Carrier V2203-DI (26--00128) User Manual

Page 63

4--2

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FULL

LOW

2. If the coolant level is too low, check the reason for the

lost coolant.

a. If coolant loss is due to evaporation, add only clean

soft water.

b. If coolant loss is due to a leak, repair the leak, then

add a coolant mixture of the same type and specifi-
cation that is in the system. If the coolant brand can-
not be identified, drain out all of the remaining cool-
ant and refill with a totally new mix.

NOTE

When adding coolant to the system, air must be
vented from the engine coolant passages by jig-
gling the upper and lower radiator hoses.

Be sure to close the radiator cap securely. If the
cap is loose or improperly closed, coolant may
leak out and the engine could overheat.

Do not use an antifreeze and scale inhibitor at
the same time.

Never mix different types or brands of coolants.

4.1.4 Radiator Cap

1. Attach the radiator cap to a pressure tester.

2. Apply pressure and observe the time for the pressure

to fall.

3. If the measurement is less than the factory specifica-

tion, replace the cap.

Pressure Falling

Time

Factory

Specification

More than 10 seconds

for pressure fall from

88 to to 59kPa

0.9 to 0.6 kgf/cm

13 to 9 psi

4.1.5 Radiator

1. Fill the radiator with water.

2. Attach the pressure tester to the radiator.

3. Apply pressure and look for leaks.

4. Repair/replace as necessary to assure that the speci-

fied pressure will hold.

Radiator Leakage

Test

Factory

Specification

157 kPa

1.6 kgf/cm

23 psi

4.1.6 Thermostat Opening Temperature

1. Suspend the thermostat in water by a string with one

end of the string inserted between the valve and its
seat.

2. Immerse the thermostat in water and raise the tem-

perature of the water gradually.

3. With a thermometer, read the temperature of the

water when the valve opens and leaves the string.

4. Continue heating the water, read the temperature of

the water when the valve has opened approximately
6mm (0.236 in).

5. If the measurement is not within the factory specifica-

tions, replace the thermostat.

Thermostat

Opening

Temperature

Factory

Specification

80.5 to 83.5.5

176.9 to 182.3

Thermostat

Full Open

Temperature

Factory

Specification

203