Volvo TAD734GE, User Manual

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33
Maintenance
Cooling System
The cooling system ensures that the engine works at the right temperature. It is a closed system and must
therefore always be filled with a mixture of at least 40 % concentrated coolant and 60 % water, to protect against
interior corrosion, cavitation and frost bursting.
We recommend that you use “Volvo Penta Coolant, Ready Mixed” , alternatively “Volvo Penta Coolant” (con-
centrated) mixed with pure water according to spec, see “Coolant. Mixing”. This grade of coolant is the only one
suitable for, and approved by, Volvo Penta.
For complete engine protection the coolant should contain good quality ethylene glycol of a suitable chemical
composition. Using an anti-corrosion mixture exclusively is not permitted in Volvo Penta engines. Never use water
alone as the coolant.
IMPORTANT! Coolant of a suitable chemical composition must be used all year round. This applies even if
there is no risk for frost damage, so that the engine has complete corrosion protection.
Future warranty claims on the engine and ancillaries may be rejected if an unsuitable coolant has been used
or if the instructions concerning coolant mixing have not been adhered to.
NOTE! Corrosion protection additives become less effective after a time, which means that the coolant must be
replaced; see “Maintenance schedule”. The cooling system should be flushed when the coolant is changed; refer
to “Cooling system. Cleaning”.
“Volvo Penta Coolant” is a concentrated coolant
which must be mixed with water. It has been prepared
to work best with Volvo Penta engines and offers ex-
cellent protection against frost and cavitation damage,
plus frost bursting.
“Volvo Penta Coolant, Ready Mixed” is a ready-
mixed coolant, 40 % “Volvo Penta Coolant” and 60 %
water. This mixture protects the engine from corrosion
damage, cavitation damage and frost bursting down to
-28 °C.