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Old 01-01-2014, 05:46 PM   #1
apex0i OP
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Oil seepage at right engine case

Ok so i have a 2011 F800GS...recently i noticed a seepage of what seems to be engine oil out of a small hole right below the waterpump.

Can anybody tell me what this is all about. From what i can tell its not a busted waterpump seal.

Thanks in advance guys...



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Old 01-01-2014, 06:11 PM   #2
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Yep my 2012 just started leaking.
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Old 01-01-2014, 06:17 PM   #3
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Any idea what's wrong or how to fix it?

I can sometimes smell the engine oil vaporise as the engine heats up when riding, just irritating more than anything really but still a bit worrying.

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Old 01-01-2014, 06:38 PM   #4
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Originally Posted by apex0i View Post
Any idea what's wrong or how to fix it?

I can sometimes smell the engine oil vaporise as the engine heats up when riding, just irritating more than anything really but still a bit worrying.

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My water pump was replaced for that same issue. Seems they're a couple O-rings that don't seal good.

Still under warranty?
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Old 01-01-2014, 06:53 PM   #5
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Oh my..a whole water pump?? Warranty longggg gone...

But what bugs me is that it isnt coolant, its oil. Hmmmmm!

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Old 01-01-2014, 07:17 PM   #6
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There are a few threads here dealing with this.

Oil or coolant can leak from this hole. Might just need 2 new o rings but may require a new pump assembly. It will not suddenly fail. Monitor it. It will either stay the same, get worse or just stop. If not under warranty then see what happens. On our NA trip last Sept hers started leaking but after another 1k miles it stopped.

It's a dynamic seal with oil on one side and coolant on the other and the seep hole is in no mans land.
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Old 01-02-2014, 06:02 AM   #7
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Here's a longer thread:

http://f800riders.org/forum/showthre...ght=water+pump

The water pump has been redesigned twice since the 2009 production year ...

I know that because I've had one of each of the three styles ...

The first design used metal drive gears, a pair of o-rings and maybe other stuff for sealing and was a simple bushing design.

The second design had some changed to the sealing and relocated the weep hole but was still bushing type design ... (pictures in the other thread somewhere).

Somewhere in 2010 timeframe BMW switched to plastic gears to quiet things down, so the 2nd style pump came with both a plastic and a metal gear in the kit so that you could match the material type on the mating gear (which is on the end of the camshaft).

The third design has a thrust bearing and redesigned seals, that's what I have now ... I was fortunate enough to have my first replacement done near the end of the 3-yr warranty and it failed within the 2-year "extension", so I got the newest design for free.

This was twice-lucky as the new pump REQUIRES replacement of the camshaft drive gear on bikes with the earlier pump designs so it would have been an expensive job if I'd had to pay for it. Good news was that since they were "in there anyway" they agreed to check the valve lash for just a few extra bucks ...

The 3rd design seems pretty robust and I think it will last, the other two designs seemed a bit crude...
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Old 01-02-2014, 07:04 PM   #8
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Hey thanks for the info guys...lucky u JR!

Been monitoring for a while now, doesn't seem to stop. Just hoping it doesn't fail the other side n gets mashed up with the coolant!

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Old 01-02-2014, 07:15 PM   #9
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The BMW guys aren't geniuses when it comes to designing water pumps. The 650's were designed like this.
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Old 01-02-2014, 07:33 PM   #10
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I fear you might not be fully comprehending so I took mine apart to get a pic. Just for you.


The small plastic gear goes on top in this pic and you can see the dynamic seal for oil. It's just splash oil, no pressure. On the other end is where the impeller screws on. It has another dynamic seal and is exposed to pressurized coolant around 25 psi. You can see the two o rings with the seep hole between them which aligns with the hole you see your oil coming from. So an oil leak will be just a weep since there's no pressure. A coolant leak will also be a weep unless all goes to shit then it will be gushing out that same hole. The coolant isn't going to go into the engine as the weep hole is the path of least resistance. You'll be out of coolant before a few drops will possibly get into the head.

Are you pickin' up what I'm layin' down?


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Old 01-03-2014, 01:41 AM   #11
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I See your new engine has arrived! Happy new year Dad!
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Old 01-03-2014, 04:42 AM   #12
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HNY to you too mon ami.

Now get outta my shed, a new "tenant" is arriving tomorrow. Sorry, I just know you two won't get along.
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Old 01-03-2014, 05:59 AM   #13
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HNY to you too mon ami.

Now get outta my shed, a new "tenant" is arriving tomorrow. Sorry, I just know you two won't get along.
you are supposed to give me two month notice before kicking me out
If its so inconvenient to you, I'll stay in your bedroom
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Old 01-03-2014, 01:05 PM   #14
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While they are replacing the seals... the 'factory trained' mechanic somehow broke some parts off and end up replacing the whole pump/seal unit
Was told that I got 2 years of warranty from date of replacement.
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Old 01-03-2014, 02:48 PM   #15
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You don't need to be factory trained to F that up!

Although the o rings are doing the sealing, the outer flange is siliconed before insertion as per the manual. It takes a lot of force to break it loose. The impellor special removal tool is a spread pair of needle nose pliers that leaves a lot of room for destruction. Add that to the pressure of the boss demanding production.

Meh.
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