Originally Posted by sglynn
Am I suppose to let all the oil drain out of the hole the sniffle value goes into before installing the sniffle valve?
I'm installing Sniffle valve now in new Lycoming IO360. When I remove the plug oil drains out. Am I suppose to let all the oil drain out of the hole the sniffle value goes into? Is the oil coming out the same as crank case oil? Is this the same compartment? Would all the oil eventually drain out of engine if I left out the sniffle valve?
Steve, the purpose
of the sniffle valve is to drain liquids from the intake plenum...oil and/or fuel under normal circumstances, and water if you get a load down the air intake while parked in the rain. So yes, if there are liquids in the plenum, they will drain. Shake the valve. Hear the little check ball? It sucks upward and seals the drain when the engine is running at a manifold pressure less than ambient.