R1100S front crankshaft oil seal

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MikeB
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R1100S front crankshaft oil seal

Postby MikeB » Sun Jan 09, 2022 4:19 pm

I fitted a new Hall Effect Sensor yesterday and the engine started first push of the button so many thanks to those who gave their advice.
I did find however that the front crankshaft oil seal leaks quite badly. I fitted a new one when I removed the cover for painting but I have obviously damaged it when I put the cover back on. I will get a new seal but does anybody have any advice or tips of how to fit one without damaging it? Also I assume that I got it right by preforming the inner lip of the seal so that it protrudes in toward the engine?
As usual, any advice or ideas gratefully received.
BMW R100RS Motorsport, BMW K1, BMW1100S, BMW R1200GS

Mike D
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Re: R1100S front crankshaft oil seal

Postby Mike D » Sun Jan 09, 2022 7:11 pm

Hi Mike

Please see the attached from 1100S manual (but is the same for the rest).

When you 'set' the seal are you sure it wasn't damaged when re-installing the alternator cover. Did you install the seal before or after installing the cover?

In answer to your question on the lip direction, yes it should point towards the engine.

Take care when fitting as it's very easy to catch the notch for the timing disc location and tear the inner edge

Mike
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MikeB
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Re: R1100S front crankshaft oil seal

Postby MikeB » Sun Jan 09, 2022 9:24 pm

Hi Mike,
I think my mistake was to fit the seal into the cover and then fit the cover, so I am sure that you are correct in that I have torn the seal lip on the end of the crankshaft. A real schoolboy error on my part.
I have found a smooth plastic cap from an aerosol that fits nicely over the crankshaft end so hopefully with that covered in engine oil, there won’t be any tearing this time.
Once I have pre-formed the lip of the seal will it stay in the correct orientation with the lip pointing into the engine?

Take care
Mike
BMW R100RS Motorsport, BMW K1, BMW1100S, BMW R1200GS

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Jaythro
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Re: R1100S front crankshaft oil seal

Postby Jaythro » Sun Jan 09, 2022 11:42 pm

Just get a normal oil seal from a bearing supplier nearby or online

Never worry about those stupid Lip seals that BMW supply!

What idiot EVER came up with that idea !!!

Shaft seal 30 X 42 X 7 BMW Part number 11111341357
"Put your Ass on a motorcycle and ride with an attitude and the "Grim Reaper" will ride in your shadow!"

Islandmagee in case you're interested?

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MikeB
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Re: R1100S front crankshaft oil seal

Postby MikeB » Mon Jan 10, 2022 11:47 am

Thanks Jaythro!
BMW R100RS Motorsport, BMW K1, BMW1100S, BMW R1200GS


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