Power Solutions International — Drain, flush, and replace engine coolant
Maintenance · Cooling system
From a Power Solutions International operator's manual — check it applies to your exact model before use.
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Before you start
- Use of a fill pump is required to properly purge air; failure can damage engine.
- Never remove radiator cap while engine is operating or hot.
Procedure
- Shut off engine and cool below 100°F (38°C); remove overflow tank filler cap.
- Attach hose to radiator drain valve; drain approximately 65 gallons.
- Inspect hoses and clamps; replace worn parts.
- Close drain plugs and oil cooler drains.
- Connect coolant pump to radiator fill fitting; fill with deionized/distilled water.
- Run engine at 1800 RPM at least 30 minutes; shut off and cool.
- Drain water; refill with PSI-approved pre-mixed coolant.
- Run at 1800 RPM at least 30 minutes; top off to full cold line.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Cool below 100°F (38°C)
- Approximately 65 gallons
- Run 1800 RPM minimum 30 minutes
Source: Power Solutions International 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.