Cleaning Of Radiator; Inspection Of Radiator - Toyota 3b Repair Manual

co-10
COOLING SYSTEM
-
Radiator
RADIATOR
CLEANING OF RADIATOR
Using
water or steam
cleaner, remove any mud and dirt
from the radiator core.
NOTICE:
lf
using
a
high pressure
type cleaner,
be
careful not to deform the fins of the radiator core'
lf
the
cleaner nozzle pressure
is 30
-
35
kg/cm2 (427
-
498
psi, 2,942
-
3,432
kPa)' keep a distance of at least
40
-
5O
cm (15.75
-
19.69
in.) between the radiator
core and cleaner nozzle.
INSPECTION OF RADIATOR
1.
INSPECT RADIATOR CAP OR WATER OUTLET CAP
Using a radiator cap tester, pump the tester
until the relief
valve
opens.
Check
that the valve opens between
O.75
kg/cmz
110.7
psl 74
kPa)
and
1
.05 kg,/cmz
114.9 psi,
1O3 kPa).
Check
that the
pressure does
not drop rapidly
when
pressure on the cap is below
0'6 kg/cm2 (8'5 psi' 59
kPa)'
lf either check is not
within
limits, replace the
cap.
2.
INSPECT COOLING SYSTEM FOR LEAKS
(a)
Fill
the
radiator
with coolant and attach
a
pressure
tester.
(b)
Warm
uP
the engine.
(c)
Pump
it to 1.2kg/cm2
(17 psi, 118
kPa),
check that
pressure does not
droP.
lf
the pressure drops, check
for
leaks
from the
hoses,
radiator
or water
pump.
lf
no external leaks are
found,
check
the
heater core, cylinder block and head.