TOYOTA SUPRA 1997 Service Repair Manual

CO08Q-01
Z16744
2JZ-GE
Z16763
2JZ-GTE CO-14
- COOLINGTHERMOSTAT
1427 Author
: Date
:
1997 SUPRA (RM502U)
REMOVAL
HINT:
Removal of the thermostat would have an adverse effect, caus-
ing a lowering of cooling efficiency. Do not remove the thermo-
stat, even if the engine tends to overheat.
1. 2JZ-GTE:
REMOVE ENGINE UNDER COVER
2. DRAIN ENGINE COOLANT
3. 2JZ-GE:
DISCONNECT WATER INLET FROM WATER PUMP,
AND REMOVE THERMOSTAT
(a) Remove the 2 nuts holding the water inlet to the water
pump, and disconnect the water inlet from the water
pump.
(b) Remove the thermostat.
(c) Remove the gasket from the thermostat.
4. 2JZ-GTE:
REMOVE WATER INLET, LOWER RADIATOR HOSE
ASSEMBLY AND THERMOSTAT
(a) Disconnect the lower radiator hose from the radiator.
(b) Remove the 2 nuts holding the water inlet to the water
pump, and disconnect the water inlet and lower radiator
hose from the water pump.
(c) Remove the thermostat.
(d) Remove the gasket from the thermostat.

CO08R-01
P 1111 6
CO0601
P03242
Valve
Lift
- COOLINGTHERMOSTAT
CO-15
1428 Author
: Date
:
1997 SUPRA (RM502U)
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: 8.5 mm (0.335 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 closed when the thermostat is at
low temperatures (below 40°C (104°F)).
If not closed, replace the thermostat.

CO08S-01
P11770
Jiggle Valve
Protrusion 2JZ-GE
2JZ-GTE CO-16
- COOLINGTHERMOSTAT
1429 Author
: Date
:
1997 SUPRA (RM502U)
INSTALLATION
1. PLACE THERMOSTAT IN WATER INLET
(a) Install a new gasket to the thermostat.
(b) Align the jiggle valve of the thermostat with the protrusion
of the water inlet.
2. INSTALL WATER INLET
(a) Install the water inlet with the 2 nuts.
Torque:
2JZ-GE 8.8 N´m (90 kgf´cm, 78 in.´lbf)
2JZ-GTE 21 N´m (210 kgf´cm, 15 ft´lbf)
(b) 2JZ-GTE:
Connect the lower radiator hose to the radiator.
3. 2JZ-GTE:
INSTALL ENGINE UNDER COVER
4. FILL WITH ENGINE COOLANT
5. START ENGINE AND CHECK FOR COOLANT
LEAKS

CO08T-01
- COOLINGRADIATOR
CO-17
1430 Author
: Date
:
1997 SUPRA (RM502U)
RADIATOR
ON-VEHICLE CLEANING
Using water or a steam cleaner, remove any mud and 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.)

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

CO08V-02
- COOLINGRADIATOR
CO-19
1432 Author
: Date
:
1997 SUPRA (RM502U)
COMPONENTS

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)

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)

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.

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.