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Bevel box oil leak #612343
13/01/20 10:13 PM
13/01/20 10:13 PM
Joined: Jun 2012
Posts: 219
Derby
lord-richfield Offline OP
L - Learner Plates On
lord-richfield  Offline OP
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Joined: Jun 2012
Posts: 219
Derby
My M3W has an oil leak from the bevel box input shaft seal. Just wondering if this is a known issue, or if anyone else has had similar ? M3W has done 600 miles from new. I'll try to upload some photos to the Morgan Photo Gallery. Any insights gratefully received !


Richard

2019 M3W
Re: Bevel box oil leak [Re: lord-richfield] #612347
13/01/20 10:22 PM
13/01/20 10:22 PM
Joined: Sep 2010
Posts: 1,845
Wales
T
Taffmog Offline
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Taffmog  Offline
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T

Joined: Sep 2010
Posts: 1,845
Wales
Sorry can’t help but it shouldn’t leak !


1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8
Re: Bevel box oil leak [Re: Taffmog] #612349
13/01/20 10:36 PM
13/01/20 10:36 PM
Joined: Jun 2012
Posts: 219
Derby
lord-richfield Offline OP
L - Learner Plates On
lord-richfield  Offline OP
L - Learner Plates On

Joined: Jun 2012
Posts: 219
Derby
Thanks, that's what I was hoping for - the last thing I want to hear is 'they all do that', but wanted to check !


Richard

2019 M3W
Re: Bevel box oil leak [Re: lord-richfield] #612355
13/01/20 11:07 PM
13/01/20 11:07 PM
Joined: Jun 2012
Posts: 1,437
United Kingdom, Lincolnshire
planenut Offline
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planenut  Offline
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Joined: Jun 2012
Posts: 1,437
United Kingdom, Lincolnshire

This has happened to other M3W's but is not "normal" or acceptable. There should be 330 ml of oil in the bevel box, if it is overfilled this can cause leaks. If the input shaft seal needs replacing it can be done in situ, the big retaining nut is a LH thread and you will need to make a gag to hold the flange. Use a Viton seal with a higher temperature rate than the original failed one, size is 55x42x8mm R23 double lip but check dimensions as there are possibly two different sizes used. Mark the nut in relation to the shaft so you can refit to the same position and preload. It all worked well when I did it. Use some silicone sealant on the splines on assembly.

[Linked Image]

Re: Bevel box oil leak [Re: lord-richfield] #612357
13/01/20 11:15 PM
13/01/20 11:15 PM
Joined: Aug 2013
Posts: 1,382
Cheshire, UK
nippymog Offline
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Posts: 1,382
Cheshire, UK
Happened to mine three times, twice under warranty then out of warranty when had a new oil seal fitted.
I dont overfill the box.
On this basis, I am expecting it to happen again - any chance of a detailed write up for the Bulletin please Ian?

Re: Bevel box oil leak [Re: lord-richfield] #612358
13/01/20 11:17 PM
13/01/20 11:17 PM
Joined: Feb 2019
Posts: 2,496
Port Orchard, WA.
LightSpeed Offline
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LightSpeed  Offline
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Posts: 2,496
Port Orchard, WA.
Mine has no leaks at 1750 miles.


Stephen
2019 M3W piling on the Covid miles

Re: Bevel box oil leak [Re: lord-richfield] #612364
14/01/20 06:22 AM
14/01/20 06:22 AM
Joined: Aug 2012
Posts: 2,029
atalante83 Offline
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atalante83  Offline
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Joined: Aug 2012
Posts: 2,029
40000 miles without leak.

Re: Bevel box oil leak [Re: lord-richfield] #612371
14/01/20 07:38 AM
14/01/20 07:38 AM
Joined: Mar 2014
Posts: 1,101
Leicestershire, UK
Bunny Offline
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Bunny  Offline
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Joined: Mar 2014
Posts: 1,101
Leicestershire, UK
No jaw marks on the input shaft then Planenut? innocent


Andy
Re: Bevel box oil leak [Re: Bunny] #612398
14/01/20 11:29 AM
14/01/20 11:29 AM
Joined: Jun 2012
Posts: 1,437
United Kingdom, Lincolnshire
planenut Offline
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planenut  Offline
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Joined: Jun 2012
Posts: 1,437
United Kingdom, Lincolnshire

Only top quality engineering here laugh2. I will give it a go Nippy.

Re: Bevel box oil leak [Re: lord-richfield] #612480
14/01/20 09:37 PM
14/01/20 09:37 PM
Joined: Jun 2012
Posts: 219
Derby
lord-richfield Offline OP
L - Learner Plates On
lord-richfield  Offline OP
L - Learner Plates On

Joined: Jun 2012
Posts: 219
Derby
Thanks for the info everyone, awaiting dealer response now.


Richard

2019 M3W
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