Toyota T100 1996 Service Manual page 1117

Radiator Cap Tester
Radiator Cap
1996 TOYOTA T100 (RM449U)
COOLING (5VZ−FE) − RADIATOR
ON−VEHICLE INSPECTION
1. REMOVE RADIATOR CAP
CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot, as fluid
and steam can be blown out under pressure.
2. INSPECT RADIATOR CAP
NOTICE:
If the radiator cap has contaminations, always rinse it with
water.
Using a radiator cap tester, pump the tester and measure the
relief valve opening pressure.
Standard opening pressure:
74 − 103 kPa
(0.75 − 1.05 kgf/cm
Minimum opening pressure:
59 kPa (0.6 kgf/cm
HINT:
Use the tester's maximum reading as the opening pressure.
Z02362
If the opening pressure is less than minimum, replace the radia-
tor cap.
3. INSPECT COOLING SYSTEM FOR LEAKS
(a) Fill the radiator with coolant and attach a radiator cap tes-
ter.
(b) Warm up the engine.
(c) Pump it to 118 kPa (1.2 kgf/cm
the pressure does not drop.
If the pressure drops, check the hoses, radiator or water pump
for leaks. If no external leaks are found, check the heater core,
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cylinder block and head.
4. REINSTALL RADIATOR CAP
2
, 10.7 − 14.9 psi)
2
, 8.5 psi)
2
, 17.1 psi), and check that
CO−13
CO05Z−03