LEXUS LS430 2003 Factory Repair Manual

Fig. 237: Installing Front Bearing Cap
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
8. Install the front bearing cap.
HINT:
Installing the front bearing cap will determine the thrust portion of the camshaft.
9. Install the other bearin
g caps in the sequence shown with the arrow mark facing forward.

Fig. 238: Pushing In Camshaft Oil Seal
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10. Push in the camshaft oil seal.

Fig. 239: Identifying Bearing Cap Bolts
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11. Install 4 new seal washers to the bearing cap bolts (1 to 4).
12. Apply a light coat of engine oil on the threads and under the heads of the bearing cap bolts (5 to
22).
13. Install the oil feed pipe with the 22 bearing cap bolts.
14. Uniformly tighten the 22 bearing cap bolts in several passes in the sequence shown in the
illustration.
Torque:
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15[
16 N.m (163 kgf.cm, 12 ft.lbf) for others

Fig. 240: Removing Service Bolt
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15. Remove the service bolt.
12.INSTALL CAMSHAFT TIMING OIL CONTROL VALVE ASSY

Fig. 241: Installing Camshaft Timing Pulley
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13.INSTALL CAMSHAFT TIMING PULLEY
a. Align the camshaft timing tube knock pin with the knock pin groove of the timing pulley.
b. Attach the timing pulley to the camshaft timing tube. Face the timing pulley's "R" mark forward.
c. Hold the hexagon wrench head portion of the camshaft, and install the 4 pulley bolts.
Torque: 7.5 N.m (77 kgf.cm, 66 in..lbf)
14.INSTALL CYLINDER HEAD COVER SUB-ASSY (See REPLACEMENT
)
15.INSTALL TIMING BELT (See REPLACEMENT
)
REPLACEMENT
1.REMOVE TIMING BELT (See REPLACEMENT
)
2.REMOVE CYLINDER HEAD COVER SUB-ASSY LH (See REPLACEMENT
)

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56004c0057004c00520051[
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3.PISTON & VALVE BREAK PREVENT WORK
a. Turn the crankshaft timing pulley counterclockwise by 45° and match the cut part with the
illustrated position.

Fig. 243: Removing Camshaft Timing Pulley Sub-Assy LH
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HINT:
When the No. 1 cylinder is positioned at 45° BTDC, the valve and piston do not interfere with each
other even when the valve is fully open.

Fig. 244: Removing Service Bolt
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4.REMOVE CAMSHAFT TIMING PULLEY SUB-ASSY LH
a. Remove the 4 bolts and timing pulley.
5.REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSY
6.REMOVE NO.3 CAMSHAFT SUB-ASSY

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55[
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a. Bring the service bolt hole of the sub gear upward by turning the hexagon wrench head portion of
the exhaust camshaft with a wrench.
b. Secure the sub gear to the main gear with a service bolt.
RECOMMENDED SERVICE BOLT:
RECOMMENDED SERVICE BOLT
HINT:
When removin
g the camshaft, make sure that the torsional spring force of the sub gear has been
Thread diameter6mm
Thread pitch1.0 mm
Bolt length16 to 20 mm (0.63 to 0.79 in.)

eliminated by the above operation.
Fig. 246: Identifying Bearing Cap Bolts

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c. Set the timing mark (2 dot marks) of the camshaft main gear at an angle of approximately 10° by
turning the hexagon wrench head portion of the exhaust camshaft with a wrench.