1991 LEXUS SC400 engine

ENGINE INSTALLATION
EG2HW±02
(See Components for Engine Removal and Installation)
1. INSTALL ENGINE AND TRANSMISSION ASSEMBLY INVEHICLE
(a) Attach the engine chain hoist to the engine hangers.
(b) Slowly lower the engine and transmission assembly into the engine compartment.
NOTICE: Be careful not to hit the PS gear housing and
PNP switch.
(c) Insert the stud bolts of the front engine mounting brackets into the stud bolt holes of the front suspension crossmember.
(d) Keep the engine level.
(e) Install the rear engine mounting member with the 4 bolts and 4 nuts.
Torque:
25 NVm (250 kgf Vcm, 19 ft Vlbf) for bolt
13 N Vm (135 kgf Vcm, 10 ft Vlbf) for nut
(f) Install the 2 nuts holding the engine mounting brackets to the
front suspension crossmember.
Torque: 59 N Vm (600 kgf Vcm, 43 ft Vlbf)
EG±192±
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2. CONNECT TRANSMISSION CONTROL ROD FROMSHIFT LEVER
Connect the control rod to the shift lever with the nut.
3. INSTALL PROPELLER SHAFT (See page PR±12)
4. INSTALL CENTER FLOOR CROSSMEMBER BRACE Install the crossmember brace with the 4 nuts.
Torque: 13 N Vm (130 kgf Vcm, 9 ft Vlbf)
5. INSTALL HEAT INSULATOR FOR FRONT EXHAUST PIPE
Install the heat insulator with the 4 bolts.
6. INSTALL CENTER EXHAUST PIPE Install the 2 hooks of the exhaust pipe to the rings on the ex-
haust pipe brackets.
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7. INSTALL TAILPIPE
(a) Install the hook of the tailpipe to the ring on the tailpipebracket.
(b) Install a new gasket and tailpipe to the center exhaust pipe with 2 bolts. Install the 2 tailpipes.
Torque: 19 N Vm (195 kgf Vcm, 14 ft Vlbf)
8. INSTALL TWC (FRONT)
Using a 14 mm deep socket wrench, install a new gasket and
the TWC with 3 new nuts. Install the 2 TWC.
Torque: 62 N Vm (630 kgf Vcm, 46 ft Vlbf)
9. INSTALL FRONT EXHAUST PIPE
(a) Temporarily install the pipe support bracket with the 4 bolts.
(b) Temporarily install 3 new gaskets and the exhaust pipe with
the 6 bolts and nuts.
(c) Tighten the 4 bolts and nuts holding the TWC to the front exhaust pipe.
Torque: 43 N Vm (440 kgf Vcm, 32 ft Vlbf)
(d) Tighten the 2 bolts and nuts holding the front exhaust pipe to
the center exhaust pipe.
Torque: 43 N Vm (440 kgf Vcm, 32 ft Vlbf)
(e) Tighten the 4 bolts holding the pipe support bracket to the
transmission.
Torque: 43 N Vm (440 kgf Vcm, 32 ft Vlbf)
10. INSTALL SUB HEATED OXYGEN SENSORS
Install the 2 oxygen sensors to the front exhaust pipe.
Torque: 44 N Vm (450 kgf Vcm, 33 ft Vlbf)
HINT:
w Before installing the oxygen sensor, twist the sensor
wire counterclockwise 3 1/2 turns.
w After installing the oxygen sensor, check that the sensor
wire is not twisted. If it is twisted, remove the oxygen
sensor and reinstall it.
EG±194
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11. CONNECT ENGINE WIRE TO CABIN
(a) Push in the engine wire through the cowl panel.NOTICE: Be careful not to damage the engine wire. Tape
the engine wire.
(b) Install the engine wire retainer with the 3 bolts.
(c) Connect the following connectors: (1) 2 connectors to ECM
(2) Connector to ABS & TRAC ECU
(3) 2 connectors to TRAC ECU
(4) 4 connectors to connector cassette
(5) Connector to A/C control assembly
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(d) Install the ECM with the nut.
(e) Install the ECM protector with the 2 nuts.
(f) Install the floor carpet.
(g) Install the scuff plate.
(h) Connect the connectors.
(i) Install the lower instrument panel finish panel and glovecompartment door assembly with the 4 screws.
(j) Install the instrument panel under cover with the 2 clips.
EG±196
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12. INSTALL CHARCOAL CANISTER
(a) Install the charcoal canister.
(b) Connect the vacuum hose and air hose to the charcoalcanister.
13. CONNECT HOSES Connect the following hoses and ground strap:
(1) Heater water hose to water bypass hose
(2) Heater water hose to heater water valve
(3) Brake booster hose to union on air intake chamber
(4) Vacuum hose (from VSV for heater water valve) to air in-
take chamber
(5) Ground strap to bracket on body
(6) Fuel inlet hose to fuel tube
SST 09278±54012
Torque: 30 N Vm (310 kgf Vcm, 22 ft Vlbf)
HINT: Use a torque wrench with a fulcrum length of 30 cm
(11.81 in.).
(7) Fuel return hose to return pipe
14. INSTALL AIR CONDITIONING (A/C) COMPRESSOR
(a) Install the A/C compressor, compressor stay and ground cable with the nut and 3 bolts.
Torque:
49 NVm (500 kgf Vcm, 36 ft Vlbf) for bolt
29 N Vm (300 kgf Vcm, 22 ft Vlbf) for nut
(b) Connect the A/C compressor connector.
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15. INSTALL POWER STEERING (PS) PUMP
(a) Install the PS pump with the nut and 3 bolts. Alternatelytighten the bolts and nut.
Torque:
39 NVm (400 kgf Vcm, 29 ft Vlbf) for bolt
43 N Vm (440 kgf Vcm, 32 ft Vlbf) for nut
16. INSTALL POWER STEERING (PS) RESERVOIR TANK
AND BRACKET
Install the reservoir tank and bracket assembly with the 3
bolts.
17. INSTALL POWER STEERING (PS) TUBES Install the PS tube clamp with the bolt.
18. INSTALL GENERATOR
(a) Install the generator and transmission oil cooler pipe bracket with the bolt and nut.
Torque: 37 N Vm (380 kgf Vcm, 27 ft Vlbf)
(b) Connect the generator connector.
(c) Connect the generator wire with the nut and cap.
19. INSTALL WIRE CLAMP (FOR GENERATOR) AND VSV
(FOR EVAP)
(a) Install the wire clamp to the VSV bracket.
(b) Install the VSV with the 2 bolts.
EG±198
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20. INSTALL POWER STEERING (PS) SOLENOID VALVECONNECTOR
21. CONNECT ENGINE WIRE CONNECTORS
22. CONNECT THEFT DETERRENT HORN CONNECTOR
23. INSTALL GROUND CABLE TO BODY
24. CONNECT IGNITER CONNECTORS
(a) Connect the 2 igniter connectors HINT: Connect the yellow taped connector to the igniter on
the rear side.
(b) Install the wire clamp.
25. INSTALL RADIATOR ASSEMBLY
(a) Install the 2 lower radiator supports to the radiator.
(b) Place the radiator assembly on the body bracket.
(c) Slightly lift the radiator, and connect the 2 oil cooler hoses (for
cooling fan) to the hose clamp on the radiator fan shroud.
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