1986 TOYOTA SUPRA Service Repair Manual

WATER PUMP REMOVAL
1. 2JZ±GTE:
REMOVE NO.1 AIR HOSE
2. 2JZ±GE:
REMOVE AIR CLEANER, VAF METER AND INTAKE AIR
CONNECTOR PIPE ASSEMBLY
(See step 6 in engine removal in Engine Mechanical)
3. 2JZ±GTE:
REMOVE AIR CLEANER AND MAF METER ASSEMBLY
(See step 7 in engine removal in Engine Mechanical)
4. REMOVE RADIATOR ASSEMBLY
(See radiator removal)
5. 2JZ±GTE M/T:
REMOVE DRIVE BELT TENSIONER DAMPER
(See step 2 in timing belt removal in Engine Mechanical)
6. REMOVE DRIVE BELT, FAN, FLUID COUPLING
ASSEMBLY AND WATER PUMP PULLEY
(a) Loosen the 4 nuts holding the fluid coupling to the water
pump.
(b) Loosen the drive belt tension by turning the drive belt
tensioner clockwise, and remove the drive belt.
(c) Remove the 4 nuts, the fan, fluid coupling assembly and
water pump pulley.
7. REMOVE WATER INLET, LOWER RADIATOR HOSE
ASSEMBLY AND THERMOSTAT
(See step 2 to 4 in thermostat removal)
8. REMOVE TIMING BELT
(See steps 4 to 15 in timing belt removal in Engine Me-
chanical)
9. 2JZ±GTE:
REMOVE GENERATOR
(See step 6 in generator removal in Charging System)
10. 2JZ±GE Except California:
REMOVE EXHAUST MANIFOLD HEAT INSULATOR EG±334
± ENGINECOOLING SYSTEM

11. 2JZ±GTE:
DISCONNECT TURBO WATER HOSES FROM WATER
OUTLET
12. 2JZ±GE:
REMOVE WATER BYPASS OUTLET AND NO.1 WATER
BYPASS PIPE
(a) Remove the 2 bolts, water bypass outlet and No.1 water
bypass pipe.
(b) Remove the 3 O±rings from the water bypass outlet and No.1
water bypass pipe.
13. 2JZ±GTE:
REMOVE WATER OUTLET AND NO.1 WATER BYPASS
PIPE
(a) Disconnect the ECT sensor and sender gauge connectors.
(b) Remove the 2 bolts, water outlet and gasket.
(c) Remove the No.1 water bypass pipe and 2 O±rings.
14. REMOVE IDLER PULLEY
(See steps 16 in timing belt removal in Engine Mechani-
cal)
15. REMOVE WATER PUMP
(a) 2JZ±GE:
Remove the mounting bolt, and disconnect the engine wire
bracket.
(b) 2JZ±GE:
Loosen the generator mounting nut.
(c) 2JZ±GE:
Remove the generator mounting bolt, and disconnect the
generator from the water pump.
± ENGINECOOLING SYSTEMEG±335

(d) Remove the 2 nuts, and disconnect the No.2 water bypass
pipe from the water pump.
(e) 2JZ±GTE:
Disconnect the No.3 turbo water hose from the water pump.
(f) Remove the 6 bolts, water pump and gasket.
(g) Remove the O±ring from the cylinder block.
WATER PUMP COMPONENTS
INSPECTION
1. INSPECT WATER PUMP
Turn the pulley seat, and check that the water pump bearing
is not rough or noisy.
If necessary, replace the water pump.
2. INSPECT FLUID COUPLING
(a) Remove the 4 nuts and fan from the fluid coupling. EG±336
± ENGINECOOLING SYSTEM

(b) Check that the fluid coupling is not damaged and that no
silicon oil leaks.
If necessary, replace the fluid coupling.
(c) Reinstall the fan to the fluid coupling with the 4 nuts.
Torque: 7.4 NVm (75 kgfVcm, 65 in.Vlbf)
WATER PUMP INSTALLATION
1. INSTALL WATER PUMP
(a) Install a new O±ring to the cylinder block.
(b) Install a new gasket to the water pump.
(c) Connect the water pump to the water bypass pipe. Do not
install the nut yet.
(d) Install the water pump with the 2 bolts (A) and 4 bolts (B).
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
HINT: Hand tighten the (A) bolts first.
(e) Install the 2 nuts holding the No.2 water bypass pipe to the
water pump.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(f) 2JZ±GTE:
Connect the No.3 turbo water hose to the water pump.
(g) 2JZ±GE:
Install the generator mounting bolt.
Torque: 37 NVm (380 kgfVcm, 27 ftVlbf)
(h) 2JZ±GE:
Tighten the generator mounting nut.
Torque: 37 NVm (380 kgfVcm, 27 ftVlbf)
(i) 2JZ±GE:
Install the engine wire bracket with the bolt.
± ENGINECOOLING SYSTEMEG±337

2. INSTALL IDLER PULLEY
(See step 2 in timing belt installation in Engine Mechani-
cal)
3. 2JZ±GTE:
INSTALL WATER OUTLET AND NO.1 WATER BYPASS
PIPE
(a) Install 2 new O±rings to the No.1 water bypass pipe.
(b) Apply soapy water to the O±rings.
(c) Install the No.1 water pass pipe to the water pump.
(d) Install a new gasket and the water outlet with the 2 bolts.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(e) Connect the ECT sensor and sender gauge connectors.
4. 2JZ±GE:
INSTALL WATER BYPASS OUTLET AND NO.1 WATER
BYPASS PIPE
(a) Install 2 new O±rings to the No.1 water bypass pipe.
(b) Install a new O±ring and the water bypass outlet with the 2
bolts.
Torque: 8.8 NVm (90 kgfVcm, 78 in.Vlbf)
5. 2JZ±GTE:
CONNECT TURBO WATER HOSES TO WATER OUTLET
6. 2JZ±GE Except California:
INSTALL EXHAUST MANIFOLD HEAT INSULATOR
7. 2JZ±GTE:
INSTALL GENERATOR
(See generator installation in Charging System)
8. INSTALL TIMING BELT
(See steps 10 to 14 in timing belt installation in Engine
Mechanical)
9. INSTALL WATER INLET AND LOWER RADIATOR HOSE
ASSEMBLY
(See thermostat installation)
10. INSTALL WATER PUMP PULLEY, FAN, FLUID COUPLING
ASSEMBLY AND DRIVE BELT
(a) Align the matchmarks, and install the water pump pulley, the
fan and fluid coupling assembly with the 4 nuts.
(b) Install the drive belt by turning the drive belt tensioner
clockwise.
(c) Stretch the belt tight, and tighten the 4 nuts.
Torque: 16 NVm (165 kgfVcm, 12 ftVlbf)
EG±338± ENGINECOOLING SYSTEM

11. 2JZ±GTE M/T:
INSTALL DRIVE BELT TENSIONER DAMPER
12. INSTALL RADIATOR ASSEMBLY
(See radiator installation)
13. 2JZ±GE:
INSTALL AIR CLEANER, VAF METER AND INTAKE AIR
CONNECTOR PIPE ASSEMBLY
14. 2JZ±GTE:
INSTALL AIR CLEANER AND MAF METER ASSEMBLY
15. 2JZ±GTE:
INSTALL NO.1 AIR HOSE
16. ROAD TEST VEHICLE
Check for abnormal noise, shock, slippage, correct shift
points and smooth operation.
± ENGINECOOLING SYSTEMEG±339

THERMOSTAT
COMPONENTS FOR REMOVAL AND
INSTALLATION
EG±340± ENGINECOOLING SYSTEM

THERMOSTAT REMOVAL
HINT: Removal of the thermostat would have an adverse ef-
fect, causing a lowering of cooling efficiency.
Do not remove the thermostat, 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 AS-
SEMBLY 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.
THERMOSTAT INSPECTION
INSPECT THERMOSTAT
HINT: The thermostat is numbered with the valve opening
temperature.
(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.
± ENGINECOOLING SYSTEMEG±341