bad valve cover seal and incorrect oil cap, should be vented, what you're seeing as being from the crankcase vent is both leaks running down the engine and pressure build up in the crankcase
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
