Renault Koleos Service Repair Manual: Turbocharging: Precautions for the repair

Renault Koleos Service Repair Manual / Engine and peripherals / Turbocharging / Turbocharging: Precautions for the repair

M9R

Turbocharging

I - TURBOCHARGER: GENERAL INSTRUCTIONS

For the turbocharging pressure regulator check.

WARNING The turbocharger pressure regulator rod must not be adjusted.

II - TURBOCHARGER CIRCUIT DIAGRAM

Turbocharging

  1. Air filter unit
  2. Air flowmeter
  3. Compressor wheel
  4. Intercooler
  5. Inlet distributor
  6. Exhaust manifold
  7. Turbine wheel
  8. Bearing system (bearing + wheel shaft)
  1. Air filter box air outlet pipe
  2. Turbocharger air outlet pipe
  3. Intercooler air outlet pipe

III - APPLICATION CONDITIONS OF INSTRUCTIONS

The instructions below must be followed when replacing a turbocharger due to mechanical damage:

  • damage to the bearing system,
  • broken shaft or turbine wheel,
  • compressor wheel rubbing against the turbocharger casing,
  • broken or damaged compressor wheel,
  • extensive clogging of the turbine wheel casing (hard deposits).

FOR THE AIR CIRCUIT:

  • Consequences:
    • swarf or metal objects in the turbocharger inlet and outlet pipes,
    • oil in the air circuit (collected in the intercooler).
  • Risks (after replacing the turbocharger):
    • metal objects sucked in by the compressor wheel (destruction of the turbocharger).

FOR THE LUBRICATION CIRCUIT:

  • Consequences:
    • swarf found in the engine oil circuit,
    • circulation of swarf within the circuit.
  • Risks (after replacing the turbocharger):
    • premature wear on the bearing system (destruction of turbocharger).
WARNING Metal objects may enter the oil and air circuits as a result of a broken turbocharger.

Failure to follow the INSTRUCTIONS listed will lead to the turbocharger breaking again.

INSTRUCTIONS:

  • Drain the engine oil .
  • Replace the oil filter.
  • Replace the seals and fittings,
  • Carry out the following only if the compressor wheel is broken or rubbing against the turbocharger casing:
    • Drain the intercooler,
    • Clean the turbocharger air pipes.
Note: When carrying out an operation on the air or lubrication circuit, it is necessary to plug the open holes to prevent any risk of foreign bodies entering the system.

IV - AIR CIRCUIT*: INSTRUCTIONS FOLLOWING MECHANICAL DAMAGE TO THE TURBOCHARGER

Note: (*) These instructions for the air circuit are only to be followed in the case of:
  • broken compressor wheel,
  • compressor wheel rubbing against the turbocharger casing.

Remove the intercooler if fitted to the vehicle.

Turn the intercooler over and allow the oil inside to drain out.

Turbocharging

Note: If the compressor wheel (9) is damaged, metal objects are ejected inside the air pipes.

Check that there are no metal objects inside the air flowmeter (2) .

Remove:

  • the air pipe(between the air filter unit and the turbocharger) (A) ,
  • the air pipe (B) (between the turbocharger and the intercooler).

Turbocharging

For air pipes comprising several components:

  • mark (10) the fitting position of each component,
  • separate all the components.

Turbocharging

One by one, clean the pipes removed with the parts washer :

  • brush as much of the inside of the pipe as possible (only use brushes with plastic bristles),
  • wash plenty of cleaning product from the cleaning station through the pipe,
  • allow the cleaned pipe to drain by standing it upright,
  • ensure the cleaning product has drained out completely (check areas where liquid may be retained, e.g. gaiters, resonators etc.).

Turbocharging

Dry the pipes one by one using a compressed air spray gun.

For pipes comprising several components:

  • assemble the components, taking note of their correct fitting position (10) .

Refit:

  • the air pipe(between the air filter unit and the turbocharger) (A) ,
  • the air pipe (B) (between the turbocharger and the intercooler).

Refit the intercooler, if fitted to the vehicle.

V - LUBRICATION CIRCUIT**: INSTRUCTIONS FOLLOWING MECHANICAL DAMAGE TO THE TURBOCHARGER

Note: (**) These instructions relating to the lubrication circuit must always be followed in all cases of mechanical damage as listed above.

Drain the engine oil.

Replace the oil filter.

Only fill the engine with a suitable oil type.

VI - GENERAL INSTRUCTIONS TO BE FOLLOWED WHEN REMOVING A TURBOCHARGER

Always replace:

  • the oil supply pipe:
    • if the pipe is blocked, even partially (due to scale, carbonised oil etc.),
    • if the pipe is fitted with self-retaining seals.
  • the oil return pipe:
    • if the pipe is blocked, even partially (due to scale, carbonised oil etc.),
    • if the pipe is fitted with self-retaining seals.
  • all seals that have been removed,
  • all fittings that have been removed.
WARNING Failure to observe the following procedure may lead to destruction of the turbocharger.

When starting the engine:

  • do not accelerate,
  • allow the engine to run for 1 minute, the time taken for the oil circuit pressure to increase (until the oil pressure warning light on the instrument panel goes out),
  • accelerate several times at no load,
  • check the air circuit and the oil circuit for leaks.
    Turbocharging

    Turbocharger: Removal - Refitting

    See More:

    Renault Koleos Service Repair Manual > Side opening element mechanisms: Rear side door check strap: Removal - Refitting
    REMOVAL I - REMOVAL PREPARATION OPERATION Remove: the rear side door trim (see Rear side door trim: Removal - Refitting) (72A, Side opening element trim), the rear speaker (see Rear speakers: Removal - Refitting) (86A, Radio). II - OPERATION FOR REMOVAL OF PART CONCERNED Remove the bolt (1) . Remov ...

    Renault Koleos Owners Manual

    Renault Koleos Service Repair Manual

    © 2018-2020 Copyright www.rkoleos.com
    0.0119