As you drive down the road the blow-by is sucked out the tube on the block. However when you are stopped it rises and comes out the valve cover vents. That is not unusual and is only a problem in excess. If the tube is plugged then it will always come out the valve cover along with a film of oil.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!