BMW K bikes (Bricks)


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robmack

robmack
Life time member
Life time member
Hi, I need to remove the cover over the timing chain on a K75 engine. There is a seal on the cover that seals the hall effect sensor shaft. Will it be necessary for me to unconditionally replace that seal when replacing the cover? Or is it reusable as is?


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Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

Rick G

Rick G
admin
admin
Seals are reuseable but it probably is something like 25 years old. Unless you know for sure it is only a few years old I replace them as a matter of course. With the heat there or anywhere on an engine I would be using a viton seal as they cope with the heat much better than a norman Nitrile seal.


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"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

robmack

robmack
Life time member
Life time member
Thanks Rick. That particular seal is similar to the rear main seal but it is shaped in a way that necessitates a special BMW installation tool to ensure the seal wiper is correctly positioned. I'd replace the seal if it is deteriorated but don't relish the thought of trying to fit a new one. I hope the old will be easier to refit (maybe I'm mistaken though).


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Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

charlie99

charlie99
VIP
VIP
there have been a few threads about that particular seal and installation rob

some clever folks found a pill bottle that works well for the sealing lip, to hold it in place whilst the housing- seal is reinstalled


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

Rick G

Rick G
admin
admin
I did that seal on two Ks before I found out about the special trick but I just make sure the lip goes on correctly when installing and have not had any trouble. Of course now that I have opened my big fat mouth I will probably find a big pool of oil right there under the hall sensors. Will I need to replace the seal if removing the timing cover? 652573


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

rosskko

rosskko
VIP
VIP
This was the small win for me. Works well.
Hope you don't struggle with all the technical lingo.



'So I was stuck on how to get the timing case cover and the seal over the shiney spinny thing at the front without the edges folding over on the seal.
This is where the Fanta came in.
I put this on the inside of the seal with the cap toward the front of the bike, pushed the timing cover back into place and hey presto. The fanta top came shooting out the front and the seal was perfectly in place. Score 1 for me.


Not sure if I should post this in the 'how to' section? I may lack a few photos, but this is at least as good as Alby's recent sprag clutch how to'.Will I need to replace the seal if removing the timing cover? Fanta_10


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1986 K100RT VIN 0093801K100RT with summer fairing for a northern visitor

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321
    

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