2003 LEXUS LS430 Factory Repair Manual

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Page 3633 of 4500

LEXUS LS430 2003 Factory Repair Manual Different the bushes are used for the intake and exhaust. Bush length: 40.5 mm (1.594 in.) Fig. 348: Identifying Intake And Exhaust Bush Dimension Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. c.

Page 3634 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 349: Taping Guide Bush Using SST And Hammer Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. e. Using a sharp 5.5 mm reamer, ream the guide bush to obtain the standard specified clearance (see ste

Page 3635 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 350: Identifying Specification Clearance Using Reamer Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 15.INSPECT INTAKE VALVE SEAT a. Usin g a 45° carbide cutter, resurface the valve seats. Remo

Page 3636 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 351: Checking Intake Valve Seat Identify Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. b. Check the valve seating position. 1. Apply a light coat of Prussian blue (or white lead) to the valve f

Page 3637 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 352: Checking Valve Seating Position Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 2. If blue appears 360° around the valve seat, the guide and face are concentric. If not, resurface the seat.

Page 3638 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 353: Checking Seat Contact Surface (1 Of 2) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. If not, correct the intake valve seats as follows: d. If the seating is too high on the valve face: Use

Page 3639 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 354: Checking Seat Contact Surface (2 Of 2) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. f. Handrub the valve and valve seat with an abrasive compound. g. After handrubbing, clean the valve a

Page 3640 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 355: Cleaning Valve And Valve Seat Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 16.INSPECT EXHAUST VALVE SEAT a. Using a 45° carbide cutter, resurface the valve seats. Remove only enough meta
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