2003 LEXUS LS430 Factory Repair Manual

Page 3577 of 4500

LEXUS LS430 2003  Factory Repair Manual 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 ill

Page 3578 of 4500

LEXUS LS430 2003  Factory Repair Manual 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 t

Page 3579 of 4500

LEXUS LS430 2003  Factory Repair Manual 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

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LEXUS LS430 2003  Factory Repair Manual Fig. 296: Installing Water By-Pass Joint FR 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003  Factory Repair Manual Fig. 297: Applying Seal Packing To Sealing Groove  
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003  Factory Repair Manual Fig. 298: Installing Water By-Pass Joint RR 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
21.INSTALL WATER INLET HOUSING 
a. Install a new O-ring to the inlet housing.  
b. Apply soapy water to the O

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LEXUS LS430 2003  Factory Repair Manual Fig. 299: Placing Gaskets On Cylinder Heads 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
b. Install the upper and lower intake manifold assembly with the 6 bolts and 4 nuts.  
Torque: 18 N.m (184 kg

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LEXUS LS430 2003  Factory Repair Manual Fig. 300: Installing Upper And Lower Intake Manifold Assembly 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
24.INSTALL FUEL PIPE SUB-ASSY NO.2 (See REPLACEMENT
 )  
25.INSTALL VACUUM SWITCHING VALVE