Renault Koleos Service Repair Manual: Pressure at end of compression: Check

M9R

Top and front of engine

I - CHECK PREPARATION OPERATION

  • Remove:
    • the engine cover,
    • the heater plugs.

Top and front of engine

  • Fit the hose (Mot. 1772) in place of one of the removed plugs.
  • Moderately tighten the hose (Mot. 1772) (1) using an open-jawed spanner.

Top and front of engine

  • Screw the conversion hose end piece (Mot. 1772) (2) of the diesel compression gauge onto the hose.
  • Moderately tighten the end piece onto the hose (Mot. 1772).

Top and front of engine

  • Connect the diesel compression gauge (3) on the (Mot. 1772).
  • Open the discharge valve (4) of the diesel compression gauge to release the pressure.
  • Close the discharge valve (4) of the diesel compression gauge.
  • Run the command VP 036: " INHIBITION D'ALIMENTATION DE CARBURANT " using the Diagnostic tool.
  • Put the vehicle under starting conditions:
    • manual gearbox in neutral,
    • brake pedal released.

II - CHECKING OPERATION

  • Connect a self-contained starter or an automatic battery charger.
Note: The engine will be turned by the starter for 20 s, without starting.
  • Press the vehicle start button to trigger the engine starting phase.
Note: It is necessary to wait for at least 10 seconds before starting the engine each time (the starter will not run due to its thermal protection).
  • Open the discharge valve to release all of the pressure from the diesel compression gauge.
  • Make progress with the diagram sheet.
  • Repeat this process for other cylinders.
  • Compare the values obtained.

III - FINAL OPERATION.

  • Remove:
    • the diesel compression gauge,
    • the hose end piece (Mot. 1772).
  • Refit:
    • the heater plugs,
    • the engine cover.
  • Run the command VP 037: " ARRÊTER L'INHIBITION D'ALIMENTATION EN CARBURANT " using the Diagnostic tool.
Note: If the engine does not start, run the command VP 037: " ARRÊTER L'INHIBITION D'ALIMENTATION EN CARBURANT " using the Diagnostic tool or switch off the ignition and wait for 3 minutes and restart the engine.

2TR

Top and front of engine

CHECK

I - PREPARATION OPERATION FOR CHECK

IMPORTANT To prevent the vehicle from falling, lash it to the vehicle lift using a strap.
  • Position the vehicle on a two-post lift.

Top and front of engine

  • Remove the cover (1) from the Protection and Switching Unit.

Top and front of engine

  • Remove the fuse (2) of the fuel pump(F13) (15A).
  • Release the fuel pressure in the fuel supply pipe after the engine has started.
Note: After switching the engine off, start it again two or three times to fully relieve the fuel pressure.
  • Remove:
    • the engine cover,
    • the air resonator located on the rocker cover.
  • Disconnect the ignition coil connectors.
Note: Remove all the engine spark plugs.
  • Remove:
    • the ignition coils.
    • the spark plugs.

Top and front of engine

  • Connect a petrol compression gauge (3) .

ND5 or ND8

  • Put the vehicle under starting conditions:
    • gear lever in neutral for manual gearbox,
    • brake pedal depressed.

FK0 or FK8

  • Put the vehicle under starting conditions:
    • gear lever in neutral for automatic gearbox,
    • brake pedal depressed.

II - TEST OPERATION

  • Press the vehicle start button to trigger the engine starting phase.
Note: The engine will be driven by the starter for 20 s, without starting.
  • Measure the engine compressions, cylinder by cylinder, at an engine speed of 250 rpm.
  • Check the compression pressure value:
    • standard compression pressure: 14.4 kg/cm²,
    • minimum compression pressure: 12.1 kg/cm²,
    • compression pressure differential limit between the cylinders: 1 kg/cm².

III - FINAL OPERATION

  • Disconnect the petrol compression gauge.
  • Refit:
    • the spark plugs
    • the ignition coils
  • Connect the ignition coil connectors.
  • Refit:
    • the air resonator located on the rocker cover
    • the engine cover
    • the fuel pump fuse
    • the Protection and Switching Unit cover.
  • Press the vehicle start button to start the engine.
    Top and front of engine

    Accessories belt: Removal - Refitting

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