Structural interfaces between the camshaft, timing cover, and tension plates create potential paths for oil and blow-by gas escape. Eliminating these leaks ensures proper pressure regulation and prevents environmental contamination.

Uncontrolled oil mist in crankcase gases leads to intake system fouling and increased oil consumption. Reducing this carryover prevents engine deposits and ensures emission compliance.

Suboptimal valve lift and distribution timing causes volumetric efficiency losses and poor pressure regulation. Precise control of gas flow prevents power loss and excessive crankcase pressure buildup.