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Mitsubishi S6R S6R2 / S6R- S6R2 — Fill the radiator

Maintenance · Cooling system

For the Mitsubishi S6R S6R2 / S6R- S6R2, from the Mitsubishi operator's manual.

Applies to: Mitsubishi S6R engine, Mitsubishi PS6 engine

Before you start

  • Crank the engine with the fuel supply shut off
  • Check coolant level only after engine has stopped and cap is cool enough to touch

Procedure

  1. Close engine and water pump drain cocks and tighten the radiator drain plug.
  2. Remove the filler cap and pour pure, undiluted LLC into the radiator.
  3. Add soft water slowly to avoid air pockets; loosen the air vent on top of the thermostat.
  4. Install the filler cap, then crank the engine several times for 10 seconds at about 1-minute intervals.
  5. Check coolant level and add coolant; fill the reserve tank to the FULL mark.
  6. Run under light load until thermostat valve opening temperature is reached to mix LLC with water.
  7. Stop the engine and check the coolant level; add coolant if low.
  8. Check hose joints for coolant leaks.

Specs & values

  • LLC concentrations: 30% at -10°C, 40% at -20°C, 50% at -30°C, 60% at -45°C

Source: Mitsubishi operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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