Mitsubishi — Changing cooling water
Maintenance · Cooling system
From a Mitsubishi service manual — check it applies to your exact model before use.
Browse Mitsubishi generators & specs →
Before you start
- Cooling water (containing LLC) is harmful. Do not dispose of drained cooling water into regular sewage.
Procedure
- Operate engine until cooling water temperature reaches 70-85°C [158-185°F].
- Allow engine to cool to room temperature; lift lever on radiator filler cap to release pressure, then remove cap.
- Open drain plug on engine and drain plug on radiator to drain cooling water.
- Flush cooling system with cleaning solution, then clean water, repeating until drained water is clear.
- Close drain plugs tightly; pour antifreeze (LLC) and add clean water until radiator is full; tighten cap.
- Crank engine for less than 10 seconds using starter; wait about one minute; repeat to bleed air.
- Operate engine until water temperature reaches 70-85°C; stop engine.
- Allow engine to cool; check cooling water level and add cooling water of same LLC concentration if low.
Specs & values
- Cooling water capacity (in engine only): approx. 6 L [1.6 U.S. gal.] (S4K/S4K-T FridayParts $35.00 SinoCMP $139.00 KuduParts $289.00); approx. 9 L [2.4 U.S. gal.] (S6K/S6K-T FridayParts $23.09 SinoCMP $199.00)
Source: Mitsubishi service 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.