BMW K bikes (Bricks)


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1Back to top Go down   Oil Leak Empty Oil Leak Sat Jul 27, 2024 8:00 am

Garfoid79

Garfoid79
active member
active member
Oil Leak 20240712
Oil Leak 20240713
Hi

I have a small oil leak near the hall sensor. Took plate off and I can see daylight (see photos). What should be here and what's the easiest fix?

    

2Back to top Go down   Oil Leak Empty Re: Oil Leak Sat Jul 27, 2024 3:41 pm

Dai

Dai
Life time member
Life time member
A hole in the crankcase? Looks like a new engine to me.

















Joking aside, the timing chest has no gasket - it just has a bead of sealant around it. My guess is someone used a cheap RTV and a chunk has fallen out. You'll need to pull the cam cover to get the timing chest off; you'll need both the inner and outer cam cover gaskets, plus the twelve special rubber bungs under the cam cover screws. 

You have a choice when it comes to the crankshaft cover. The timing chest should wriggle off but it does expose the end of the crankshaft cover gasket. You can either run a bead of sealant across the exposed rubber gasket or replace the gasket and all ten special rubber bungs. I've done both.

OTOH if you've drawn up a chair in the cheapskate side of the room, you can just clean the area and force some sealant into the hole. The preferred sealent around here was (past tense) Threebond 1125 but it's not longer available. Threebond 1184 or 1215 should be good enough.


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1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

3Back to top Go down   Oil Leak Empty Re: Oil Leak Sun Jul 28, 2024 9:36 am

Rick G

Rick G
admin
admin
There is supposed to be an open hole at the rear of that opening where the arrow is and if oil is coming from that then the only place it can be coming from is the crank seal on the front of the crankshaft. It's behind the hall sensors and as Dai said the cam chain cover has to come off.
A good chance to replace all the old rubber gaskets and seals.


__________________________________________________
"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
    

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