Radiator Inspection - Toyota 1 MZ–FE Manual

1MZ–FE ENGINE – COOLING SYSTEM
RADIATOR
RADIATOR CLEANING
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 2,942 – 3,432 kPa (30 – 35 kgf/cm
427 – 498 psi), keep a distance of at least 40 cm (15.75
in.) between the radiator core and cleaner nozzle.

RADIATOR INSPECTION

1. REMOVE RADIATOR CAP FROM WATER OUTLET
CAUTION: To avoid the danger of being burned, do not
remove the radiator cap while the engine and radiator are
still hot, as fluid and steam can be blown out under
pressure.
2. INSPECT RADIATOR CAP
NOTICE: When performing steps (a) and (b) below, keep
the radiator pump tester at an angle of over 302 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:
1 at time
1 push/1 second or less
2nd time or more
Any speed
Standard opening pressure:
83 – 113 kPa
(0.85 – 1.15 kgf/cm
Minimum opening pressure:
69 kPa (0.7 kgf/cm
If the opening pressure is less than minimum, replace
the radiator cap.
2
, 12.1 – 16.4 psi)
2
, 10.0 psi)
EG2–333
2
,