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"KRS/GT" Technical Q&A K1200RS/GT Technical Questions/Answers

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  #1  
Old 02-12-2018, 04:30 PM
Rob955i Rob955i is offline
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Another leak

I noticed an oil leak, which looks like its coming from where the timing cover bolts to the engine case, but looking on the Max parts fiche there is no gasket ??? There is a gasket for the smaller cover but the leak is or looks like its more to the left side of the bike. Any ideas on this?
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  #2  
Old 02-13-2018, 12:20 AM
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Re: Another leak

Rob, there is no gasket just a bead of silicone put on when you re assemble the cover. There is a couple of stickies, flying kiwi has one on the timing chain tensioner replacement and there is another on checking the valve clearances that talks to getting a good seal. It is however one of the joints that is inclined to weep.
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Old 02-13-2018, 06:56 AM
Rob955i Rob955i is offline
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Re: Another leak

So most likely the crankshaft seal is probably leaking then? Bike is springing more leaks than the exxon valdez. If there is just a bead of silicone being used as a gasket it really cant hold a whole lot of oil then? Or cant be much oil pressure, so thats why im assuming the seal is probably shot. Starting to believe that maybe synthetic oil isnt the right choice for these bikes.
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Old 02-13-2018, 07:01 AM
Rob955i Rob955i is offline
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Re: Another leak

Quote:
Originally Posted by alex
Rob, there is no gasket just a bead of silicone put on when you re assemble the cover. There is a couple of stickies, flying kiwi has one on the timing chain tensioner replacement and there is another on checking the valve clearances that talks to getting a good seal. It is however one of the joints that is inclined to weep.

Just tried to go into the sticky about the timing cover leak and it opened with sorry couldnt find that page
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Old 02-13-2018, 07:15 AM
Rob955i Rob955i is offline
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Re: Another leak

After reading thru Flying Kiwi's post on the cam chain guide replacement, it looks like a real fun job, geez
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Old 02-14-2018, 12:23 AM
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Re: Another leak

Rob, it is not something you need to leap into unless the leak is severe. Wait until the valve clearance check is due and do it then.
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Old 02-14-2018, 04:57 PM
Rob955i Rob955i is offline
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Re: Another leak

Thats the thing though, I dont know when the last time the clearance was checked, if ever. Im gonna be starting the main seal/o- ring job in a few days so im thinkin, well why not .All the plastic will be off it, kinda on my way there so to speak.
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Old 02-15-2018, 04:33 AM
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Re: Another leak

Good luck.
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Old 02-20-2018, 09:50 PM
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Re: Another leak

Yeah....leave that one til next year,typical timing cover leak just where the head meets the engine block.There is that one spot where they leak where the timing cover seals over the block/head/head gasket gap.

Personally I think the head gasket may shrink a little as it ages causing the leak.

Still I'd take the little timing cover(Hall sensor) off just to make sure it isn't a crank seal and inspect the oil/water pump weep hole also.

And learn to post pics? Saves guessing?Which one of them timing cover bolts looks oily/dirty?

Tame them leaks on a BMW? Loctite 518 rules.
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Old 02-21-2018, 10:45 AM
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Re: Another leak

The leak is on the left hand side of the bike on the bottom edge of the cover. Right around where the head would meet the engine block I guess. All these leaks started when I changed to full syn. oil .

And I tried to post pics. but on this site its about as easy as splitting the atom. Im not good with this computer crap anyway, my PC is old and out dated and so is my phone.

I did pick up a gasket for the small cover, not sure what I should do, its only gonna get worse plus its an oil leak and I cant stand it.

Starting on the main seal/o-ring replacement cluster #*%! today and I was of the thought that while all the body work is off, ??? the hell.
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Old 02-24-2018, 12:03 PM
voxmagna voxmagna is offline
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Re: Another leak

I've been away from the board for a while having already contributed most of what I know in the archives. There is much written about the correct clean procedure to re-apply silicone gasket to the timing cover which is virtually impossible whilst oil may be still dripping out.

When I had MY'97 in pieces I was rather horrified at what the timing cover was doing. It is forged with high pressure oil galleries in the cover which mate up to holes in the engine block. Inside a timing cover you wouldn't expect so much engine oil that the cover edge seal would be so critical?

At the time my theory was the cover face seal was poor on those oil galleries, allowing oil under pressure to work out and into the timing cover space. When the cover gets hot it expands and worsens the face seal. allowing too much oil to well up behind the cover

My solution was pretty radical: Check the archives because this is from memory: I milled the oil gallery holes in the block (and cover?) slightly larger and set in stainless steel sleeves Loctited on one side. I think I made my own timing cover gasket then fitted thin Viton O rings over the tubular sleeves. The O ring wall thickness is determined by the thickness of the gasket. Allowing for some compression of the cover gasket, the O rings should compress about 20-30%. If I had had a decent workshop I would have machined circular grooves in the cover or block and fitted Viton O rings for the cover to pull down on. The gasket profiles I used are somewhere here in the archive. Since my engine rebuild and over 40K, I have NEVER had a timing cover leak.

At the time I don't think many appreciated just how much oil can well up behind the cover if there are leaks on those face seals. Be re-assured the small oil pressure leak is unlikely to affect overall oil pressure - it's just a nuisance inside the timing cover. You don't see oil leaks on new covers they become distorted over time with heat cycling. Once removed, all K1200 timing covers should be checked for flatness on a surface plate.
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Old 02-24-2018, 01:32 PM
Rob955i Rob955i is offline
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Re: Another leak

Geez, that seems like an awful lot of work and I think beyond my capabilities. A million ???'s I dont know where to begin. What did you use for gasket material? Is it in a sticky or am I gonna have to scroll back pretty far to search for it?
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