Toyota 2VZ-FE Manual page 197

COOLING SYSTEM – Radiator
RADIATOR
CLEANING OF RADIATOR
Using water or a steam cleaner, remove any mud and dirt
from the radiator core.
NOTICE: If using a high pressure type cleaner, be careful
not to deform the fins of the radiator core. If the cleaner
nozzle pressure is 30–35 kg/cm
kPa), keep a distance at least 40–50 cm (15.75–19.69 in.)
between the radiator core and cleaner nozzle.
INSPECTION OF RADIATOR
1. INSPECT RADIATOR CAP
NOTICE: When performing steps (a) and (b) below, keep
the radiator pump tester at an angle of approx. 30° above
the horizontal.
(a) Using a radiator cap tester, slowly pump the tester and
check that air is coming from the relief valve.
Pump speed: 1 push/3 seconds or more
NOTICE: Push the pump at a constant speed.
If air is not coming from the relief valve, replace the radiator
cap.
(b) Pump the tester several times and measure the relief
valve opening pressure.
Pump speed:
1st time
2nd time or more Any speed
Standard opening pressure:
0.75–1.05 kg/cm
(10.7–14.9 psi, 74–103 kPa)
Minimum opening pressure:
0.6 kg/cm
If the opening pressure is less than minimum, replace the ra-
diator cap.
2. INSPECT COOLING SYSTEM FOR LEAKS
(a) Fill the radiator with coolant and attach a radiator cap
tester.(b) Warm up the engine.
(c) Pump it to 1.2 kg/cm
pressure does not drop.
If the pressure drops, check for leaks as the hoses, radiator
or water pump. If no external leaks are found, check the heat-
er core, cylinder block and head.
2
(427–498 psi, 2,942–3,432
1 push/1 second or less
2
2
(8.5 psi, 59 kPa)
2
(17.1 psi, 118 kPa), check that
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