Aeon AT56-69E, Service Manual, Page: 60 / 196

ENGINE
4-7
COOLING SYSTEM
SPECIFICATIONS
CONDITION SPECIFICATION
Thermostat Open 65° C
Thermostat Full Open 80° C
System Capacity 1200CC
Fan Switch “On” 75° C/ 85° C (Two type)
Pressure Cap Relief 0.9 Bar
Recommended Coolant
Use only high quality antifreeze/coolant mixed with distilled
water in a 50/50 or 60/40 ratio, depending on freeze protection
required in your area.
PRESSURE TEST
1. Remove the front bumper.
2. Remove pressure cap and pressure test the cooling system
using a commercially available pressure tester.
3. The system must maintain 0.7 Bar (10 psi) for five minutes
or longer.
4. If pressure loss is evident within five minutes, check the
radiator, hose, lamps and water pump seals for leakage.
COOLANT CIRCULATION
A) From radiator to coolant pump.
B). From coolant pump to cylinder
C). From Thermostat valve to radiator
(High capacity circulation when coolant temperature over
65
℃
)
D). Bypass-from Thermostat bypass tube to radiator.
( low capacity circulation when coolant temperature below 65
℃
).
Pressure Cap Test
Never remove pressure cap when engine is
warm or hot. The cooling system is under
pressure and serious burns may result.
Allow the engine and cooling system to cool
before servicing.
1. Remove pressure cap and test cap using a commercially
available pressure cap tester.
2. The pressure cap relief pressure is 0.9 Bar (13 psi). Replace
cap if it does not meet this specification.