Toyota 22R-E - Page 546

RADIATOR INSPECTION
1. CHECK RADIATOR CAP
(a) Using radiator cap tester, pump the tester until relief
valve opens. Check that the valve opens between 74
kPa (0.75 kgf/cm
2
, 10.7 psi) and 103 kPa (1.05 kgf/
cm
2
, 14.9 psi).
(b) Check that pressure gauge does not drop rapidly
when pressure on cap is below 59 kPa (0.6 kgf/cm
2
,
8.5 psi).
If either check is not within limit, replace the radiator
cap.
RADIATOR
RADIATOR CLEANING
Using water or a steam cleaner, remove mud and dirt
from the radiator core.
NOTICE: If using a high–pressure type cleaner, be car–
eful not to deform the fins of the radiator core. For
example, keep a distance of more than 40 – 50 cm
(15.75 – 19.69 in.) between the radiator core and cleaner
nozzle when the cleaner nozzle pressure is 2,942 – 3,432
kPa (30 – 35 kgf/cm
2
, 427 – 498 psi).
2. CHECK COOLING SYSTEM FOR LEAKS
(a) Fill the radiator with engine coolant and attach a
radiator cap tester.
(b) Warm up the engine.
(c) Pump it to 118 kPa (1.2 kgf/cm
2
, 17.1 psi), and check
that the pressure does not drop.
If the pressure drops, check for leaks from the hoses,
radiator or water pump. If no external leaks are found,
check the heater core, block and intake manifold.
–ENGINE COOLING SYSTEM
EG2–269