Renault Koleos Service Repair Manual: Diesel injector fuel return rail: Removal - Refitting

Renault Koleos Service Repair Manual / Engine and peripherals / Diesel injection / Diesel injector fuel return rail: Removal - Refitting

M9R

Diesel injection

IMPORTANT Consult the safety and cleanliness advice and operation recommendations before carrying out any repair .

 

IMPORTANT Use the diagnostic tool before any operation is carried out on the injection circuit to check:
  • that the rail is not under pressure,
  • that the fuel temperature is not too high.

Working on the circuit with the engine running is strictly forbidden.

 

IMPORTANT During this operation, be sure to:
  • refrain from smoking or bringing red hot objects close to the working area,
  • be careful of fuel splashes when disconnecting the union.

 

WARNING To avoid any corrosion or damage, protect the areas on which fuel is likely to run.

REMOVAL

I - REMOVAL PREPARATION OPERATION

  • Remove the front engine cover.

Diesel injection

  • Rotate the intercooler air inlet pipe clip (1) on the turbocharger.

Diesel injection

  • Remove the intercooler air inlet pipe bolt (2) from the fuel pipe support.
  • Move the intercooler air inlet pipe to one side.

Diesel injection

  • Remove the protector plate (3) from the injector rail protector.
  • Remove:
    • the injector rail protector
    • the oil separator.

II - OPERATION FOR REMOVAL OF PART CONCERNED

Diesel injection

  • Remove the diesel injector fuel return rail bolt (4) from the rocker cover.
Note: Do not allow any diesel fuel to enter the engine via the rocker cover opening during this operation.
  • Disconnect the quick-release union (5) , located on the diesel injector fuel return rail, from the diesel return pipe.
  • Raise the mobile section (6) of the injector union on the diesel injector fuel return rail.
  • Remove:
    • the diesel injector fuel return rail,
    • the seal between the diesel injector and the diesel injector fuel return rail, from each injector.
  • Insert the blanking plugs.

REFITTING

I - REFITTING PREPARATION OPERATION

  • Always replace:
    • the seal between the diesel injector and the diesel injector fuel return rail,
    • the intercooler air inlet pipe seal.
WARNING Do not remove the blanking plugs from each component until the last moment.

Also, do not remove the components from their packaging until they are to be fitted to the vehicle.

II - REFITTING OPERATION FOR PART CONCERNED

  • Remove the blanking plugs from the inlet and outlet unions of the fuel filter.
  • Refit:
    • the seal between the diesel injector and the diesel injector fuel return rail, from each injector,
    • the diesel injector fuel return rail.
  • Clip on the diesel injector fuel return rail unions.
  • Connect the diesel injector fuel return rail unions.
  • Refit the diesel injector fuel return rail bolt on the rocker cover.
  • Torque tighten the diesel injector fuel return rail bolt on the rocker cover (10 N.m).

III - FINAL OPERATION

  • Refit:
    • the oil separator
    • the injector rail protector.

Diesel injection

  • Remove the intercooler air inlet pipe seal using a tweezers.

Diesel injection

Note: Check that the seal (7) on the intercooler air inlet pipe is fitted the correct way round.
  • Refit:
    • the new seal of the intercooler air inlet pipe,
    • the protector plate on the injector rail protector.
  • Turn the intercooler air inlet pipe to refit the clip in its housing.
  • Clip the intercooler air inlet pipe onto the turbocharger.
  • Refit the intercooler air inlet pipe bolt on the fuel pipe support.
  • Torque tighten the intercooler air inlet pipe bolt (8 N.m).
  • Prime the fuel circuit using the manual priming pump.
  • Refit the engine cover.
    Diesel return pipe: Removal - Refitting

    Injector rail protector: Removal - Refitting

    See More:

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