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Thermal Vacuum Valve

Thermal vacuum valve is a major component of EGR system. Test procedures for various thermal vacuum valves are contained in "Datsun Exhaust Gas Recirculation System" article. 

NOTE: Application of thermal vacuum valves between models varies greatly. The 2-port and 3-port valves may be used in any combination to comply with emission standards. Ensure proper valve and connections are used for applicable model.
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