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Home >> Ford >> 1989 >> Aerostar Van Cargo, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Vacuum Check Valve >> Description & Operation
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Description & Operation

Vacuum Check Valves (V-CkV) are used to block airflow in one direction while allowing free airflow in the opposite direction. Typically used in-line with vacuum reservoir to provide a steady vacuum source for components during acceleration or other variable vacuum situations.

NOTE: Use care to prevent oil or dirt from entering valves during testing.