Toyota Corolla 2004 Repair Manual - COOLING FAN SYSTEM
–COOLING COOLING SYSTEM (April, 2003)
COOLING SYSTEM (April, 2003)
ON–VEHICLE INSPECTION
16–1
160NX–02
Radiator Cap Tester
1. INSPECT COOLING SYSTEM FOR LEAKS
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.
(a) Fill the radiator with coolant and attach a radiator cap tes-
ter.
(b) Warm up the engine.
2
A65935
(c) Pump it to 118 kPa (1.2 kgf/cm
, 17.1 psi), and check that
the pressure does not drop.
HINT:
If the pressure drops, check the hoses, radiator or water pump
for leaks. If no external leaks are found, check the heater core,
cylinder block and head.
2. CHECK ENGINE COOLANT LEVEL AT RESERVOIR
(a) The engine coolant level should be between the ”LOW” and ”FULL” line.
HINT:
If low, check for leaks and add ”Toyota Long Life Coolant” or equivalent up to the ”FULL” line.
3. CHECK ENGINE COOLANT QUALITY
(a) Remove the radiator cap.
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.
(b) Check if ther e i s any excessive deposits of rust or scale around the radiator cap and radiator filler hole;
the coolant should be free from oil.
HINT:
If excessively dirty, replace the coolant.
(c) Reinstall the radiator cap.
2004 COROLLA (RM1037U)
1183Author: Date:
16–2
A73603
–COOLING COOLING SYSTEM (April, 2003)
4. INSPECT FINS BLOCKAGE
(a) If fins are clogged, wash them with water or a steam
cleaner and dry with compressed air.
NOTICE:
If the distance between the steam cleaner and core is
too close, there is a possibility of damaging the fins,
so keep the following injection distance.
Injection Pressures
kPa (kgf/cm2, psi)
2,942 to 4,903
(30 to 50, 427 to 711)
4,903 to 7,845
(50 to 80, 711 to 1,138)
If the fins are bent, straighten them with a screwdriver
Injection Distance
mm (in.)
300 (11.811)
500 (19.685)
or pliers.
Be careful not pour water directly onto electronic
components.
2004 COROLLA (RM1037U)
1184Author: Date:
Loading...