Volvo Penta — Filling with coolant
Maintenance · Freshwater cooling system
From a Volvo Penta service manual — check it applies to your exact model before use.
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Before you start
- The engine must not be started until the system has been completely filled with coolant.
- Do not open the pressure cap on a hot engine.
Procedure
- Fill the system with the engine stopped and cold, through the expansion tank opening.
- Fill at approximately 10–15 l/min so the system is vented during filling.
- Fill until completely full, including the expansion tank.
- Ensure the coolant level is between the MIN and MAX levels.
- Open valves in external systems and vent the units during filling.
- Start the engine and let it run without load at 1000–1500 rpm for about 5 minutes; check the coolant level.
Specs & values
- Coolant system volume: D4 12.5 L, D6 15.7 L
- Mix 40% Volvo Penta Coolant with 60% water
Source: Volvo Penta 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.