Fill
CAUTION
The system must be filled properly to prevent air locks or serious
engine damage can result. During filling, air must be vented from
the engine coolant passages. Wait 2 to 3 minutes to allow air to be
vented; then add mixture to bring the level to the top.
Make sure air is vented during the fill process:
•
Some thermostats have check balls that allow air to vent
through the thermostat when the thermostat is closed.
•
An air vent port connection, which connects to the top tank/
coolant recovery tank of the cooling system, is located next to
the water outlet.
The system has a design maximum fill rate of up to 19 liters (5 gal)
per minute.
NOTE
Some applications may be equipped with a manual bleed valve which
is to be opened to make sure of a proper fill. The upper radiator pipe
is a common location for bleed valves. The illustration is for reference
only.
1 Remove the cooling system fill cap.
2 Fill the cooling system to the capacity or level stated in the
equipment manufacturer service information, using a mixture
of 50 percent water and 50 percent ethylene glycol or propy‐
lene glycol antifreeze.
NOTE
Some applications may be equipped with a manual bleed valve
which is to be opened to make sure of a proper fill. The upper radia‐
tor pipe is a common location for bleed valves. The illustration is for
reference only.
If applicable, open the manual bleed valve before filling the cooling
system.
Once properly filled, make sure to close the manual bleed valve.
1 Engine – 1.7 Cooling system 27
TL2 Maintenance Manual
591 003 Default
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