ORIGINAL: gkamysz
Dar, is the above an observation? The OS Surpass 70 and larger have been using a PCV system connected to the manifold for a few years now. Has anyone had any issues? I'm sure OS did their homework. It must work well enough that after a few years they integrated the PCV into the the engine design and the user doesn't even have to think about it. The newest engines (FS-200, FSa-56) vent gases and oil past the cam followers into the rocker well and into the intake port via a small hole in the head. The user isn't even involved anymore.
No Greg, I was just crunching the theory...
The residual amount of surface oil, left in the bearings and even on the cam-lobes, for as long an idle period as one will endure, could just suffice.
After the .70FL used a
sealed rear bearing that in theory, kept all the oil in the crankcase, away from the cams and followers, I could believe anything.