LEXUS SC400 1991 Service Repair Manual

CYLINDER BLOCK
COMPONENTS FOR REMOVAL AND
INSTALLATION OF ENGINE WITH
TRANSMISSION
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COMPONENTS FOR REMOVAL AND
INSTALLATION OF ENGINE WITH
TRANSMISSION (Cont'd)
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COMPONENTS FOR REMOVAL AND
INSTALLATION OF ENGINE WITH
TRANSMISSION (Cont'd)
REMOVAL OF ENGINE WITH
TRANSMISSION
1. REMOVE BATTERYCAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is
turned to the ºLOCKº position and the negative (±) termi-
nal cable is disconnected from the battery.
2. REMOVE ENGINE UNDER COVER
3. DRAIN ENGINE COOLANT (See page CO±6)
4. DRAIN ENGINE OIL
5. REMOVE HOOD
6. REMOVE DRIVE BELT Loosen the drive belt tension by turning the drive belt tension-
er counterclockwise, and remove the drive belt.
HINT: The pulley bolt for the belt tensioner has a left±hand
thread.
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7. REMOVE THROTTLE BODY COVER(a) Remove the mounting cap nut.
(b) Loosen the two bolts, and remove the throttle bodycover.
8. DISCONNECT CONTROL CABLES FROM THROTTLE BODY
Disconnect the following cables:(1) Accelerator cable
(2) A/T throttle cable
(3) (w/ Cruise Control System) Cruise control actuator cable
9. REMOVE AIR CLEANER AND AIR FLOW METER (a) Disconnect the air flow meter connector.
(b) Loosen the hose clamp holding the air cleaner hose tothe intake air connector.
(c) Remove the four mounting bolts.
(d) Disconnect the air cleaner hose from the intake air connector.
(e) Disconnect the air duct from the air cleaner case, and remove the air cleaner and air flow meter assembly.
10. D I S C O N N E C T VA CUUM HOSE (A) (FROM PS AIR
CONTROL VALVE) FROM AIR INTAKE CHAMBER
11. REMOVE INTAKE AIR CONNECTOR
(a) Disconnect the following hose:(1) Air hose from ISC valve
(2) Air hose (from PS air control valve) from intake air connector
(b) Remove the bolt holding the intake air connector to the cylinder head cover.
(c) Loosen the hose clamp.
(d) Disconnect the intake air connector from the throttle
body, and remove the intake air connector.
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ENGINE MECHANICAL Cylinder BlockEM±119
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12. REMOVE RADIATOR RESERVOIR TANK(a) Disconnect the coolant level sensor connector.
(b) Disconnect the following hoses:(1) Reservoir hose to water inlet housing
(2) Reservoir hose to radiator
(c) Remove the two bolts and reservoir tank bracket.
(d) Disconnect the reservoir tank from the reservoir tank bracket, and remove the reservoir tank.
13. REMOVE RADIATOR (a) Disconnect the water temperature sensor connector.
(b) Disc onnect the wire clamp (for water temperature
sensor) from the radiator fan shrould.
(c) Disconnect the following hoses: (1) Two oil cooler hoses (for cooling fan) from pipes
(2) Two radiator hoses
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(3) Two oil cooler hoses (for A/T) from radiator Plug thehose ends.
(4) Suction hose from hydraulic pump
(5) Pressure hose from hydraulic pump
(c) Re mo ve th e two bo lts, scre w an d u pper radiator
support. Remove the two upper radiator supports.
(d) Slightly lift the radiator, and d isconnect the two oil cooler
hoses (for cooling fan) from the hose clamp on the
radiator fan shrould.
(e) Remove the radiator.
14. DISCONNECT IGNITER CONNECTORS (a) Disconnect the two igniter connectors.
(b) Disconnect the wire clamp from the body.
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15. DISCONNECT ENGINE WIRE CONNECTORS
16. DISCONNECT THEFT DETERRENT HORN CONNECTOR
17. DISCONNECT GROUND CABLE FROM BODY
18. DISCONNECT PS SOLENOID VALVE CONNECTOR
19. DISCONNECT WIRE CLAMP (FOR ALTERNATOR) FROMVSV (FOR EVAP SYSTEM)
(a) Remove the two bolts, and disconnect the VSV from the
RH cylinder head.
(b) Disconnect the wire clamp from the VSV bracket.
20. REMOVE ALTERNATOR (a) Disconnect the alternator connector.
(b) Remove the cap and nut, and disconnect the alternatorwire.
(c) Remove the mounting bolt and nut.
(d) Disconnect the A/T oil cooler pipe bracket.
(e) Remove the alternator.
21. D I S C O N N E C T P S T U B E S F R O M S U SPENSION
CROSSMEMBER
Remove the clamp bolt, and disconnect the PS tubes.
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22. DISCONNECT PS RESERVOIR TANK AND BRACKET
FROM BODY
Remove the three bolts, and disconnect the reservoir tank
and bracket assembly.
23. DISCONNECT PS PUMP FROM ENGINE Remove the three pump bolts and nut, and disconnect the PS
pump.
HINT: Put aside the PS pump, and suspend it.
24. DISCONNECT A/C COMPRESSOR (a) Disconnect the compressor connector.
(b) Remove the mounting nut, and disconnect the groundcable.
(c) Remove the mounting bolt and compressor stay.
(d) Remove the two mounting bolts, and disconnect the compressor from the engine.
HINT: Put aside the compressor, and suspend it.
25. DISCONNECT HOSES AND GROUND STRAP Disconnect the following hose and ground strap:(1) Heater water hose from water by±pass pipe
(2) Heater water hose from heater water valve
(3) Vacuum hose from brake booster union on air in-
take chamber
(4) Vacuum hose (from VSV for heater water valve)
from air intake chamber
(5) Ground strap from bracket on body
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(6) Two fuel hoses from fuel tubes. Plug the hose end.
26. REMOVE CHARCOAL CANISTER (a) Disconnect the vacuum hose and air hose from thecharcoal canister.
(b) Remove the charcoal canister.
27. DISCONNECT ENGINE WIRE FROM CABIN (a) Remove the two clips, and pull out the instrument panelunder cover.
(b) Remove the four mounting screws.
(c) Disc onnect the connectors, and remove the lower
instrument panel finish panel and glove compartment
door assembly.
(d) Pull out the scuff plate.
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(e) Take out the front side of the floor carpet.
(f) Remove the two nuts and ECU protector.
(g) Remove the nut, and disconnect the engine & ECT ECU
from the floor panel.
(h) Disconnect the following connectors: (1) Two connectors from engine & ECT ECU
(2) Connector from ABS & TRAC ECU
(3) Two connectors from TRAC ECU
(4) Four connectors from connector cassette
(5) Connector from A/C control assembly
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ENGINE MECHANICAL Cylinder BlockEM±125
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