2003 LEXUS LS430 Identifying ac

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. Remove only enough metal to clean the seats.

Fig. 358: Identifying Cutters Angel Seating Position (To High)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
e. If the seatin
g is too low on the valve face: Use 60° and 45° cutters to correct the seat.

Fig. 359: Identifying Cutters Angel Seating Position (Lo High)
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 and valve seat.

Fig. 369: Identifying Plastigage
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
7. Remove the bearing caps.
8. Measure the Plastigage at its widest point.

Fig. 385: Identifying Plastigage
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
6. Remove the bearing caps.
7. Measure the Plastigage at its widest point.
STANDARD OIL CLEARANCE:
STANDARD OIL CLEARANCE SPECIFICATIONS
MAXIMUM OIL CLEARANCE:
MAXIMUM OIL CLEARANCE SPECIFICATIONS
If the oil clearance is greater than the maximum, replace the No. 3 camshaft and timing tube.
If necessar
y, replace the bearing caps and cylinder head as a set.
Camshaft journal0.030 to 0.067 mm (0.0012 to 0.0026 in.)
Camshaft timing tube journal0.036 to 0.057 mm (0.0014 to 0.0022 in.)
Camshaft journal0.100 mm (0.0039 in.)
Camshaft timing tube journal0.085 mm (0.0033 in.)

Maximum oil clearance: 0.100 mm (0.0039 in.)
If the oil clearance is greater than the maximum, replace the No. 4 camshaft. If necessary,
replace the bearing caps and cylinder head as a set.
8. Completely remove the Plastigage.
9. Remove the No. 4 camshaft.
Fig. 392: Identifying Plastigage

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 398: Identifying Tight Plug
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

23.INSTALL RING W/ HEAD PIN
Fig. 399: Identifying Ring W/ Head Pin Dimension

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
24.INSTALL STUD BOLT
Fig. 400: Identifying Stud Bolt Dimension