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Check Valve (Turbo)

After checking thermo vacuum valves, inspect check valve for no air flow from vacuum valve side-to-air intake boots side. Ensure there is air flow from air boots side-to-vacuum valve side. See Fig 1 . Replace component if improper operation is found.

NOTE: When inspecting vacuum valves, ensure proper operation occurs at specified temperatures.

Fig 1: Sectional View of Thermo Vacuum Valves and Check Valve