2003 LEXUS LS430 engine

Fig. 269: Removing Service Bolt
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k. Install 4 new seal washers to the bearing cap bolts (1 to 4).
l. Apply a light coat of engine oil on the threads and under the heads of the bearing cap bolts (5 to
22).
m. Install the oil feed pipe and the 22 bearing cap bolts.
n. Uniformly tighten the 22 bearing cap bolts in several passes in the sequence shown in the
illustration.
Torque:
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15000c[
16 N.m (163 kgf.cm, 12 ft.lbf) for others

Fig. 275: Identifying Cylinder Head Bolts
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15.REMOVE CYLINDER HEAD SUB-ASSY
a. Remove the bolt, and disconnect the wire clamp bracket on the engine wire from the camshaft
bearing cap.
b. Remove the EVAP from the cylinder head cover sub-assy.
c. Remove the 9 bolts, 9 seal washers, c
ylinder head cover sub-assy and gasket.

Fig. 278: Tightening Cylinder Head Bolts
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18.INSTALL CYLINDER HEAD SUB-ASSY
a. Check that the cut part of the crankshaft timing pulley is in the position shown in the illustration,
and that the piston is below the TDC of compression.
b. Install the cylinder head together with the manifold RH to the cylinder block.
c. Apply a light coat of engine oil on the threads and under the head of the cylinder head bolts.
d. Put the washer on the bolt, and insert the bolt with washer into the cylinder head.

Fig. 281: Installing Water By-Pass Joint FR
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i. Install the gasket to the cylinder head cover.
j. Install the seal washer to the bolt.
k. Install the cylinder head cover with the 9 bolts. Uniformly tighten the bolts in several passes. Install
the 2 cylinder head covers.
Torque: 6.0 N.m (61 kgf.cm, 53 in..lbf)
l. Install the wire clamp bracket on the engine wire to the camshaft bearing cap.
19.INSTALL W/CATALYST CONVERTER ASSY
20.INSTALL WATER BYPASS JOINT FR
a. Install 2 new gaskets and the water bypass joint with the 4 nuts. Alternately tighten the nuts.
Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)
b. Connect the ECT sensor connector.

Fig. 291: Removing Cylinder Head Gasket No.2
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17.INSTALL CYLINDER HEAD GASKET NO.2
a. Place a new cylinder head gasket in position on the cylinder block.
b. The rear side of the cylinder head gasket has marks so that the RH and LH banks can be
distinguished. A "3L" mark is on the LH bank's gasket.
18.INSTALL CYLINDER HEAD LH
a. Check that the cut part of the crankshaft timing pulley is in the position shown in the illustration,
and that the piston is below the TDC of compression.
b. Install the cylinder head together with the manifold RH to the cylinder block.
c. Apply a light coat of engine oil on the threads and under the head of the cylinder head bolts.
d. Put the washer on the bolt, and insert the bolt with washer into the c
ylinder head.

Fig. 305: Removing Drive Plate And Ring Gear And The Front Spacer
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b. Remove the 8 mounting bolts, the rear spacer, the drive plate and ring gear and the front spacer.
3.REMOVE ENGINE REAR OIL SEAL
a. Using a knife, cut the oil seal lip.
b. Using a screwdriver with its tip taped, pry out the oil seal.
c. After the removal, check if the crankshaft is not damaged.

Fig. 306: Removing Rear Oil Seal Using Screwdriver
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4.INSTALL ENGINE REAR OIL SEAL
a. Apply MP grease to a new oil seal lip.
b. Using SST and a hammer, tap in the oil seal until its surface is flush with the rear oil seal retainer
edge.

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25.INSTALL VALVE STEM OIL O SEAL OR RING
a. Using SST, push in a new oil seal.
SST 09201-41020
b. Apply a light coat of engine oil on a new oil seal.
Fig. 401: Identifying Oil Seal Using SST

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