Parts Catalog Accessories Catalog Tech Info Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
BMW Output Shaft Seal Replacement
 
Bookmark and Share

Pelican Technical Article:

BMW Output Shaft Seal Replacement

Nick Czerula

Time:

7 hours7 hrs

Talent:

*****

Tools:

18mm socket and wrench, flathead screwdriver, E12, 30mm socket, seal puller, 3-jaw puller

Applicable Models:

BMW 325i Sedan (2006)
BMW 325xi Sedan/Wagon (2006)
BMW 328i xDrive Coupe (2009-13)
BMW 328i xDrive Sedan (2009-11)
BMW 328i xDrive Wagon (2009-12)
BMW 328i/xi Coupe (2007-13)
BMW 328i/xi Sedan (2007-11)
BMW 328i/xi Wagon (2007-12)
BMW 330i/xi Sedan (2006)
BMW 335d/i/xi Sedan (2007-11)
BMW 335i xDrive Coupe (2009-13)
BMW 335i xDrive Sedan (2009-11)
BMW 335i/is/xi Coupe (2007-13)

Parts Required:

Manual transmission fluid, output shaft seal.

Hot Tip:

Warm transmission for 3 miles before beginning

Performance Gain:

Remedy a fluid leak

Complementary Modification:

Replace manual transmission fluid

The driveshaft output shaft seal can leak over time as the sealing lip wears. You may notice a leak toward the rear of your transmission, be sure to check the shift selector shaft seal as well. See our tech article on manual transmission selector shaft seal replacing. When looking for the source of an oil leak, always look for fresh clean oil, this will direct you to the problem area. If you see dirt gathered around the out put shaft seal and a clean oily area, this indicates a leak at the seal. I would suggest replacing your transmission fluid when you replace this seal.

In this article, I'll go over the steps involved with replacing the driveshaft output shaft seal on BMW E90 models with a manual transmission.

Jack up your vehicle and support using jack stands. See our tech article on jacking up your vehicle.

Remove transmission splash shields. See our tech article on engine splash shields removing.

Working at transmission where driveshaft connects, remove three18mm driveshaft flex-disc fasteners.
Figure 1

Working at transmission where driveshaft connects, remove three18mm driveshaft flex-disc fasteners. (green arrows) Using a prybar or large flathead screwdriver, lever driveshaft away from transmission. Support driveshaft using rope or mechanic's wire. You won't need much force to do this. If it won't move, you may have left a bolt in place. If you want to replace the flex-disc, now would be a good time to remove it. Remove the other three 18mm bolts from the flex-disc, then remove the flex-disc from the driveshaft, Remove the complete exhaust system from your vehicle. See our tech article on exhaust system replacing.

Next you will have to remove the exhaust heat shields.
Figure 2

Next you will have to remove the exhaust heat shields. Start by removing the front one. Remove one 13mm fastener (blue arrow). Then remove two 10mm fasteners (green arrows) and two 6mm fasteners (yellow arrows).

Then pull the heat shield down and remove from vehicle.
Figure 3

Then pull the heat shield down and remove from vehicle.

Working at the rear heat shield, remove three 10mm fasteners (green arrows).
Figure 4

Working at the rear heat shield, remove three 10mm fasteners (green arrows).

Then remove the rear heat shield from the vehicle.
Figure 5

Then remove the rear heat shield from the vehicle.

Working at the rear of the driveshaft, remove four E12 driveshaft bolts.
Figure 6

Working at the rear of the driveshaft, remove four E12 driveshaft bolts. (green arrows)

Next you have to remove the two 13mm center bearing fasteners.
Figure 7

Next you have to remove the two 13mm center bearing fasteners. (green arrow). Be sure to support the driveshaft when remove the center bearing fasteners so it does not fall. After removing the center bearing fasteners, remove the drive shaft from the vehicle. Once the driveshaft is removed, clean the transmission thoroughly.

Now you can remove the 30mm nut holding the driveshaft flange to the output shaft.
Figure 8

Now you can remove the 30mm nut holding the driveshaft flange to the output shaft. (green arrow)

I like to use a 3-jaw puller to remove the flange from the transmission.
Figure 9

I like to use a 3-jaw puller to remove the flange from the transmission. Install puller and tighten until flange is free.

Then slide flange off transmission output shaft.
Figure 10

Then slide flange off transmission output shaft.

Now it is time to remove the seal.
Figure 11

Now it is time to remove the seal. I use a seal puller and slowly lever the seal out. You have to stick the puller into seal, then lever it out. Now be careful not to damage the transmission housing and work gently and slowly. (green arrow)

To install new seal, slide it over the output shaft and press it in by hand.
Figure 12

To install new seal, slide it over the output shaft and press it in by hand. Then slowly install the seal until it is flush with transmission housing. You can tap it in using a rubber mallet. Be careful not to bend the seal or seal lip. Install flange onto output shaft. Then install the flange nut, use Loctite 243 on threads of the nut. Install drive shaft to transmission, see our tech article on driveshaft installing for more info. Reinstall exhaust heat shield and exhaust.

Bookmark and Share
Comments and Suggestions:
patrick Comments: my 2007 328xi e91 does not have a 30mm nut on the output shaft -your figure 8- just a clip. Do I need to remove the clip or just pull the output shaft? Also my output shaft is flush with the transfer case, unlike yours. So how do I pull the output shaft on my transfer case to get to the seal? I need to pull part #4 in this image in order to replace part #3 -the seal- http://www.e90post.com/forums/attachment.php?attachmentid=394643&stc=1&d=1275921304
January 29, 2016
  Followup from the Pelican Staff: Remove the snap ring, then you can pull the end off. - Nick at Pelican Parts  

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Privacy Statement]
 [Contact Us] [About Us] [Shipping] [Map to our Location] [Careers]

Copyright © Pelican Parts Inc.

Page last updated: Wed 12/7/2016 02:23:18 AM