Engine breather hole

[Adamastor]

Although my engine is later than 1979, maybe R65 engines didn't have that hole. I know I opened the breather chamber case and didn't see anything but the breather it-self.
Has anyone seen one of those on a R65? Please don't make me go there again

I also found this:

The cases with this breather hole are easily identified. If the oil breather housing cover has just two bolts, the engine case doesn't have the oil cavity and breather hole. If the housing cover has three bolts, then you DO have the breather hole.
from here: http://bmwscotter.org/procedures/oil_breather_service/oil_breather_service.htm
My housing cover has only 2 bolts.

[Rob Valdez 79 R65]

Adamastor

The oil diagram came from this document originally published in early 1979. It describes the breather function and return of condensed oil vapour via that drain hole

http://www.omnilex.com/public/bmw78/boxloob.pdf

Hey Barry - check it out!  I put you in the FAQ section!
http://www.bmwr65.org/cgi-bin/yabb2/YaBB.pl?num=1269537890/0

[Rob Valdez 79 R65]

Although my engine is later than 1979, maybe R65 engines didn't have that hole. I know I opened the breather chamber case and didn't see anything but the breather it-self.
Has anyone seen one of those on a R65? Please don't make me go there again

I also found this:

The cases with this breather hole are easily identified. If the oil breather housing cover has just two bolts, the engine case doesn't have the oil cavity and breather hole. If the housing cover has three bolts, then you DO have the breather hole.
from here: http://bmwscotter.org/procedures/oil_breather_service/oil_breather_service.htm
My housing cover has only 2 bolts.

Sergio,  I don't have an answer for you, I am sorry.

But thank you for the neat website link!  I don't think I have that in my collection.

[Barry]

Hey Barry - check it out!I put you in the FAQ section!
http://www.bmwr65.org/cgi-bin/yabb2/YaBB.pl?num=1269537890/0  

Thanks Rob.

You can understand why I recently took an interest in the lubrication system.

Adamastor

That's an excellent link to the breather service article. I had seen it before but it seems to have been substantially revised since then. I don't remember seeing the drain hole either but I'm going to have a look again when I get the chance. I'm getting the impression that there may be 2 drain holes. 1 internal that you can't see and 1 close to the breather disc which only some engines have.

[Adamastor]

Glad you liked it, Barry and Rob.. it is strange that R65s don't have this drain hole, but it looks like it ain't there..
All of those with extra R65 engines out of the frame, or who are doing some work on the engine could just take a look and confirm if it exists?...
Regards,
Sergio

[Rob Valdez 79 R65]

Does one have to pull the flapper valve out of the block to see it?

If so, I am NOT going there!  Maybe on my dead engine, next week, when I am off work.

[Adamastor]

Apparently you just have to open the breather valve case (unscrew it and look inside). No need to take out the valve it-self (it ain't easy to do that).. At least that's what I did... it is a 10 min job at max..