"Positive Crankcase Ventilation" .... puts the fumes/smoke from the engine innards back into the combustion chamber, prevents pressure build up in the crankcase from blow by

Bill


Moved over to the Passing Lane

"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