Results 1 to 6 of 6

Thread: 2008 R1200GS Final drive oil leak

  1. #1
    Registered User
    Join Date
    Feb 2015
    Location
    Odessa, FL
    Posts
    2

    2008 R1200GS Final drive oil leak

    Firstly, apologies for the length of this post. As the name of the thread suggests, I’m looking for some advice on what might be going on with the final drive on my ’08 R1200GS, which has only 30k miles on it.

    This started with what, to me, looked like evidence of a very slow leak from the outer (right hand) final drive seal. The evidence was the usual tell-tale black gunk that collects when oil and dirt mix and it was on the underside of the final drive housing, from the seal down. I did some online searching and found indication that failure of this seal can be caused by not riding the bike for some time. This seems a plausible explanation since the bike was garaged for about 4 – 5 months late last year. It was only in December that I managed to put some miles on it and then noticed the slight leak.

    Anyway, I took it in to the local dealer who, without really looking at it, confirmed that they would replace the outer seal only. They did this last weekend and that’s when the real trouble started. I went to collect the bike and they hadn’t quite finished up so had to wait. While waiting I saw a technician take the bike out, I assume for a test ride which lasted no more that 5 minutes. They said the bike was OK and I paid up ($120 all in) and headed home – which is only ¾ mile away. On arrival at home, I checked the final drive and there was oil dripping from the bottom of the housing (not the new seal) and seemed to be coming from between the brake disc and the housing itself. The oil had clearly sprayed on both the tire and the rim. See the pictures (sorry but couldn't get the the right way up!).

    174241s.jpg174248s.jpg

    I immediately returned the bike to the dealer who, because of the late hour said they would look into it the next week. Now, after having had the bike for a week they are telling me that the “large O-ring” has failed and needs replacing. I am assuming that the O-ring is the one in the following picture (courtesy gtrider_texas from a different thread).

    FC5B5AF9-A3B4-4644-B7C1-DC92A4417FA4 (2).jpg

    So my questions are:
    1. On the first seal replacement is there any need to pull the final drive apart and disturb the O-ring?
    2. If there was no reason to disturb this O-ring, what is the likelihood of this failing at the same time as the other seal? Could it have also “dried out” due to lack of riding? This doesn’t seem likely to me.
    3. If the final drive had been over-filled with oil after the first seal replacement, could that have blown out the O-ring?
    4. How difficult is it to over-fill the final drive?
    5. Has anyone experienced a failure of this O-ring while riding? It seems to me that this would be very dangerous given the volume and rate that the oil was coming out and ending up all over the side of the tire. Not to mention the likelihood of severe damage to the final drive as it ran dry.


    Thanks in advance for any help.

    Murray.

  2. #2
    Lost again Texpaul's Avatar
    Join Date
    Oct 2006
    Location
    San Antonio, Tx
    Posts
    628
    I have a 2005 GS so very similar to yours.
    You can replace the outer seal without disassembling the entire drive. You can also do it without disturbing the final drive oil, but don't know if that's how your dealer did it.
    You don't state your mileage but if not ridden often the oil ring could fail, especially if the final drive oil was changed. It can be VERY easy to overfill the final drive but wouldn't expect that at a dealership. However, note that the oil level in the final drives was deceased as a way to address seal issues so maybe somebody used the old level???
    I would also note that, though the picture is not that clear, you appear to have a cracked rotor carrier, though I can't see it clear enough to be certain.
    Paul Mulhern
    MOA# 56330
    The biggest mistake people make... is thinking they have time.

  3. #3
    ... cracked rotor carrier - there was a recall for that a few years ago. Went from aluminum to steel.
    2007 R1200RT

  4. #4
    Registered User jandhumphreyme's Avatar
    Join Date
    Sep 2013
    Location
    Central Maine
    Posts
    476
    No there is no need to disturb the O-Ring when replacing the right hand shaft seal.

    My $.02 it is NOT the O-Ring in your picture, there is an O-ring just outside of the the left side shaft seal. To get at that you will most likely have to break open the final drive case, I've not done one. My 2011 is built slightly different, it will weep a bit in the spring but not so bad yet that I'm wanting to dig into it. You will have to remove the wheel flange to get a good look at it to determine course of action.

    I concur with TexPaul, it looks like the wheel flange is cracked.

    Good luck, couple of Youtube video's out there showing how to take apart the gear case, not extremely difficult if you patient and think through your steps. Simple tools needed as well. Please report back on what you want to do, pictures too.
    So often times it happens that we live our lives in chains
    And we never even know we have the key

  5. #5
    Registered User
    Join Date
    Feb 2015
    Location
    Odessa, FL
    Posts
    2
    Thanks to all for the replies. Regarding the oil leak, my understanding is that a "seal" or oil ring provides a seal between parts that move relative to each other, while something like an O-ring or gasket provides a seal between parts that are stationary relative to each other. I have a hard time understanding how an O-ring would "dry out", either due to time alone or under-utilization. Instead, in my experience, O-rings fail because of bad installation (trapped) or excessive fluid pressure. I guess it just seems too coincidental to me that I take it in to have the outer seal replaced and then some other seal/O-ring fails catastrophically. With respect to which O-ring it is, I'm afraid I'm only going by what I'm being told by the dealer and I don't know what they mean by the "large O-ring". They still have the bike - waiting for the part. It's only been 9 days now!! I will report back on what they do and what their final verdict is on the cause of the leak.

    Regarding the crack in the rotor flange, please can you somehow indicate where/what you are seeing on the photos. Please also note that the photos of the inside of the final drive that show the O-ring are not of my bike (they are reproduced courtesy of gtrider_texas from a different post).

    Murray.

  6. #6
    Registered User jandhumphreyme's Avatar
    Join Date
    Sep 2013
    Location
    Central Maine
    Posts
    476
    Murray,
    Looking at the photo's up close, I was mistaken, what looks like a crack is merely a seam.

    Good luck with your repair, please do report back what the final resolution is and cost.
    So often times it happens that we live our lives in chains
    And we never even know we have the key

Similar Threads

  1. final drive leak
    By parni in forum Oilheads
    Replies: 13
    Last Post: 06-08-2010, 09:45 PM
  2. final drive leak
    By dmcbmw356mcn in forum Airheads
    Replies: 2
    Last Post: 07-18-2007, 02:02 AM
  3. Final Drive Leak
    By mikea in forum Airheads
    Replies: 3
    Last Post: 08-10-2004, 09:31 PM
  4. Final Drive Leak
    By mikea in forum Oilheads
    Replies: 0
    Last Post: 08-09-2004, 04:27 PM
  5. Final Drive oil leak
    By DZIMBRIC in forum Oilheads
    Replies: 8
    Last Post: 07-27-2004, 12:36 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •