Lexus SC300 / Lexus SC400. Manual - part 592

INSTALLATION OF ENGINE

(See Components on pages 

EM–116

 to 118)

1.  INSTALL ENGINE AND TRANSMISSION ASSEMBLY IN

VEHICLE
(a)  Attach the engine hoist chain to the engine hangers.
(b)  Lower the engine and transmission assembly into the

engine compartment.

CAUTION: Be careful not to hit the PS gear housing or
neutral start 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 four

bolts and four nuts with the front mark facing forward.
Install the ground strap.

Torque: Nut 13 N

⋅

m (135 kgf

⋅

cm, 10 ft

⋅

lbf)

Bolt 25 N

⋅

m (260 kgf

⋅

cm, 19 ft

⋅

lbf)

(f)  Install the two nuts holding the engine mounting

brackets to the front suspension crossmember.

Torque: 59 N

⋅

m (600 kgf

⋅

cm, 43 ft

⋅

lbf)

3. 

CONNECT TRANSMISSION CONTROL ROD
Connect the control rod to the shift lever with the nut.

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ENGINE MECHANICAL

Cylinder Block

EM–167

4. 

INSTALL PROPELLER SHAFT
(See PR section)

5. 

INSTALL CENTER FLOOR BRACE
Install the brace with the four nuts.

Torque: 13 N

⋅

m (130 kgf

⋅

cm, 9 ft

⋅

lbf)

6. 

INSTALL EXHAUST PIPE HEAT INSULATOR
Install the heat insulator with the four nuts.

7. 

INSTALL CENTER EXHAUST PIPE
Install the two hooks of the exhaust pipe to the rings on the
exhaust pipe brackets.

8. INSTALL 

TAILPIPE

(a)  Install the tailpipe hook to the ring on the tailpipe

brackets.

(b)  Install a new gasket and the tailpipe to the center

exhaust pipe with the two bolts. Install the two tailpipe.

Torque: 19 N

⋅

m (195 kgf

⋅

cm, 14 ft

⋅

lbf)

EM–168

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ENGINE MECHANICAL

Cylinder Block

9. 

INSTALL CATALYTIC CONVERTERS (MAIN)
Install a new gasket and the catalytic converter with three
new nuts. Install the two catalytic converters.

Torque: 62 N

⋅

m (630 kgf

⋅

cm, 46 ft

⋅

lbf)

10.  INSTALL FRONT EXHAUST PIPE

(a)  Temporarily install the pipe support stay with the four

bolts.

(b)  Install three new gaskets, the exhaust pipe and pipe

support stay with the six bolts and nuts.

Torque: 43 N

⋅

m (440 kgf

⋅

cm, 32 ft

⋅

lbf)

(c)  Tighten the four bolts holding the pipe support bracket

to the transmission.

Torque: 43 N

⋅

m (440 kgf

⋅

cm, 32 ft

⋅

lbf)

(d)  Install the two sub–oxygen sensors to the exhaust pipe.

Torque: 44 N

⋅

m (450 kgf

⋅

cm, 33 ft

⋅

lbf)

HINT:

•

Before installing the sub–oxygen sensor, twist the
sensor wire counterclockwise 3 1/2 turns.

•

After installing the sub–oxygen sensor, check that the
sensor wire is not twisted. If it is twisted, remove the
sub–oxygen sensor and reinstall it.

(e)  Install the wire grommets to the floor.

11.  CONNECT ENGINE WIRE TO CABIN

(a)  Push in the engine wire through the cowl panel.

(b)  Install the engine wire clamp with the three bolts.

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ENGINE MECHANICAL

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EM–169

 (c)  Connect the following connectors:

(1)  Two connectors to engine & ECT ECU
(2)  Connectors to ABS & TRAC ECU
(3)  Two connectors to TRAC ECU
(4)  Four connectors to connector cassette
(5)  Connector to A/C control assembly

(d)  Install the engine & ECT ECU with the nut.

(e)  Install the ECU protector with the two nuts.
(f)  Install the floor carpet.

EM–170

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ENGINE MECHANICAL

Cylinder Block