14 AB Volvo Penta / Diesel Engine TAMD71B
4.3 Coolant
The engine’s internal cooling system (freshwater system) is filled with a mixture of freshwater and ad-
ditives.
NOTE! Never use freshwater without additives. The following recommendations should be followed to
prevent frost and corrosion damage to your engine:
When there is a chance of freezing
Use a mixture of 50% Volvo Penta antifreeze (glycol) and 50% pure water (as neutral as possible).
This mixture will protect against freezing to a temperature of approx. –40°C (–40°F) and
should be used all year round.
Note! There should be at least 40% antifreeze in the system for complete protection against corro-
sion.
NOTE! Glycol is harmful to health (dangerous if ingested).
When there is no chance of freezing
Volvo Penta anti-corrosion agent* (P/N 1141526-2) can be used as engine coolant mixture additive
when there is no risk of freezing. An antifreeze mixture can also be used all year round. Mixture ratio
= 1:30.
See instructions in chap. 10.5.2 for topping up engine coolant. Run the engine once the coolant has
been topped up to allow the additives to work.
NOTE! Anti-corrosive agents are harmful to health (danger if ingested).
* Note! Never mix antifreeze (glycol) and anti-corrosive agents. The two combined can produce foam and drastically reduce the
coolant’s effectiveness.
Replacing the coolant
The coolant should be replaced and the system flushed at least once every second year. See mainte-
nance schedule.
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