LEXUS LS430 2003 Factory Repair Manual

Fig. 277: Identifying Cylinder Head Sub-Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
17.INSTALL CYLINDER HEAD GASKET
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 "3R" mark is on the RH bank's gasket.

Fig. 278: Tightening Cylinder Head Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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. 279: Identifying Painted Mark
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
e. Install and uniformly tighten the 10 cylinder head bolts, and plate washers in the sequence shown in
the illustration.
Torque: 59 N.m (602 kgf.cm, 44 ft.lbf)

Fig. 280: Installing Gasket To Cylinder Head Cover
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
f. Mark the front of the cylinder head bolt head with paint.
g. Retighten the cylinder head bolts by 90° in the sequence shown.
h. Check that the painted mark is now at a 90° an
gle to the front.

Fig. 281: Installing Water By-Pass Joint FR
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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. 282: Applying Seal Packing To Sealing Groove
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
21.INSTALL WATER INLET HOUSING
a. Install a new O-ring to the inlet housing.
b. Apply soapy water to the O-ring.
c. Apply seal packing to the sealing groove of the inlet housing as shown in the illustration.
Seal packing: Part No. 08826-00100 or equivalent
<002c0051005600570044004f004f00030044000300510052005d005d004f004800030057004b004400570003004b00440056000300450048004800510003004600580057000300570052000300440003001500030057005200030016000300500050000300
0b001300110013001b00030057005200030013001100140015[ in.) opening.
Parts must be assembled within 3 minutes of application. Otherwise the material must be
removed and reapplied.
d. Install the water inlet and housing assy with the 2 bolts. Alternately tighten the bolts.
Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)

Fig. 283: Installing Water By-Pass Joint RR
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
22.INSTALL WATER BYPASS JOINT RR
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)

Fig. 284: Placing Gaskets On Cylinder Heads
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
23.INSTALL INTAKE MANIFOLD ASSY
a. Place 2 new gaskets on the cylinder heads with the white mark facing outward.

Fig. 285: Installing Upper And Lower Intake Manifolds Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Install the upper and lower intake manifolds assembly with the 6 bolts and 4 nuts.
Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)
24.INSTALL FUEL PIPE SUB-ASSY NO.2 (See REPLACEMENT
)
25.INSTALL VACUUM SWITCHING VALVE ASSY
26.INSTALL V-VANK COVER BRACKET NO.4
27.INSTALL V-BANK COVER BRACKET NO.3
28.INSTALL V-BANK COVER BRACKET NO.2
29.INSTALL V-BANK COVER BRACKET NO.1
30.INSTALL THROTTLE BODY ASSY (See REPLACEMENT
)
31.INSTALL CAMSHAFT (See REPLACEMENT
)

REPLACEMENT
1.WORK FOR PREVENTING GASOLINE FROM SPILLING OUT (See PRECAUTION
)
2.REMOVE NO.3 CAMSHAFT SUB-ASSY (See REPLACEMENT
)
3.REMOVE THROTTLE BODY ASSY (See REPLACEMENT
)
4.REMOVE V-BANK COVER BRACKET NO.1
5.REMOVE V-BANK COVER BRACKET NO.2
6.REMOVE V-BANK COVER BRACKET NO.3
7.REMOVE V-VANK COVER BRACKET NO.4
8.REMOVE VACUUM SWITCHING VALVE ASSY
9.DISCONNECT FUEL PIPE SUB-ASSY NO.2 (See REPLACEMENT
)