2003 LEXUS LS430 cylinder head

Fig. 292: Identifying Cylinder Head LH
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Fig. 293: Tightening Cylinder Head Bolts
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. 294: Installing 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 in the illustration.
h. Check that the painted mark is now at a 90° angle to the front.

Fig. 295: Identifying Painted Mark
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.
Torque: 6.0 N.m (61 kgf.cm, 53 in..lbf)
l. Install the hose bracket of the EVAP to the cylinder head cover.
m. Install the wire clamp to the bracket on the cylinder head cover.
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 connector.

Fig. 298: Installing Water By-Pass Joint RR
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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.
Install the water inlet and housing assembly with the 2 bolts. Alternately tighten the bolts.
Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)
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)
23.INSTALL INTAKE MANIFOLD ASSY
a. Place 2 new gaskets on the cylinder heads with the white mark facing outward.

Fig. 299: Placing Gaskets On Cylinder Heads
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b. Install the upper and lower intake manifold assembly with the 6 bolts and 4 nuts.
Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)

Fig. 312: Identifying Cylinder Head Assy Components
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OVERHAUL
1.REMOVE VALVE LIFTER
a. Remove the valve lifter and adjusting shim.
HINT:
Arrange the valve lifters and shims in correct order.
2.REMOVE INTAKE VALVE
a. Using SST, compress the compression spring and remove the 2 keepers.
SST 09202-70020 (09202-01010)
b. Remove the spring retainer, compression spring, valve and spring seat.

Fig. 315: Removing Oil Seal Using Needle-Nose Pliers
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5.INSPECT CYLINDER HEAD SUB-ASSY
a. Clean the cylinder head.
1. Using a gasket scraper, remove all the gasket material from the cylinder block contact
surface.