I think this is curious....anyone thought it is the cam map of this particular dinky camshaft pair causing the resultant valve overlap with consequences by DESIGN. I'd love to see the cam mapped on paper before commenting too harshly but on reflection this is fairly typically European (of agriculturally derived engines) designed like the older Claas, Fiat, Pasquali, Same, Valpadano and a few other lesser known marques where they were known to run for eons w/o trouble.
Historically used as a UCL and valve train lube before it was so heavily sullied in very recent times with that gremlin EGR carbon loading. Indeed this explains (to some extent) why it is in fact by design a closed crankcase system. Putting it rather in an overly-simplified way, of course.
Point on ProVent 200: She do be too big for this leeettle donk.
I am not installing a ProVent but am 'stead a smaller (better matched to the output through the system but simular design to in that it does the same things). Remembering I don't have issues with freezing. I think the Provent is just too big to contribute any centrifugal separation to oil mist and relies almost solely on the coalescing filter medium at any perceived mist loads making the material of the fabric filter quite important.
It is curious what a monomoeter and flowmeter read at various throttle settings. Regrettably I was not in a position to evaluate under different loads which of course changes the propensity to mist load and I don't know where my figures went but this measurement was what pushed me to go in the direction of a unit sold in Australia by Forefront Industries with a washable filter element and easier to fit to-boot. Hoses are 3/4" both in and out and it can be positioned in 4 orientations for ease of fitment. BUT the diameter is the critical factor. There is (in my deciding trials) a positive component of a centrifugal separation as well as the coalescing filter.
http://www.forefrontindustries.com.au/# ... -universalThe Provent being more appropriate to larger diesel applications.
S'pose I'm in agreement (well - close) with gm.