Originally Posted by
Sleigher1
This is a real common problem on the 41A.
I'm not sure about the 40 though.
There are a number of fixes.
Back when I had one I fixed mine by:
Get a valve cover from a 41B.
Get an inspection cover to replace the mount for the breather.
Get a Racor CCV (4500 I think).
Route the port at the top of the new valve cover to the CCV.
Route the CCV into the air filter.
Be done with the bad design.
There were other ways to do it but this ended up looking pretty good and there were never any more issues.
I have a power point presentation on the entire fix if anybody wants it I can email it to you.
Peter