2003 LEXUS LS430 exhaust manifold

Fig. 57: Identifying White Mark
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Install the exhaust manifold with 8 new nuts. Uniformly tighten the nuts in several passes.
Torque: 44 N.m (449 kgf.cm, 32 ft.lbf)

Fig. 58: Installing Exhaust Manifold
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
85.INSTALL EXHAUST MANIFOLD HEAT INSULATOR NO.1
86.INSTALL ENGINE OIL LEVEL SENSOR
87.INSTALL CRANKSHAFT POSITION SENSOR (See REPLACEMENT
)
88.INSTALL OIL FILTER BRACKET SUB-ASSY
Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)
89.INSTALL IGNITION COIL ASSY
Torque: 7.5 N.m (77 kgf.cm, 66 in.lbf)
90.INSTALL ENGINE HANGER NO.2
Torque: 37 N.m (377 kgf.cm, 27 ft.lbf)
91.INSTALL ENGINE HANGER NO. 1
Torque: 37 N.m (377 kgf.cm, 27 ft.lbf)
92.INSTALL KNOCK SENSOR
a. Install the 2 knock sensors with the 2 nuts, as shown in the illustration.
Torque: 20 N.m (204 kgf.cm, 15 ft.lbf)
b. Connect the 2 knock sensor connectors.

block and the manifolds for warpage.
MAXIMUM WARPAGE:
CYLINDER BLOCK CONTACTING SURFACE SPECIFICATIONS
If the warpage is greater than the maximum, replace the cylinder head.
Fig. 321: Inspecting Cylinder Head For Cracks

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Inspect the cylinder head for cracks.
1. Using a dye penetrant, check the combustion chamber, intake ports, exhaust ports and cylinder
block surface for cracks.
If cracked, replace the c
ylinder head.
ItemSpecified Condition
Cylinder block surface0.05 mm (0.0020 in.)
Intake manifold surface0.10 mm (0.0039 in.)
Exhaust manifold surface0.10 mm (0.0039 in.)