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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 Tue, Mar-31-2009, 08:19:32 AM   #11
darkcrash21
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subscribed... i'm going to have to do this to mine as well
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Old Tue, Mar-31-2009, 12:24:46 PM   #12
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The passenger side axle shaft has an allowed radial play of a mm. And I could have sworn the longer axle shaft is on the passenger side, because of this, and the shorter axle shaft goes in the driverside...

Here's a post of mine from a while ago straight from TIS (bmw na):

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Originally Posted by BMW NA
Further drivetrain checks reveal that the right side rear axle output flange appears to have "excessive" or more play (approximately 0.5mm to almost 1mm) when compared to the left side output flange. The radial play on the right side rear axle flange is a normal design characteristic of the new M differential lock style rear axle used on E46 M3 models.

Therefore an M3 differential should not be replaced due to a difference in play (when comparing left to right side differential output flange play) or "excessive" flange play since this will not eliminate a drivetrain rattle or knocking noise.
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Old Tue, Mar-31-2009, 01:08:46 PM   #13
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Quote:
Originally Posted by darkcrash21 View Post
subscribed... i'm going to have to do this to mine as well
Offtopic...Like the TT in your sig. I still miss mine
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Old Tue, Mar-31-2009, 09:24:55 PM   #14
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No luck yet guys.
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Old Tue, Mar-31-2009, 10:00:27 PM   #15
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I'm going to do it one more time and not push the seals in all the way. I think that the grooves created by the original seals are the problem and I need to move the seal outward about 1mm or so.

I'll check in with a result boys n girls.

Does BMW happen to make ring spacers or special seal for this situation?
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Old Tue, Mar-31-2009, 10:48:52 PM   #16
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After reading your post (#10) did you by any chance accidentally mix up the axle shafts?
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Old Tue, Mar-31-2009, 11:45:09 PM   #17
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Quote:
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After reading your post (#10) did you by any chance accidentally mix up the axle shafts?
No, that's impossible.
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Old Wed, Apr-01-2009, 05:21:14 AM   #18
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I did the seals last weekend and had the SAME problem. I put the first seal in (victor reinz), put everything back together, and it leaked WORSE. If you look at the spline, theres only a certain length of it that will touch the seal. Therefore, if you push the seals in too far, the spline wont make contact with the seal itself and will leak. You're on the right track - dont push them in nearly as far. I ended up pushing my seal in about 1/3 of the total distance I could push it in if I kept pounding. I'll try to post some pictures tomorrow showing exactly how far it needs to be pushed in. I pushed it in so the outside face of the seal was set in about 1/4" from the entrance of the "shaft" your pushing it into.

I redid them pushing it in the distance described above and it's dry as a bone 500 miles later. Long story short, dont push the seal in too far because it wont create the required contact with the spline shaft.
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Old Wed, Apr-01-2009, 12:50:03 PM   #19
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Here's a picture of my original seal below. Notice the depth it's set in. There is a gap between the inside face of the seal and the end of the shaft your pounding it into - it's not pressed all the way into the shaft, rather it only sits about a 1/4" in the shaft. The distance between the two white lines in the picture show this 1/4" (in fact i'd say its actually a bit less than 1/4"). Hope this helps!

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Old Wed, Apr-01-2009, 01:13:50 PM   #20
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Here's another picture showing where the seal makes contact with the spline shaft:
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Discussing Replaced Differential seals but ow they leak worse 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)