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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Engine) >> Engine, Cooling >> Cooling System Cleaned (Oil/Coolant Mixture) >> Filling, Bleeding And Cleaning Coolant Circuit

Filling, Bleeding And Cleaning Coolant Circuit

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  1. Screw lid adapter for coolant expansion tank (K 22) onto the expansion tank.
  2. Connect the flexible extension (FZ 100 K) to the lid.
  3. Connect the vacuum pressure gauge of the bleeder tool to the flexible extension. When doing so, ensure that both shutoff valves are closed (positioned 90° to flow direction)
    Fig 1: Connecting Vacuum Pressure Gauge
    G03092694Courtesy of PORSCHE OF NORTH AMERICA, INC.
  4. Connect the Venturi nozzle onto the vacuum pressure gauge.
    Fig 2: Connecting Venturi Nozzle
    G03092695Courtesy of PORSCHE OF NORTH AMERICA, INC.
    NOTE:
    • The radiator cleaning agent provided must be approx. 2 liters more than the amount which has to be filled.
    • The cleaning agent is mixed with water at a ratio of 50:50.
  5. Place a canister with approx. 23 l coolant cleaning agent (mixed with 50% water) near to the coolant expansion tank.
  6. Connect the filler hose -5-  of the vacuum pressure gauge at the canister connection; put the return line -6-  of the Venturi nozzle into a collecting container. See Fig 3.
    Fig 3: Connecting Filler Hose Of Vacuum Pressure Gauge At Canister
    G03092696Courtesy of PORSCHE OF NORTH AMERICA, INC.
    NOTE:
    • A hissing sound after connecting the compressed air supply is usual.
    • An air pass in the return line -6- should not be obstructed. See Fig 3.
  7. Connect compressed air supply.
    Fig 4: Connecting Compressed Air Supply
    G03092697Courtesy of PORSCHE OF NORTH AMERICA, INC.
  8. Open both shutoff valves on the vacuum pressure gauge until the transparent filler hose has completely filled with coolant.
    Fig 5: Opening Both Shutoff Valves On Vacuum Pressure Gauge
    G03092698Courtesy of PORSCHE OF NORTH AMERICA, INC.
  9. Close the left shutoff valve (V1) on the vacuum pressure gauge and build up vacuum in the coolant circuit.
    Fig 6: Closing Left Shutoff Valve (V1) On Vacuum Pressure Gauge
    G03092699Courtesy of PORSCHE OF NORTH AMERICA, INC.
    NOTE:
    • If a vacuum does not build up, there is a leaking valve in the coolant circuit.
    • Deformation of the rubber hose of the cooling system is normal.
    • If the indicator of the pressure gauge is in the green area of the display scale, enough vacuum has been built up.
    • After both shutoff valves on the vacuum pressure gauge have been closed and the compressed air supply has been unplugged, the vacuum must not drop. If the vacuum drops within approx. 30 seconds, there is a leaking point in the coolant circuit.
  10. When there is enough vacuum in the cooling system (indicator is in the green area), close the right shutoff valve (V2) and subsequently unplug the compressed air supply.
  11. Reopen the left shutoff value (V1) on the compressed air pressure gauge. The cooling system will now be filled. This procedure will take approx. 5 minutes.
    Fig 7: Opening Left Shutoff Value
    G03092700Courtesy of PORSCHE OF NORTH AMERICA, INC.
  12. When there is no trace of vacuum present or the coolant is no longer suctioned from the canister, open the right shutoff valve (V2).
    Fig 8: Opening Right Shutoff Valve
    G03092701Courtesy of PORSCHE OF NORTH AMERICA, INC.
  13. Subsequently remove the complete filling tool (including the lid K 22).
  14. Screw on the cap of the expansion tank.
    Fig 9: Installing Cap Of Coolant Expansion Tank
    G03092702Courtesy of PORSCHE OF NORTH AMERICA, INC.
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