mk1-forum.net

Hello,

My '70 998cc is running a single HS4 with a breather pipe. Up until now i've had the breather pipe blocked off but I wondered if I should put it to use. Should I connect this to the rocker cover, the crankcase breather or both? Or should I leave it blocked? Should I connect the rocker cover and the crankcase breather to the same pipe and have it run off or in to a catch can? Or should the crankcase be left on its own and the rocker cover piped into the carb? Any help would be grand. Cheers,

My bog standard MK2 998 has the rocker cover pipe connected to the standard round tin air filter box on an 1 1/4 carb. there is also a breather pipe off the back of the tappet chest cover.
Because of your carb / filter set up things are a bit different though. Have you got a breather off the timing cover.?