Eagle,

Are you talking about the breather pipe from the crankcase at the back of the block which goes to the rocker cover (cvh) if so i 've never seen
any fitting in that pipe and just rebuilt my motor and washed out all the breather pipe's, inc the pipe work from the top of the rocker cover
injection RST. had loads of cvh engines, so would be interested to know
if there should be some sort of a valve in place.


Regards Dave R.