Radiator - Toyota Supra 1990 Manual

COOLING SYSTEM - Radiator
CO-9
C00034
~
C00756
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 care-
ful not to deform the fins of the radiator core. If the clean-
er nozzle pressure is 30 - 35 kgfcm2 (427 - 498 psi,
2,942 - 3,432
I.
keep a distance of at least 40 - 50 cm
(15.75 - 19.69 in.) between the radiator core and clean-
er nozzle.
INSPECTION OF RADIATOR
1. CHECK RADIATOR CAP
2.
Using a radiator cap tester, pump tester until the relief valve
opens. Check that the valve opens between 0.75 kg/cm2
(10.7 psi, 74 kPa) and 1.05 kg/cm2 (14.9 psi, 103 kPa).
Check that the pressure gauge does not drop rapidly when
pressure on the cap is below 0.6 kg/cm2 (8.5 psi,
59 kPa).
If either check is not within limits, replace cap.
CHECK COOLING SYSTEM FOR LEAKS
(a) Fill the radiator with coolant and attach a pressure
tester.
(b) Warm up the engine.
(c) Pump it to 1.2 kg/cm2 (17.1 psi, 118 kPal. check
that pressure does not drop.
If the pressure drops, check for leaks from the hoses, radi-
ator or water pump. If no external leaks are found, check
the heater core, cylinder block and head.
REMOVAL OF RADIATOR
1 .
DRAIN COOLANT
2.
DISCONNECT CONDENSER FAN MOTOR CONNECTOR
3.
DISCONNECT RADIATOR HOSES
4.
DISCONNECT COOLANT RESERVOIR HOSE
5. (A/T)
DISCONNECT AfT COOLER HOSES
HINT:
• Be careful as some oil will leak out. Catch it in a suita-
ble container.
• Plug the pipe to prevent oil from escaping.
6. REMOVE RADIATOR SUPPORTS AND RADIATOR
7. REMOVE CONDENSER FAN MOTORS