34
32
31, 41, 43
Cooling system
The cooling system is divided into a freshwater and a seawater system. The seawater pump sucks water into the
seawater system through the drive/reverse gear. The seawater is then pumped through the charge air cooler oil
cooler, heat exchanger and then into the exhaust elbow pipe where it is mixed with the exhaust gases. The
freshwater system is the internal engine coolant system. It is a closed system driven by the circulation pump.
The freshwater system engine coolant is cooled in the heat exchanger by the seawater.
WARNING! Risk for water penetration when working with the cooling system. Close the sea cock (does not
apply to drive).
Coolant. General
The freshwater system must be filled with a coolant
that protects the engine against internal corrosion and
from freezing (if the climate requires it). Never use
freshwater alone.
WARNING! Anti-corrosive agents and antifreeze
products are harmful to health (do not drink!)
If there is a risk for freezing at any time of year, the
engine coolant system must be filled with a mixture
of 50% Volvo Penta antifreeze and 50% clean water
(as neutral pH as possible). This mixture prevents cor-
rosion and protects against freezing down to approx. –
40°C. It should be used all year round. NOTE! There
should be at least 40% antifreeze in the system for
complete protection against corrosion.
Where there is no risk of damage from freezing the
engine coolant can be fresh water with of Volvo Penta
anti-corrosion fluid added. Mix according to the in-
structions on the packaging.
IMPORTANT! Never mix antifreeze (glycol) and
anti-corrosive agents. The two combined can
produce foam and drastically reduce the cool-
ant’s effectiveness.
Coolant. Filling
WARNING! Do not open the engine coolant sys-
tem filler cap when the engine is still hot except
in an emergency. Steam or hot coolant may
spray out.
Turn the filler cap to the first stop and let any pressure
escape from the system before removing the cap. Top
up coolant if necessary. The coolant level should be
between the MAX and MIN marking on the expansion
tank when the engine is at normal operating tempera-
ture. The level is normally lower when the engine is
cold. Reinstall the filler cap.
To Next Page
Loading...
Need help?
General
