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Lexus SC300 / Lexus SC400. Manual - part 551

INSTALL EXHAUST FRONT PIPE

(a)  Install new gaskets.
(b)  Install the front pipe.
(c)  Install and torque the 4 bolts and new nuts.

Torque: 43 N

⋅

m (440 kgf

⋅

cm, 32 ft

⋅

lbf)

(d) Connect both oxygen sensor with heat insulator.

HINT: When connecting the oxygen sensor, turn it clockwise
about 3 times.
NOTICE: After installing the oxygen sensor, check that
the wire is not twisted.

(e) Tighten the oxygen sensors.

Torque: 44 N

⋅

m (450 kgf

⋅

cm, 33 ft

⋅

lbf)

(f) Connect the oxygen sensor grommets to the floor.

–

PROPELLER SHAFT

PROPELLER SHAFT

PR–31

JOINT ANGLE INSPECTION AND
ADJUSTMENT

PR034–02

NOTICE: When performing operations which involve the
removal and installation of the propeller shaft, always
check the joint.
Make adjustments if necessary.

STABILIZE PROPELLER SHAFT AND DIFFERENTIAL

(a) Turn the propeller shaft several times by hand to stabilize the

center support bearing and flexible couplings.

(b) Using a jack, raise and lower the differential to stabilize the

differential mounting cushion.

CHECK JOINT ANGLE OF NO.2 JOINT AND NO.3 JOINT

(a) Using

SST,

measure the installation angle of the intermediate

shaft and propeller shaft.
SST 09370–50010
HINT: The SST should be directly underneath the tube.

(b) Using SST, measure the installation angle of the differential.

SST 09370–50010
HINT: Measure the installation angle by placing the SST in
the position, as shown in the illustration.

PR–32

–

PROPELLER SHAFT

PROPELLER SHAFT

No.2 joint angle:

A – B = – 1

’

A: Intermediate shaft installation angle

B: Propeller shaft installation angle

(d) Calculate the No.3 joint angle.

No.3 joint angle:

B – C = 54

’

B: Propeller shaft installation angle

C: Differential installation angle

If the measure angle is not within the specification, adjust it
with the center support bearing adjusting washer, differential
mount upper stopper and adjusting shim.

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Thickness
mm (in.)

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Remarks

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Center support

bearing

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Adjusting
washer

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2.0 (0.079)
4.0 (0.157)
6.0 (0.236)
8.5 (0.335)

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Left and right washers should be the same thickness.
2 washers should not be assembled together.
Standard parts are used 6.0 mm (0.236 in.) washers.

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Set bolt

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40.0 (1.575)

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Mount upper
stopper

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2.3 (0.091)
2.8 (0.110)

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When the vehicle is new a 2.8 mm (0.110 in.)
stopper used in assembly.

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Differential

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Adjusting shim

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1.0 (0.039)
1.6 (0.063)
2.0 (0.079)

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Left and right washers should be the same thickness.
This shim is installed on top of the mount upper
stopper and is used for adjustment.

–

PROPELLER SHAFT

PROPELLER SHAFT

PR–33

ADJUSTMENT CHART

PR035–02

HOW TO READ THIS CHART
Take measurements, then calculate the No.2 and No. 3 joint
angle.
Mark the calculated values on the chart and read the coordi-
nates.
Replace the adjusting washer, shim and mount upper stop-
per in accordance with the coordinates read and adjust the
joint angles.

Example

Measurements (Installation angle):

Intermediate shaft 2

’

Propeller shaft 2

’

Differential 2

’

Joint angle:

NO.2 2

’

– 2

’

= – 16

’

NO.3 2

’

– 2

’

= 24

’

Adjustment:

Center support bearing

Standard parts 6.0 mm (0.236 in.) –2.5 mm (0.098 in) =

3.5 mm (0.138 in.)

Use adjusting washers which are 2.0 mm (0.079 in.)

thicker.

Differential

Use adjusting shims which are 1.0 mm (0.039 in.)

thicker.

HINT:

•

Maintain the same thickness for the adjusting washers
and adjusting shims on both the left and right sides.

•

If a washer, stopper and shim of the exact thickness are
not available, use the parts which are nearest in
thickness.

NOTICE: Check the joint angle once again after making
the adjustment.

PR–34

–

PROPELLER SHAFT

PROPELLER SHAFT

Content .. 549 550 551 552 ..