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Home >> Subaru >> 2024 >> Impreza Base >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Thermo Control Valve Assembly >> Removal

Thermo Control Valve Assembly: Removal

NOTE:
  1. Release the fuel pressure. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>FUEL>PROCEDURE>RELEASING OF FUEL PRESSURE .
  2. Open the fuel filler lid and remove the fuel filler cap.
    NOTE: This operation is required to release the inner pressure of the fuel tank.
  3. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
  4. Drain engine coolant. Ref. to COOLING (H4DO)>ENGINE COOLANT>REPLACEMENT>DRAINING OF ENGINE COOLANT .
  5. Remove the high-pressure fuel delivery pipe assembly. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>HIGH PRESSURE FUEL DELIVERY PIPE>REMOVAL>HIGH-PRESSURE FUEL DELIVERY PIPE ASSEMBLY .
  6. Remove the bolts securing the engine ground and harness case.
  7. Remove the clip securing the engine wiring harness.
    G16761538Courtesy of SUBARU OF AMERICA, INC.
  8. Disconnect the connector.
    G16761539Courtesy of SUBARU OF AMERICA, INC.
  9. Remove the engine wiring harness stay.
    NOTE: When it is difficult to remove the bolt, use a crowfoot wrench.
    G16761540Courtesy of SUBARU OF AMERICA, INC.
  10. When thermo control valve assembly is replaced
    1. Remove the bolts securing the thermo control valve assembly.
    2. Remove the thermo control valve assembly from each hose.
      G16761541Courtesy of SUBARU OF AMERICA, INC.
      (A) Water hose
      (B) Water hose
      (C) Water hose
      (D) Preheater hose
  11. When thermo control valve assembly is not replaced
    1. Remove the bolts securing the thermo control valve assembly.
    2. Remove the thermo control valve assembly and each hose as a single unit.
      CAUTION: Water hoses should not be disconnected unless the thermo control valve assembly is replaced. This may cause damage to the thermo control valve assembly.
      G16761542Courtesy of SUBARU OF AMERICA, INC.
      (A) Water hose
      (B) Water hose
      (C) Water hose
      (D) Preheater hose
    3. Remove the gasket from the thermo control valve assembly.
      G16761543Courtesy of SUBARU OF AMERICA, INC.
    4. Remove each hose from the thermo control valve assembly.
      NOTE:
      • Perform this procedure only when required.
      • To avoid excessive load to the thermo control valve assembly during removal, cut through the hoses.
      G16761544Courtesy of SUBARU OF AMERICA, INC.
      (A) Water hose
      (B) Water hose
      (C) Water hose
      (D) Preheater hose
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