cylinder head LEXUS LS430 2003 Factory Owner's Manual

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.

Fig. 106: Identifying Cylinder Head Bolt Into Portion A
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Lift the cylinder head from the dowels on the cylinder block, and place the cylinder head on
wooden blocks on a bench.
HINT:
If the cylinder head cannot be removed, pry between the cylinder head and cylinder block with a
screwdriver.

Fig. 107: Lifting Cylinder Head From Dowels
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
32.REMOVE CYLINDER HEAD LH
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. 108: Identifying Cylinder Head LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 109: Identifying Cylinder Head Bolt Into Portion A
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Lift the cylinder head from the dowels on the cylinder block, and place the cylinder head on
wooden blocks on a bench.
HINT:
If the cylinder head cannot be removed, pry between the cylinder head and cylinder block with a
screwdriver.

Fig. 110: Lifting Cylinder Head From Dowels
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
33.REMOVE WATER PUMP ASSY
a. Remove the 5 bolts, 2 stud bolts and nut, water pump and gasket.
34.REMOVE OIL PAN SUB-ASSY NO.2 (See REPLACEMENT
)
35.REMOVE OIL PAN BAFFLE PLATE
a. Remove the 3 bolts, 2 nuts and baffle plate.
36.REMOVE OIL PAN SUB-ASSY (See REPLACEMENT
)
37.REMOVE OIL STRAINER SUB-ASSY
a. Remove the bolt, 2 nuts, oil strainer and gasket.
38.REMOVE OIL PUMP ASSY (See REPLACEMENT
)
39.REMOVE ENGINE REAR OIL SEAL RETAINER
a. Remove the 7 bolts.
b. Using a screwdriver, remove the oil seal retainer by prying the portions between the oil seal
retainer and crankshaft bearing cap.
c. Remove the O-ring.

Fig. 111: Removing Engine Rear Oil Seal Retainer Using Screwdriver
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
40.REMOVE SPARK PLUG TUBE GASKET
a. Bend the 4 ventilation case claws installed on the cylinder head cover to an angle of 90° or more.
b. Using a screwdriver, pry out the gasket.
HINT:
Tape the screwdriver tip before use.