Oil breather questions

[Gene Smith]

I have a '69 911S that has Weber carbs installed. The existing breather housing has an additional barb fitting for a hose that I believe was part of the mechanical FI. When the conversion was made, before I got the car, the mechanic used a plug and short piece of hose with two clamps to seal off this now unneeded barb fitting. I got a used housing from eBay and it has only one fitting so I can eliminate the hose/broomstick workaround which bothers me more than a little bit. I loosened the 4 nylocks but was not able to budge the existing housing. I tried a rubber mallet but no luck. I certainly don't want to cause damage over this little peeve! I think the single hose housing is magnesium. I have broken mag castings as a kid (when this baby was built!) and don't want to make a mess. As you know this housing straddles a seam in the cases. Is this doable without a lot of aggravation? Is it standard procedure to glue the hell out of this housing because it mounts over a seam? How do I get it to release? I plan on making my own sealing gasket. What is a different elegant solution to plugging the second fitting? I could be happy with a Fernco style cap fitting but have not found any small enough. What do owners do about the big breather hose when using open air filters?

thanks guys
Gene

[RWebb]

some fittings can be plugged with golf tees - elegant, I dunno?

[911pcars]

Originally Posted by Gene Smith

I have a '69 911S that has Weber carbs installed. The existing breather housing has an additional barb fitting for a hose that I believe was part of the mechanical FI. When the conversion was made, before I got the car, the mechanic used a plug and short piece of hose with two clamps to seal off this now unneeded barb fitting. I got a used housing from eBay and it has only one fitting so I can eliminate the hose/broomstick workaround which bothers me more than a little bit. I loosened the 4 nylocks but was not able to budge the existing housing. I tried a rubber mallet but no luck. I certainly don't want to cause damage over this little peeve! I think the single hose housing is magnesium. I have broken mag castings as a kid (when this baby was built!) and don't want to make a mess. As you know this housing straddles a seam in the cases. Is this doable without a lot of aggravation? Is it standard procedure to glue the hell out of this housing because it mounts over a seam? How do I get it to release? I plan on making my own sealing gasket. What is a different elegant solution to plugging the second fitting? I could be happy with a Fernco style cap fitting but have not found any small enough. What do owners do about the big breather hose when using open air filters?

thanks guys
Gene

You're correct. Your carbed engine no longer needs the MFI temp sensors and hose fitting in the S-type crankcase breather console. The non-MFI version you want to install is correct, but the effect is the same.

Perhaps you can find a Caplug (or equivalent), a plastic industrial cap, over the MFI hose outlet. Attach with a hose clamp. The existing console seems to be glued in there quite well. Be careful if you use prying tools on the parting surfaces.

With individual air cleaners, plumb the breather hose at the oil filler tube into a catch can to help separate oil from the air (don't use the large crankcase hose directly; too much oil velocity at this location), then plumb the vented air from the catch can into the intake tract via hose(s) to the air filter housing(s). If you're less environmental, plumb directly into the atmosphere. There are DIY or off-the shelf products you can adapt for this purpose. There are a few threads on this subject in the archives.

Hope this helps,
Sherwood