Ford Bronco PCV System Airflow Diagram - Crankcase Ventilation Flow Schematic

This document is a simple hand-drawn color schematic illustrating the flow path of a PCV (Positive Crankcase Ventilation) system on a V-configuration engine. It was uploaded to a 1990 Ford Bronco gallery as "PCV.jpg." The only text labels in the drawing are "Air Box" and "PCV Valve." The diagram depicts fresh air entering from the air box through a hose into the passenger-side (right) valve cover, flowing down through that cylinder bank into the crankcase/oil pan, traveling across the bottom of the engine, rising up through the opposite (left) bank into the other valve cover, exiting through the PCV valve, and being routed by a second hose to a fitting at the top center of the engine (the intake). Bold black arrows throughout the drawing indicate the direction of airflow at each stage. A reader learns the correct routing and flow direction of crankcase ventilation air: filtered air in one side, crankcase vapors metered out through the PCV valve on the other side and drawn into the intake. The document contains no part numbers, torque specifications, year/model applicability statements, or other tabular data — it is purely a conceptual airflow illustration.