2003 LEXUS LS430 cylinder head

Fig. 50: Measuring Surface Cylinder Head
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
73.REMOVE EXHAUST MANIFOLD HEAT INSULATOR NO.2
74.REMOVE EXHAUST MANIFOLD SUB-ASSY LH
a. Remove the 8 nuts, exhaust manifold and
gasket.

Fig. 51: Removing Exhaust Manifold Sub-Assy LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
75.INSPECT EXHAUST MANIFOLD SUB-ASSY LH
a. Using a precision straight edge and feeler gauge, measure the surface contacting the cylinder head
for warpage.
Maximum warpage: 0.50 mm (0.0197 in.)
If the warpa
ge is greater than the maximum, replace the manifold.

Fig. 54: Installing Mounting Bracket And Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
81.INSTALL WIRING HARNESS HEAT INSULATOR NO.2
82.INSTALL EXHAUST MANIFOLD SUB-ASSY LH
a. Place a new gasket on the cylinder head with the white mark facing the manifold side.

Fig. 56: Installing Exhaust Manifold
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
83.INSTALL EXHAUST MANIFOLD HEAT INSULATOR NO.2
84.INSTALL EXHAUST MANIFOLD SUB-ASSY RH
a. Place a new gasket on the cylinder head with the white mark facing the manifold side.

Fig. 62: Identifying Seal Packing
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
101.INSTALL GENERATOR ASSY (See REPLACEMENT
)
102.INSTALL STARTER ASSY (See REPLACEMENT
)
103.INSTALL INTAKE MANIFOLD ASSY
a. Place 2 new gaskets on the cylinder heads with the white mark facing outward.

140.INSTALL ENGINE UNDER COVER NO.2
141.INSTALL ENGINE UNDER COVER NO.1
142.INSTALL FRONT WHEEL
143.INSTALL AIR CLEANER ASSY
144.INSTALL INTAKE AIR CONNECTOR PIPE
145.INSTALL AIR CLEANER INLET NO.1
146.INSTALL V-BANK COVER
147.INSTALL HOOD SUB-ASSY (See ADJUSTMENT
and OVERHAUL )
148.CONNECT BATTERY NEGATIVE TERMINAL
149.ADD AUTOMATIC TRANSMISSION FLUID
150.ADD ENGINE COOLANT (See REPLACEMENT
)
151.ADD ENGINE OIL (See ON
-VEHICLE INSPECTION )
152.ADD POWER STEERING FLUID
153.BLEED POWER STEERING FLUID
154.INSPECT AUTOMATIC TRANSMISSION FLUID (See ADJUSTMENT
)
155.INSPECT ENGINE OIL LEAKS
156.CHECK FOR ENGINE COOLANT LEAKS
157.INSPECT FOR FUEL LEAKS
158.CHECK FOR EXHAUST GAS LEAKS
159.INSPECT AND ADJUST FRONT WHEEL ALIGNMENT
160.INSPECT IGNITION TIMING
161.INSPECT ENGINE IDLE SPEED
162.INSPECT CO/HC
163.ADJUST ENGINE (See INSPECTION
)
164.CHECK ABS SPEED SENSOR SIGNAL (See TEST MODE PROCEDURE
)
OVERHAUL
1.REMOVE SPARK PLUG
2.REMOVE OIL FILLER CAP SUB-ASSY
3.REMOVE CYLINDER HEAD COVER SUB-ASSY LH
a. Remove the 9 bolts, 9 seal washers, cylinder head cover and gasket.
4.REMOVE CYLINDER HEAD COVER SUB-ASSY
a. Remove the 9 bolts, 9 seal washers, c
ylinder head cover and gasket.

Fig. 104: Removing Bearing Cap Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
26.REMOVE SEMICIRCULAR PLUG
27.REMOVE TIMING BELT PLATE RR RH NO.2
a. Remove the 2 bolts and timing belt plate.
28.REMOVE TIMING BELT PLATE RR RH
a. Remove the bolt, stud bolt and timing belt plate.
29.REMOVE TIMING BELT PLATE RR LH NO.2
a. Remove the 2 bolts and timing belt plate.
30.REMOVE TIMING BELT PLATE RR LH
a. Remove the bolt and timing belt plate.
31.REMOVE CYLINDER HEAD SUB-ASSY
a. Uniformly loosen the 10 cylinder head bolts on one side of each cylinder head in several passes in
the sequence shown in the illustration.

Fig. 105: Removing Cylinder Head Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.