Breathers

[les]

Hi, I'm trying to get to grips with the breathing system on my van, I think I have a mixture of different designs---- the rocker cover has no breather take off, the engine cam follower cover has a breather pipe exiting to the ground and the carburetter has a 1/4nch diameter brass tube protruding at an angle from the body, that at the moment sucks air. I would like to know the best system to adopt rather than necessarily the correct one for the vehicle year, which incidentaly is 1970. Can anyone help please?
btw. the brass tube mentioned earlier has the option of a nylon insert that in effect reduces the diameter to approx 1/8 inch, would also like some info on this idea.

[sirrom]

The later 10ME engines had a closed ciruit breather on them. The side plate breather didnt go downwards but came up to the valve and then it went to this other pipe you referring to.
But havent seen on for a long time

[bmcecosse]

The pipe on side of carb shoudl not draw air - it should be connected to a breather. There should always be two breathers - the three possibilities are timing case cover/cam follower chast cover/rocker cover. Any two will do! Connect one of them (rocker cover is most convenient) to the carb side inlet. Not seen the nylon insert - but I would say keep it in there - 1/8" is about right.