Page 545 of 1807

Z00570
Radiator Cap Tester
30° or More
Radiator Cap
P11504
CO08U-01
CO-18
- COOLINGRADIATOR
1431 Author: Date:
1997 SUPRA (RM502U)
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 blown 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 pump tester at an angle of over 30° above the
horizontal.
(a) Before using a radiator cap tester, wet the relief valve and
pressure valve with engine coolant or water.
(b) 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.
(c) 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:
93 - 123 kPa (0.95 - 1.25 kgf/cm
2, 13.5 - 17.8 psi)
Minimum opening pressure:
78 kPa (0.8 kgf/cm
2, 11.4 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.
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 147 kPa (1.5 kgf/cm
2, 21.3 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 546 of 1807
CO08V-02
- COOLINGRADIATOR
CO-19
1432 Author: Date:
1997 SUPRA (RM502U)
COMPONENTS
Page 547 of 1807
S04927
Air Cleaner Duct
Upper Radiator Hose
Hold-Down
Clamp Radiator
Cap
Battery Insulator
Battery Lower Radiator Hose
Oil Cooler Hose (A/T)
Upper Radiator
Support
Radiator
Assembly
O-Ring
No.2 Fan ShroudBattery Tray
Engine Under Cover x 16 Electric Cooling
Fan Connector
Drain Plug Radiator Reservoir
Hose
No.5 Air Hose
No.2 Air Tube
ECT Switch (for Electric
Cooling Fan) Connector
Radiator
Non-reusable partNo.1 Fan Shroud Clip Lower
Radiator
Support 2JZ-GTE
Drain HoseECT Switch (for Electric Cooling Fan)
O-Ring Electric Cooling FanLH Headlight Beam Angle Gauge CO-20
- COOLINGRADIATOR
1433 Author: Date:
1997 SUPRA (RM502U)
Page 548 of 1807
P12141
Upper Tank
O-Ring
Cushion
Lower Tank
Oil CoolerRadiator Cap
Core
Lower TankInlet PipeDrain Plug
O-Ring A / T O-Ring
O-Ring
Non-reusable part
- COOLINGRADIATOR
CO-21
1434 Author: Date:
1997 SUPRA (RM502U)
Page 549 of 1807
CO0ZZ-01
P12769
PryClip Pull
Disconnect
P12217
P13162
(2)
(1)
P11646
Plug
(4)(3) CO-22
- COOLINGRADIATOR
1435 Author: Date:
1997 SUPRA (RM502U)
REMOVAL
1. REMOVE ENGINE UNDER COVER
HINT:
Start the engine, and check for coolant and A/T fluid leaks.
2. REMOVE BATTERY AND BATTERY TRAY
3. DRAIN ENGINE COOLANT
4. 2JZ-GTE:
REMOVE NO.2 AIR TUBE
5. REMOVE NO.2 FAN SHROUD
(a) Remove the 2 clips.
(b) Disconnect the claw of the No.2 fan shroud from the hook
of the No.1 fan shroud, and remove the No.2 fan shroud.
6. REMOVE AIR CLEANER DUCT
7. 2JZ-GTE:
REMOVE NO.5 AIR HOSE
8. REMOVE LH HEADLIGHT BEAM ANGLE GAUGE
Remove the screw and beam angle gauge.
9. DISCONNECT HOSES FROM RADIATOR
Disconnect these hoses from the radiator:
(1) Reservoir inlet hose
(2) Upper radiator hose
(3) Lower radiator hose
(4) A/T (2 oil cooler hoses):
Plug the hose ends.
HINT:
At the time of installation, please refer to the following items.
Check the A/T fluid level.
Page 550 of 1807

P11908
(A)
Z16741
Drain
Hose
ECT Switch (2JZ-GTE)
S05171
- COOLINGRADIATOR
CO-23
1436 Author: Date:
1997 SUPRA (RM502U)
10. REMOVE RADIATOR ASSEMBLY
(a) 2JZ-GTE:
Disconnect the ECT switch (for electric cooling fan con-
nector) and wire harness.
(b) 2JZ-GTE:
Disconnect the 2 electric cooling fan connectors and wire
harness.
(c) Remove the bolt and upper radiator support. Remove the
2 upper radiator supports.
HINT:
At the time of installation, please refer to the following items.
Check that the rubber cushion (A) of the support is not de-
pressed.
Torque: 15 N´m (155 kgf´cm, 11 ft´lbf)
(d) Lift out the radiator assembly.
(e) Remove the 2 lower radiator supports.
11. REMOVE DRAIN HOSE FROM RADIATOR
12. 2JZ-GTE:
REMOVE ENGINE COOLANT TEMPERATURE (ECT)
SWITCH FROM RADIATOR
(a) Remove the ECT switch.
HINT:
At the time of installation, please refer to the following item.
Apply soapy water to the O-ring, and install the ECT switch.
Torque: 7.4 N´m (75 kgf´cm, 65 in.´lbf)
(b) Remove the O-ring from the ECT switch.
HINT:
At the time of installation, please refer to the following item.
Use a new O-ring.
13. REMOVE NO.1 FAN SHROUD FROM RADIATOR
(a) 2JZ-GE:
Remove the 4 bolts and No.1 fan shroud.
(b) 2JZ-GTE:
Remove the 5 bolts and No.1 fan shroud.
Page 551 of 1807

P02651Stopper BoltSST
Lock
Plate
CO1205Overhaul Handle Dimension º B º
SSTPart º A º
ClawStopper Bolt
CO08X-01
P11773
Lightly
Ta p
Z16737
Inlet Pipe A/T CO-24
- COOLINGRADIATOR
1437 Author: Date:
1997 SUPRA (RM502U)
DISASSEMBLY
1. REMOVE CUSHIONS FROM RADIATOR
2. ASSEMBLE SST
SST 09230-01010
(a) Install the claw to the overhaul handle, inserting it in the
hole in part ºAº as shown in the installation.
(b) While gripping the handle, adjust the stopper bolt so that
dimension ºBº shown in the diagram is 0.2 - 0.5 mm
(0.008 - 0.020 in.).
NOTICE:
If this adjustment is not done, the claw may be damaged.
3. UNCAULK LOCK PLATES
Using SST to release the caulking, squeeze the handle until
stopped by the stopper bolt.
SST 09230-01010
4. REMOVE TANKS AND O-RINGS
(a) Lightly tap the radiator hose inlet (or outlet) with a soft-
faced hammer and remove the tank.
(b) Remove the O-ring.
5. A/T:
REMOVE OIL COOLER FROM LOWER TANK
(a) Remove the inlet pipes.
HINT:
Make a note of the direction to face the pipes.
(b) Remove the nuts, plate washers and oil cooler.
(c) Remove the O-rings from the oil cooler.
Page 552 of 1807

CO08Y-02
Z16734
A/T
(1)
(2)(4)
(3)(5)(6)
Z16738
A/T
(6)
CO1267
Lock Plate
Lock Plate
Core
CO0317
O-RingO Normal
X Twisted X Twisted
P10899
CORRECT
Tank
WRONGLock
Plate
- COOLINGRADIATOR
CO-25
1438 Author: Date:
1997 SUPRA (RM502U)
REASSEMBLY
1. A/T:
INSTALL OIL COOLER TO LOWER TANK
(a) Clean the O-ring contact surface of the lower tank and oil
cooler.
(b) Install new O-rings (1) to the oil cooler (2).
(c) Install the oil cooler (2) to the lower tank (3).
(d) Install the plate washers (4), and nuts (5).
Torque: 8.3 N´m (85 kgf´cm, 74 in.´lbf)
(e) Install the inlet pipes (6).
Torque: 15 N´m (150 kgf´cm, 11 ft´lbf)
HINT:
Face the inlet pipes in the same direction they were before dis-
assembly.
2. INSPECT LOCK PLATE
Inspect the lock plate for damage.
HINT:
If the sides of the lock plate groove are deformed, reas-
sembly of the tank will be impossible.
Therefore, first correct any deformation with pliers or simi-
lar object. Water leakage will result if the bottom of the
lock plate groove is damaged or dented. Therefore, repair
or replace if necessary.
NOTICE:
The radiator can only be recaulked 2 times.
After the 2nd time, the radiator core must be replaced.
3. INSTALL NEW O-RINGS AND TANKS
(a) After checking that there are no foreign objects in the lock
plate groove, install the new O-ring without twisting it.
HINT:
When cleaning the lock plate groove, lightly rub it with sand pa-
per without scratching it.
(b) Install the tank without damaging the O-ring.
(c) Tap the lock plate with a soft-faced hammer so that there
is no gap between it and the tank.