2003 LEXUS LS430 cylinder head

Fig. 263: Applying Seal Packing To Housing Plug
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Apply engine oil to the cam and gear of the camshaft and also the journal of the cylinder head.
b. Align the timing marks (2 dot marks each) of the camshaft drive and driven main gears, and place
the intake and exhaust camshafts.
c. Set the timing mark (2 dot marks each) of the camshaft drive and driven main gears at an angle of
approximatel
y 10°.

Fig. 265: Applying Seal Packing To Front Bearing Cap
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
e. Install the camshaft housing plug to the cylinder head as shown in the illustration.
f. Install the oil control valve filter to the cylinder head.

Fig. 266: Installing Front Bearing Cap
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
g. Apply seal packing to the front bearing cap.
Remove any old packing (FIPG) material and be careful not to drop any oil on the contact
surfaces of the bearing cap and cylinder head.
Using a razor blade and gasket scraper, remove all the old packing (FIPG) material from the
gasket surfaces and groove.
Thoroughly clean all components to remove all loose material.
Using a non-residue solvent, clean both sealing surfaces.
Apply seal packing to the bearing cap as shown in the illustration.
Install a nozzle that has been cut to a 1.5 mm (0.059 in.) opening.
Parts must be assembled within 5 minutes of application. Otherwise the material must be
removed and reapplied.
Immediately remove the nozzle from the tube and reinstall the cap.

Fig. 271: Removing Upper And Lower Intake Manifold Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
13.INSTALL CAMSHAFT TIMING PULLEY SUB-ASSY LH
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 "L" 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 LH (See REPLACEMENT
)
15.INSTALL TIMING BELT (See REPLACEMENT
)
REPLACEMENT

Fig. 274: Removing Cylinder Head Sub-Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
13.REMOVE WATER BYPASS JOINT FR
a. Disconnect the ECT sensor connector.
b. Remove the 4 nuts, water bypass joint and 2 gaskets.
14.REMOVE W/CATALYST CONVERTER ASSY

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. 276: Removing Cylinder Head Gasket
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
d. Uniformly loosen and remove the 10 cylinder head bolts and plate washers in the sequence shown
in the illustration.
e. Remove the cylinder head together with the RH manifold.
16.REMOVE CYLINDER HEAD GASKET

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.