Freshwater System - Volvo Penta D13 Operator's Manual

Maintenance
76

Freshwater System

The cooling system ensures that the engine operates
at the correct temperature. It is a closed system that
should always be filled with a coolant mixture.
IMPORTANT:
Coolant of a suitable chemical composition must be
used all year round to protect the engine against
internal corrosion, cavitation and freeze bursting.
This even applies when there is no risk for freeze
damage, to make sure the engine always has a
complete corrosion protection.
Therefore, the use of anti-corrosion agents alone, or
water alone as a coolant, is not permitted in Volvo
Penta engines.
The coolant must be based on Organic Acid
Technology (OAT). Using an improper coolant or
mixing with another coolant will rapidly reduce the
performance and lifetime of the engine. Material
incompatibility can lead to leakages, which - in the
worst case - can cause engine breakdown.
Volvo Penta strongly recommend the use of our own
coolants, "Volvo Penta Coolant VCS Ready Mixed" or
the concentrate "Volvo Penta Coolant VCS", which
ensure the protection of the cooling system
components from corrosion, ageing, swelling and
cracking, thereby ensuring optimal engine lifetime.
Over time the corrosion protection additives become
less effective, and consequently the coolant must be
changed at regular intervals to maintain sufficient
protection of the engine. The latest Service Protocol
that specifies service intervals can be found at
volvopenta.com.
Coolant, Mixing
It is extremely important that the system is filled with
the correct coolant concentration; refer to Technical
Data, page 101.
The coolant should be mixed with distilled, deionized
water. For Volvo Penta specified water requirements;
refer to Technical Data, page 101.
NOTICE! If water quality can not be guaranteed, use
ready mixed coolant.
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