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Home >> Mazda >> 1986 >> RX-7 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Air Management System >> System Testing >> Air Induction System >> Coolant Thermo Valve (Auto. Trans.)
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Coolant Thermo Valve (Auto. Trans.)

  1. Remove coolant thermo valve from engine. Immerse coolant thermo valve in water.
  2. Heat water gradually and observe the temperature. Below approximately 154°F (68°C), air should pass from middle vacuum line to bottom vacuum line. Above approximately 154°F (68°C), air should pass from middle vacuum line to top vacuum line.