O-rings for SMG pump - BMW M5 Forum and M6 Forums
E60 M5 and E61 M5 Touring Discussion 2005- Advertiser's Forum

  • 3 Post By GregZ
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 3 Old 27th March 2019, 02:49 AM Thread Starter
Junior Member, warming up (<31 posts)
Join Date: Feb 2019
Posts: 11
Thanks: 0
Thanked 1 Time in 1 Post
O-rings for SMG pump

Hi All,

The following is without any guaranty, this has worked for me it may not work for you. Do it at your own risk.

I have refurbished my SMG pump (removed, cleaned, filed stamping on brushes - you can search for threads here on how to do this). For the reassembly one needs o-rings (preferably viton). I was unable to find size specs, so I measured and ordered them from oringsandmore.com (around $15 for a lot of o-rings as they come in packs of 5,10, sometimes 50). Make sure you scroll down on their web and get the Metric Viton/FKM Orings

Here are the sizes:
- 75.79x3.53mm (large for sealing container to pump body)
- 63x2mm (large for sealing motor against pump)
- 13x2.5mm (on container)
- 5x1.5mm (pump face small)
- 19x1.5mm (pump lip)
- 9.25x1.78mm (into container)

The metal band (clamp) on the container is 9mm wide. I got two stainless 9mm wide stainless hose clamps for $9 from ebay (Narrow Band 9mm Steel Hose Clamp 80-100mm Made in Germany Pack of 2 HC80-100/9)

I also got a liter of CHF 11S fluid on ebay for $15.

My container plug was cracked (which is $60 from BMW). I made another bolt; you can find the details here: https://www.m5board.com/vbulletin/e6...iner-plug.html (If you do this, be sure to use a viton o-ring around the bolt's head and be very-very careful on how much you tighten it).

While the relays were out, I opened them, cleaned them and carefully sanded the contacts to get rid of burn-ins (old school switch/relay refurbishing trick).

All-in-all $50 (and my o-ring collection grew). I hope to get another 50kmiles out of it. (And I also hope to win the lottery.)

I hope someone will find this useful.

2007 M6-E64

Last edited by GregZ; 27th March 2019 at 02:50 AM.
GregZ is offline  
The Following User Says Thank You to GregZ For This Useful Post:
Pav (27th March 2019)
Sponsored Links
post #2 of 3 Old 27th March 2019, 08:11 AM
m5board.comoholic (>1000 posts)
Join Date: Jan 2017
Location: IL
Posts: 1,137
Thanks: 4
Thanked 93 Times in 91 Posts
What??? No pics???

But yeah joking aside good info. Did you have the trans out or in the car? If out I would have added all the stuff from the top of the unit (gear position sensor, solenoid orings). Either way you were 2 screws away from replacing the clutch solenoid orings - made a nice shifting improvement on my car.
flacoramos is offline  
post #3 of 3 Old 27th March 2019, 08:12 AM
m5board.comoholic (>1000 posts)
Join Date: Jan 2017
Location: IL
Posts: 1,137
Thanks: 4
Thanked 93 Times in 91 Posts
Oh and the relay is (was) about $15. When sanding those contacts you take away some or all of the coating they have. You may have accelerated wear if that coating is gone.
flacoramos is offline  


Quick Reply

Register Now

In order to be able to post messages on the BMW M5 Forum and M6 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:

Similar Threads
Thread Thread Starter Forum Replies Last Post
Understanding the Motronic 1.2 ECU AseanAero E34 M5 Discussion 8 21st March 2018 03:20 AM
DIY: Rod bearing change ger E39 M5 and E52 Z8 Discussion 21 25th October 2017 03:03 AM
M5 E60 gearbox pump issues andygtt E60 M5 and E61 M5 Touring Discussion 0 2nd June 2015 12:39 PM
DIY: Modding Fuel Pump Assembly for the Aeromotive 11140 gzig5 E39 M5 and E52 Z8 Discussion 10 6th May 2015 05:58 AM
Intersting read on oil consumption jt2ma71 E39 M5 and E52 Z8 Discussion 7 18th August 2011 08:01 AM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome