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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 Sat, Oct-16-2010, 03:40:16 AM   #11
Mr. Wolfe
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Originally Posted by quaixe View Post
is it the pinon seal ?
Don't know, threw it on the rack and snapped some pictures. Followed that up with a full rocks glass of Blue Label.

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Originally Posted by M3_Modness View Post
Damn that looks bad! Are you going to pull it?
Yup. I just have to order the parts and find the time. I love my car so much that I can't sell it, but they can definitely wear you out. (mentally) Nothing serious has ever happened to my car so I am still keeping my fingers crossed. This is just a new world to me coming from mostly Japanese cars. You could never get the smiles or the thrills that the M provides, but damn, I barely worked on it either. Luckily, I enjoy wrenching... it's just more fun whenever you are enhancing the car and not just fixing a broken part.

This isn't a big deal to me, but geez..... 46k miles.

Mr. Wolfe
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Old Sat, Oct-16-2010, 03:41:08 AM   #12
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Originally Posted by tjpatte View Post
That is pretty bad. Might want to make sure the housing vent isn't plugged. If it gets plugged the housing will pressurize while driving and force fluid past the seals.

Tom
Where is this vent? I have not dug into this AT ALL.

Mr. Wolfe
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Old Sat, Oct-16-2010, 03:41:28 AM   #13
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There is an actual seal that is pressed into where the axle spline enters the diff.

Mr. Wolfe
Did it show any signs of leaking before? Like the minor leak most people have.
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Old Sat, Oct-16-2010, 03:48:14 AM   #14
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Did it show any signs of leaking before? Like the minor leak most people have.
Nope, not that I am aware of. I could smell this immediately, but like I said, I have not had this on my lift for a while.

There was no warning, just a strong smell and some fluid on the exhaust tips and inside barrel of the driver side wheel.

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Old Sat, Oct-16-2010, 03:52:47 AM   #15
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Nope, not that I am aware of. I could smell this immediately, but like I said, I have not had this on my lift for a while.

There was no warning, just a strong smell and some fluid on the exhaust tips and inside barrel of the driver side wheel.

Mr. Wolfe
Oh ok good luck with fixing it and thanks for the info.
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Old Sat, Oct-16-2010, 04:39:55 AM   #16
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Where is this vent? I have not dug into this AT ALL.

Mr. Wolfe
It's in the middle of the back of the diff (side to side) and about 3/4 of ways up from the bottom. It's a small hole drilled into the aluminum cover. I happened to find it last week when I pulled the dif and leaned it back and some oil came out..

Tom
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Old Sun, Oct-17-2010, 02:48:03 PM   #17
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Bump, just for exposure. I would like to know how many people have had this problem.

Mr. Wolfe
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Old Sun, Oct-17-2010, 03:09:23 PM   #18
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Wolfe, I had my diff seals replaced thru my CPO at the dealer. The car was actually up on the lift for an unrelated reason and they saw a small seepage and decided to just change out the seals for me. $50 deductable later and I was on my way. Here was my thread http://www.m3forum.net/m3forum/showthread.php?t=292709 ... Yours does look worse so definitely dont wait on it as you dont want to do any real damage to your differential.... Good luck man and keep us posted...
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Old Sun, Oct-17-2010, 03:35:17 PM   #19
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Bump, just for exposure. I would like to know how many people have had this problem.

Mr. Wolfe

I'm having this problem right now... and it will be my SECOND pinion seal!
The first one I replaced last month... but apparently I've either got a plugged vent or I did not seat the pinion nut properly cause its leaking again.

Yippy!
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Old Sun, Oct-17-2010, 03:38:57 PM   #20
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Originally Posted by tjpatte View Post
It's in the middle of the back of the diff (side to side) and about 3/4 of ways up from the bottom. It's a small hole drilled into the aluminum cover. I happened to find it last week when I pulled the dif and leaned it back and some oil came out..

Tom

The rear diff cover correct?
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Urethane RTAB's/FCAB's/RSM's
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CDV delete
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THIS CAR IS NOW FOR SALE!
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Discussing Differential Seal Leak (with pictures) 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)