Aeon AT56-69E, Service Manual, Page: 28 / 196

MAINTENANCE
2-18
With the engine at operating temperature, the coolant level
should be between the upper and lower marks on the coolant
recovery bottle. If not, perform the following procedure.
1. Position the vehicle on a level surface.
2. View the coolant level in the recovery bottle.
3. If the coolant level is below the MIN line, inspect the coolant
level in the radiator.
NOTE: If overheating is evident, allow system to cool
completely and check coolant level in the radiator and
inspect for signs of trapped air in system.
Never remove the pressure cap when the engine is
warm or hot. Escaping steam can cause severe
burns. The engine must be cool before removing the
pressure cap.
NOTE: Use of a non-standard pressure cap will not
allow the recovery system to function properly.
7. Remove recovery bottle cap and add coolant using a funnel.
8. Fill recovery bottle to MAX level with 50/50 or 60/40
mixture of antifreeze and distilled water as required for freeze
protection in your area.
9. Reinstall the recovery bottle cap.
10. If coolant was required, start engine and check for leaks.
Make sure radiator fins are clean to prevent overheating.
COOLANT STRENGTH / TYPE
Test the strength of the coolant using an antifreeze hydrometer.
• A 50/50 or 60/40 mixture of antifreeze and distilled water will
provide the optimum cooling, corrosion protection, and
antifreeze protection.
• Do not use tap water, straight antifreeze, or straight water in the
system. Tap water contains minerals and impurities, which build
up in the system.
• Straight water or antifreeze may cause the system to freeze,
corrode, or overheat.
Cooling System Pressure Test
Refer to Chapter 4 for cooling system pressure test procedure.
COOLING SYSTEM HOSES
1. Inspect all hoses for cracks, deterioration, abrasion or leaks.
Replace if necessary.
2. Check tightness of all hose clamps.
Do not over-tighten hose clamps at radiator, or
radiator fitting may distort, causing a restriction to
coolant flow. Radiator hose clamp torque is 4 Nm (36
in. lbs.).
COOLANT DRAIN / RADIATOR REMOVAL
Coolant Drain
1. Remove the front bumper.
Never drain the coolant when the engine and radiator
are warm or hot. Hot coolant can cause severe burns.
Allow engine and radiator to cool.