Page 2393 of 4770
CO03J±03
P13255
CO0601
Z10579
10 mm
± COOLING (1MZ±FE)THERMOSTAT
CO±11
1619 Author: Date:
INSPECTION
INSPECT THERMOSTAT
HINT:
The thermostat is numbered with the valve opening tempera-
ture.
(a) Immerse the thermostat in water and gradually heat the
water.
(b) Check the valve opening temperature.
Valve opening temperature: 80 ± 84°C (176 ± 183°F)
If the valve opening temperature is not as specified, replace the
thermostat.
(c) Check the valve lift.
Valve lift: 10.0 mm (0.394 in.) or more at 95°C (203°F)
If the valve lift is not as specified, replace the thermostat.
(d) Check that the valve is fully closed when the thermostat
is at low temperatures (below 40°C (104°F)).
If not closed, replace the thermostat.
Page 2394 of 4770

CO03K±03
S04532
Jiggle Valve
Stud Bolt15°15° CO±12
± COOLING (1MZ±FE)THERMOSTAT
1620 Author: Date:
INSTALLATION
1. PLACE THERMOSTAT IN WATER PUMP
(a) Install a new gasket on to the thermostat.
(b) Align the thermostat jiggle valve with the upper stud bolt,
and insert the thermostat in the water inlet housing.
HINT:
The jiggle valve may be set within 15° of either side of the pre-
scribed position.
2. INSTALL WATER INLET
Install the water inlet with the 3 nuts.
Torque: 8 N´m (80 kgf´cm, 69 in.´lbf)
3. INSTALL WATER INLET PIPE
(a) Install a new O±ring to the water inlet pipe.
(b) Apply soapy water to the O±ring.
(c) Connect the water inlet pipe to the water inlet.
(d) Install the bolt holding the water inlet pipe to the cylinder
head.
Torque: 19.5 N´m (200 kgf´cm, 14 ft´lbf)
4. INSTALL ENGINE WIRE PROTECTOR
5. CONNECT NO.2 ECT SWITCH CONNECTOR
6. REINSTALL AIR FILTER AND AIR CLEANER CAP
ASSEMBLY
7. FILL WITH ENGINE COOLANT
8. START ENGINE AND CHECK FOR LEAKS
9. RECHECK ENGINE COOLANT LEVEL
Page 2395 of 4770
CO03L±03
± COOLING (1MZ±FE)RADIATOR
CO±13
1621 Author: Date:
RADIATOR
ON±VEHICLE CLEANING
Using water or a steam cleaner, remove any mud or dirt from the radiator core.
NOTICE:
If using a high pressure type cleaner, be careful not to deform the fins of the radiator core. (i.e. Main-
tain a distance between the cleaner nozzle and radiator core)
Page 2396 of 4770

CO03M±03
Z00570
Radiator Cap Tester
30° or More
Radiator Cap
CO±14
± COOLING (1MZ±FE)RADIATOR
1622 Author: Date:
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 blow out under pressure.
2. INSPECT RADIATOR CAP
NOTICE:
If the radiator cap has contaminations, always rinse
it with water.
When performing steps (a) and (b) below, keep the ra-
diator cap tester at an angle of over 30° above the hor-
izontal.
Before using a radiator cap tester, wet the relief valve
and pressure valve with engine coolant or water.
(a) Using a radiator cap tester, slowly pump the tester and
check that air is coming from the vacuum valve.
Pump speed: 1 push/(3 seconds or more)
NOTICE:
Push the pump at a constant speed.
If air is not coming from the vacuum valve, replace the radiator
cap.
(b) Pump the tester and measure the relief valve opening
pressure.
Pump speed: 1 push within 1 second
NOTICE:
This pump speed is for the first pump only (in order to close
the vacuum valve). After this, the pump speed can be re-
duced.
Standard opening pressure:
83 ± 113 kPa (0.85 ± 1.15 kgf/cm
2, 12.1 ± 16.4 psi)
Minimum opening pressure:
69 kPa (0.7 kgf/cm
2, 10.0 psi)
HINT:
Use the tester's maximum reading as the opening pressure.
If the opening pressure is less than minimum, replace the radia-
tor cap.
Page 2397 of 4770
P13014
Radiator Cap
Tester
± COOLING (1MZ±FE)RADIATOR
CO±15
1623 Author: Date:
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 127 kPa (1.3 kgf/cm
2, 18.5 psi), and check that
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,
cylinder block and cylinder head.
4. REINSTALL RADIATOR CAP
Page 2398 of 4770
CO03N±03
B06399
Radiator
No.1 ECT Switch
No.2 Cooling Fan Connector
Upper Radiator Support Upper Radiator Hose
No.1 Cooling Fan Connector
No.1 ECT Switch Wire Connector Radiator Assembly
Lower Radiator
Support O±Ring
A/T Oil Cooler Hose
Relay Block
(for Daytime Running Light System) No.1 ECT Switch Wire No.1 Cooling FanNo.2 Cooling Fan
Upper Radiator Support
Lower Radiator
Support
Non±reusable part O±Ring Drain PlugLower
Radiator
Hose A/T Oil Cooler Hose
Lower Radiator Hose CO±16
± COOLING (1MZ±FE)RADIATOR
1624 Author: Date:
COMPONENTS
Page 2399 of 4770
S04606
Upper Tank
Lower Tank O±Ring
Cushion
CoreOil Cooler
Inlet Pipe
Plate Washer
Nut A/T
Non±reusable part O±Ring
O±Ring
± COOLING (1MZ±FE)RADIATOR
CO±17
1625 Author: Date:
Page 2400 of 4770

CO03O±03
S04725
B05937
Lower
Hose
Oil
Cooler
Hose
CO±18
± COOLING (1MZ±FE)RADIATOR
1626 Author: Date:
REMOVAL
HINT:
At the time of installation, please refer to the following
items.
Start the engine, and check for coolant and A/T fluid
leaks.
Check the A/T fluid level. (See page DI±438)
1. DRAIN ENGINE COOLANT
2. CANADA:
DISCONNECT RELAY BLOCK (FOR DAYTIME
RUNNING LIGHT SYSTEM) FROM BATTERY
HOLD±DOWN CLAMP
3. DISCONNECT UPPER RADIATOR HOSE FROM
RADIATOR
4. DISCONNECT LOWER RADIATOR HOSE FROM
WATER INLET PIPE
5. DISCONNECT A/T OIL COOLER HOSES FROM OIL
COOLER PIPES
6. DISCONNECT NO.1 AND NO.2 COOLING FAN
CONNECTORS
7. DISCONNECT NO.1 ECT SWITCH WIRE CONNECTOR
8. REMOVE RADIATOR AND COOLING FANS
ASSEMBLY
(a) Remove the 2 bolts and 2 upper supports.
Torque: 12.8 N´m (130 kgf´cm, 9 ft´lbf)
(b) Lift out the radiator, and remove the radiator and cooling
fans assembly.
(c) Remove the 2 lower supports.
9. REMOVE A/T OIL COOLER HOSES FROM
RADIATOR
10. REMOVE LOWER RADIATOR HOSE FROM
RADIATOR