Cooling system
62
Filling with coolant
NOTE! Coolant should be filled with the engine
stopped and cold.
Fill until the system is completely filled up, including
the expansion tank. The coolant level should be be-
tween the MIN and MAX levels.
Start the engine and let it run without load at 1000–
1500 rpm for about 5 minutes. Check coolant level.
External systems: When external systems are con-
nected to the engine’s cooling system, the valves to
the systems should be opened and the units vented
during filling. Special venting nipplels may be fitted on
external circuits, especially systems located above
the engine.
IMPORTANT! The engine must not be started
until the system has been completely filled with
coolant.
WARNING! Do not open the pressure cap on a
hot engine. Steam or hot water can spray out
and the system pressure thus lost.
Low system pressure will cause insufficient
cooling!
MAX
MIN
All systems: Fill the system carefully through the ex-
pansion tank opening, approximately 10 – 15 l/min
(2.5 – 4.0 US gal/min) so the system will be de-aired
during filling.
Cooling system volume, see
Operator’s Manual
.
Mixture ratio, antifreeze (glycol)
The mixing of concentrated coolant and water should
contain 40–50% of concentrate in water. If the coolant
contains more than 60% concentrate, there is a risk
that the cooling galleries of the engine or radiator
could be blocked by contamination. If there is less
than 40%, corrosion protection, cooling performance
and frost protection is impaired.
Anti-corrosion agent
When there is no risk of freezing Volvo Penta anti-cor-
rosion agent may be used
NOTE! Never mix the Volvo Penta anti-corrosion
agent with antifreeze. Use anti-corrosion agent only in
areas where there is no risk of freezing. This applies
also for off season storage.
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