Milodon lifter valley pressure vents are a key part of any highly efficient oiling system. They allow crankcase pressure to rise unobstructed for speedier oil drainback into the oil pan. This stops a large portion of the unwanted oil drainback over the cams, which can cause excessive windage and power loss. Existing holes in the block are simply tapped and the vents are screwed in.
Milodon lifter valley pressure vents are a key part of any highly efficient oiling system. They allow crankcase pressure to rise unobstructed for speedier oil drainback into the oil pan. This stops a large portion of the unwanted oil drainback over the cams, which can cause excessive windage and power loss. Existing holes in the block are simply tapped and the vents are screwed in.