Mitsubishi — Changing coolant
Maintenance · Cooling system
From a Mitsubishi operator's manual — check it applies to your exact model before use.
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Before you start
- Remove the radiator cap only after the engine cools to room temperature.
- Coolant (containing LLC) drained from an engine is toxic; do not dispose of into regular sewage.
Procedure
- If draining immediately after operation, let the engine idle at low speed for 5 to 6 minutes to lower coolant temperature to 70 to 80 degC.
- Open the radiator cap.
- Place coolant receiving cans under the drain cocks and open the drain cocks to drain coolant.
- Close the drain cocks or plug.
- Pour a cleaning solution and operate the engine at 800 to 900 min-1 for about 15 minutes, then drain.
- Close the drain cocks or plugs.
- Pour fresh water and operate the engine at 800 to 900 min-1 for about 10 minutes.
- Continue flushing until the draining water is clear.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Coolant temperature 70 to 80 degC [158 to 176 degF] before draining
- Cleaning operation at 800 to 900 min-1
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.