Renault Koleos Service Repair Manual: Engine cooling system: Check

IMPORTANT To avoid any risk of damaging the systems, follow the instructions regarding safety and cleanliness and operation recommendations before carrying out the repair.

 

IMPORTANT When working in the engine compartment, take care as the radiator fan(s) may start up unexpectedly (risk of being cut).

To avoid any risk of serious burns when the engine is hot:

  • do not open the expansion bottle cap,
  • do not drain the cooling system,
  • do not open the bleed screw(s).

I - CHECKING THE SEALING OF THE COOLING SYSTEM

Cooling

  • Pressurise the system using the radiator cap checking device (A) and an adapter (B) .
  • Test pressure:
    • 2TR: 0.88 bar
    • M9R: 1.37 bar
  • Check that there are no leaks.

II - CHECKING THE RADIATOR CAP VALVE SEAT

Cooling

  • Check:
    • that the valve seat (1) is inflated at the point that the edge of the metal tappet (2) is not visible when viewed from above,
    • that the valve seat is not dirty or damaged.

III - CHECKING THE VACUUM VALVE

Cooling

  • Pull on the vacuum valve (3) to open it.
  • Check:
    • that the vacuum valve closes completely when it is released,
    • that the vacuum valve is not dirty or damaged,
    • that there are no abnormalities in the opened or closed statuses of the vacuum valve.

IV - CHECKING THE DISCHARGE PRESSURE OF THE RADIATOR CAP

Cooling

  • Apply engine coolant to the surface of the cap seal.
  • Refit:
    • the radiator cap checking device (A) using an adapter (B) ,
    • the radiator cap on the adapter.
Note: The pressure should not drop; if it does, look for the leak.
  • Pump with the radiator cap checking device.
  • Discharge pressure:
    • 2TR: 0.784 - 0.98 bar (limit 0.59 bar)
    • M9R: 1.27 - 1.47 bar (limit 1.08 bar)
  • Replace the radiator cap if there are any irregularities relating to the three components above.
    Engine cooling system: Specifications

    Engine cooling system: Operating diagram

    See More:

    Renault Koleos Service Repair Manual > Left-hand suspended engine mounting: Removal - Refitting: 2TR, and ND5 or ND8
    IMPORTANT Wear protective gloves during the operation. REMOVAL I - REMOVAL PREPARATION OPERATION Position the vehicle on a two-post lift . IMPORTANT To prevent the vehicle from falling, lash it to the vehicle lift using a strap. Remove: the engine cover the air resonator located on the rocker cover ...

    Renault Koleos Owners Manual

    Renault Koleos Service Repair Manual

    © 2018-2020 Copyright www.rkoleos.com
    0.0123