2003 LEXUS LS430 light

Fig. 194: Turning Crank-Shaft
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
d. Using SST, loosen the tension between the camshaft timing pulley (RH bank) and crankshaft
timing pulley by slightly turning the camshaft timing pulley (RH bank) counterclockwise.
SST 09960-10010 (09962-01000, 09963-00350)

Fig. 197: Aligning Timing Marks Of Camshaft Timing Pulleys And Timing Belt Plates
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
Turn the camshaft timing pulleys slightly clockwise to make installation of the timing belt easier.
Camshaft timing pulley of LH bank: 1/2 of a tooth
Camshaft timin
g pulley of RH bank: 1 tooth

Fig. 239: Identifying Bearing Cap Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
11. Install 4 new seal washers to the bearing cap bolts (1 to 4).
12. Apply a light coat of engine oil on the threads and under the heads of the bearing cap bolts (5 to
22).
13. Install the oil feed pipe with the 22 bearing cap bolts.
14. Uniformly tighten the 22 bearing cap bolts in several passes in the sequence shown in the
illustration.
Torque:
<001a0011001800030031001100500003000b001a001a0003004e004a0049001100460050000f0003001900190003004c005100110011004f00450049000c0003004900520055000300450052004f0057005600030015001400030044005100470003001500
15[
16 N.m (163 kgf.cm, 12 ft.lbf) for others

Fig. 269: Removing Service Bolt
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
k. Install 4 new seal washers to the bearing cap bolts (1 to 4).
l. Apply a light coat of engine oil on the threads and under the heads of the bearing cap bolts (5 to
22).
m. Install the oil feed pipe and the 22 bearing cap bolts.
n. Uniformly tighten the 22 bearing cap bolts in several passes in the sequence shown in the
illustration.
Torque:
<001a0011001800030031001100500003000b001a001a0003004e004a0049001100460050000f0003001900190003004c005100110011004f00450049000c0003004900520055000300450052004f00570003000b0015001400030044005100470003001500
15000c[
16 N.m (163 kgf.cm, 12 ft.lbf) for others

Fig. 278: Tightening Cylinder Head Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
18.INSTALL CYLINDER HEAD SUB-ASSY
a. Check that the cut part of the crankshaft timing pulley is in the position shown in the illustration,
and that the piston is below the TDC of compression.
b. Install the cylinder head together with the manifold RH to the cylinder block.
c. Apply a light coat of engine oil on the threads and under the head of the cylinder head bolts.
d. Put the washer on the bolt, and insert the bolt with washer into the cylinder head.

Fig. 291: Removing Cylinder Head Gasket No.2
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
17.INSTALL CYLINDER HEAD GASKET NO.2
a. Place a new cylinder head gasket in position on the cylinder block.
b. The rear side of the cylinder head gasket has marks so that the RH and LH banks can be
distinguished. A "3L" mark is on the LH bank's gasket.
18.INSTALL CYLINDER HEAD LH
a. Check that the cut part of the crankshaft timing pulley is in the position shown in the illustration,
and that the piston is below the TDC of compression.
b. Install the cylinder head together with the manifold RH to the cylinder block.
c. Apply a light coat of engine oil on the threads and under the head of the cylinder head bolts.
d. Put the washer on the bolt, and insert the bolt with washer into the c
ylinder head.

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 face.
2. Lightly press the valve against the seat. Do not rotate the valve.
c. Check the valve face and seat for the following:
1. If blue appears 360° around the face, the valve is concentric. If not, replace the valve.

Fig. 356: Inspecting Exhaust Valve Seat
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 face.
2. Lightly press the valve against the seat. Do not rotate valve.
c. Check the valve face and seat for the following:
1. If blue appears 360° around the valve face, the valve seat is concentric. If not, replace the
valve.
2. If blue appears 360° around the valve seat, the guide and face are concentric. If not, resurface
the seat.
3. Check that the seat contact is in the middle of the valve face and has the width below.
Width: 1.0 to 1.4 mm (0.039 to 0.055 in.)