LEXUS SC400 1991 Service Repair Manual

(6) Fuel inlet hose from fuel tube
(7) Fuel return hose from return pipe
HINT: Plug the hose ends.
26. REMOVE CHARCOAL CANISTER
(a) Disconnect the vacuum hose and air hose from from the charcoal canister.
(b) Remove the charcoal canister.
27. DISCONNECT ENGINE WIRE FROM CABIN
(a) Remove the 2 clips, and pull out the instrument panel under cover.
(b) Remove the 4 screws.
(c) Disconnect 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 2 nuts and ECM protector.
(g) Remove the nut, and disconnect the ECM from the floorpanel.
(h) Disconnect the following connectors: (1) 2 connectors from ECM
(2) Connector from ABS & TRAC ECU
(3) 2 connectors from TRAC ECU
(4) 4 connectors from connector cassette
(5) Connector from A/C control assembly
EG±146
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(i) Remove the bolt holding the engine wire clamp to the heaterwater valve bracket.
(j) Remove the 2 bolts holding the engine wire clamp to the
body.
(k) Pull out the engine wire from the cabin.
NOTICE: Be careful not to damage the engine wire.
28. DISCONNECT SUB HEATED OXYGEN SENSORS FROM FRONT EXHAUST PIPE
(a) Disconnect the 2 wire grommets from the floor panel.
(b) Disconnect the 2 oxygen sensors from the exhaust pipe.
29. REMOVE FRONT EXHAUST PIPE
(a) Remove the 4 bolts holding the pipe support bracket to the transmission.
(b) Remove the 2 bolts and nuts holding the front exhaust pipe to the center exhaust pipe.
(c) Remove the 4 bolts and nuts holding the front exhaust pipe to the TWC.
(d) Remove the pipe support bracket, front exhaust pipe and 3 gaskets.
30. REMOVE TWC (FRONT) Using a 14 mm deep socket wrench, remove the 3 nuts, TWC
and gasket. Remove the 2 TWC.
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31. REMOVE TAILPIPE
(a) Remove the 4 nuts holding the tailpipes to the center exhaust
pipe.
(b) Disconnect the hook from the ring on tailpipe bracket, and remove the tailpipe and gasket. Remove the 2 tailpipes.
32. REMOVE CENTER EXHAUST PIPE Disconnect the 2 hooks of the exhaust pipe from the rings on
exhaust pipe brackets, and remove the exhaust pipe.
33. REMOVE HEAT INSULATOR FOR FRONT EXHAUST PIPE
Remove the 4 nuts and heat insulator.
34. REMOVE CENTER FLOOR CROSSMEMBER BRACE Remove the 4 bolts and crossmember brace.
35. REMOVE PROPELLER SHAFT (See page PR±6)
EG±148
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36. DISCONNECT TRANSMISSION CONTROL ROD FROMSHIFT LEVER
Remove the nut, and disconnect the control rod from the shift
lever.
37. REMOVE ENGINE AND TRANSMISSION A SSEMBLY
FROM VEHICLE
(a) Attach the engine chain hoist to the engine hangers.
(b) Remove the 2 nuts holding the engine mounting insulators to
the front suspension crossmember.
(c) Remove the 4 bolts, 4 nuts and rear engine m ounting
member. Disconnect the ground strap.
(d) Lift the engine out of the vehicle slowly and carefully. HINT: Make sure the engine is clear of all wirings, hoses and
cables.
NOTICE: Be careful not hit the PS gear housing, PNP switch
and ABS actuator.
(e) Place the engine and transmission assembly onto the stand.
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COMPONENTS FOR ENGINE &
TRANSMISSION SEPERATION AND
ASSEMBLY
EG0BS±0F
ENGINE & TRANSMISSION SEPARATION
EG24X±01
(See Components for Engine & Transmission Separation and
Assembly)
1. REMOVE OIL DIPSTICK GUIDE AND DIPSTICK FOR TRANSMISSION
(a) Remove the bolt.
(b) Pull out the dipstick guide and dipstick from the port of transmission.
(c) Remove the O±ring from the dipstick guide.
2. REMOVE OIL COOLER PIPES FOR TRANSMISSION
(a) Remove the 2 bolts.
(b) Loosen the 2 union nuts, and remove the oil cooler pipes.
EG±150
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3. DISCONNECT ENGINE WIRE
(a) Disconnect the following connector:(1) O/D direct clutch speed sensor connector
(2) No.1 VSS connector for Speedometer
(3) No.2 VSS connector for ECM
(4) PNP switch connector
(5) Solenoid connector
(b) D i s c onnect the 5 wire clamps from the brackets on
transmission.
4. REMOVE TRANSMISSION (See page AT±23)
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COMPONENTS FOR CYLINDER BLOCK
DISASSEMBLY AND ASSEMBLY
EG0BS±0E
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PREPARATION FOR DISASSEMBLY
EG34Y±01
(See Components for Cylinder Block Disassembly and As-sembly)
1. REMOVE DRIVE PLATE Remove the 8 bolts, front spacer drive plate and rear spacer.
2. INSTALL ENGINE TO ENGINE STAND FOR DISASSEMBLY
3. REMOVE TIMING BELT AND PULLEYS (See pages EG±49 to 57)
4. REMOVE CYLINDER HEAD (See pages EG±75 to 93)
5. REMOVE RH ENGINE MOUNTING BRACKET Remove the 4 bolts and mounting bracket.
6. REMOVE LH ENGINE MOUNTING BRACKET
(a) Remove the 4 bolts and mounting bracket.
(b) Remove the bolt, and disconnect the engine wire from the mounting bracket.
7. REMOVE STARTER
(a) Remove the 2 bolts, and disconnect the starter from the cylinder block.
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(b) Disconnect the engine wire clamp from the bracket on thestarter.
(c) Remove the nut, and disconnect the starter wire.
(d) Disconnect the starter connector, and remove the starter.
8. REMOVE KNOCK SENSORS
(a) Disconnect the 2 knock sensor connectors.
(b) Using SST, remove the 2 knock sensors.
SST 09816±30010
9. REMOVE WATER BYPASS PIPE
(a) Remove the 2 bolts.
(b) Pull out the water bypass pipe from the water pump.
(c) Remove the O±ring from the water bypass pipe.
10. REMOVE ENGINE WIRE
(a) Disconnect the following connector: wCrankshaft position sensor connector
w Oil pressure switch connector
w Oil level sensor connector
(b) Remove the 3 bolts and engine wire cover from the LH side of the cylinder block.
(c) Remove the 2 bolts and engine wire.
EG±154
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