2003 LEXUS LS430 Factory Repair Manual

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Page 3609 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 325: Checking Valve Head Margin Thickness Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. d. Check the valve head margin thickness. Standard margin thickness: 1.0 mm (0.039 in.) Minimum margin

Page 3610 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 326: Checking Valve Overall Length Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. e. Check the valve overall len gth.

Page 3611 of 4500

LEXUS LS430 2003 Factory Repair Manual Standard overall length: 94.80 to 95.30 mm (3.7323 to 3.7520 in.) Minimum overall length: 94.55 mm (3.7224 in.) If the overall length is less than the minimum, replace the valve. Fig. 327: Chec

Page 3612 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 328: Checking Exhaust Valve Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 7.INSPECT EXHAUST VALVE a. Clean the valves. 1. Using a gasket scraper, chip off any carbon from the valve head. 2.

Page 3613 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 329: Measuring Diameter Of Valve Stem Using Micrometer Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. b. Using a micrometer, measure the diameter of the valve stem. Valve stem diameter: 5.465

Page 3614 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 330: Removing Pits And Carbon Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. c. Check the valve face angle. 1. Grind the valve enough to remove pits and carbon. 2. Check that the valve is grou

Page 3615 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 331: Measuring Valve Head Margin Thickness Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. d. Check the valve head margin thickness. Standard margin thickness: 1.0 mm (0.039 in.) Minimum margin

Page 3616 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 332: Checking Valve Overall Length Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. e. Check the valve overall len gth.
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