS, Streamline CSL Bumper, CSL style CF diffuser, Vorsteiner CF CSL Bootlid, KW V3 Coilovers, Angel-eyes, CSL SMG Engine DME tune, CSL '255' SMG DME tune, CSL Dynamic Redline Warmup Light parameters.
Upcoming Group-Buys (PM if Interested): OE CSL Bootlids, CSL Bumper, OE CSL Wheels, Supersprint Headers MEGA thread, CSL Airbox...others in the works.
Please PM me - In search of:
-- Street DD friendly Camber Plates compatible with KW V3 Coilovers
-- Wanting to Trade basically brand new Eagle Eye Smoked Reverse Trunk Lights for a pair that are Non-smoked
Jump to top Dr M3an M3 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 06:19:19 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
M3Forum.com and M3forum.net is in no way sponsored, endorsed or affiliated by or with BMW NA / BMW AG or any of it's subsidiaries or vendors.
BMW and M3 (E90 M3 | E92 M3 | E93 M3 | E46 M3 | E36 M3 | E30 M3) are registered trademarks of BMW AG.
M3Forum Terms of Service
Copyright 1999-2017 M3Forum.com
Discussing SMG Accumulator Pressure Test: 28.9 Bar-Recondition Accumulator Seals vs New Accum.? 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)