2003 LEXUS LS430 cylinder head

Fig. 137: Placing Cylinder Head Gasket
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Install the cylinder head bolts.
HINT:
The cylinder head bolts are tightened in 2 progressive steps (steps (3) and (5)).
If any cylinder head bolt is broken or deformed, replace it.
1. Apply a light coat of engine oil on the threads and under the heads of the cylinder head bolts.
2. Install the plate washer to the cylinder head bolt.
3. Install and uniformly tighten the 10 cylinder head bolts on one side of the cylinder head in several
passes in the sequence shown in the illustration.
Torque: 59 N.m (602 kgf.cm, 44 ft.lbf)
If any one of the cylinder head bolts does not meet the torque specification, replace the cylinder
head bolt.

Fig. 138: Identifying Cylinder Head Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 139: Locating Portion A
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4. Mark the front of the cylinder head bolt head with paint.
5. Retighten the cylinder head bolts by 90° in the sequence shown in the illustration.
6. Check that the painted mark is now at a 90° an
gle to front.

Fig. 140: Locating Painted Mark
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
61.INSTALL CYLINDER HEAD LH
a. Place a new cylinder head gasket on the cylinder block.
HINT:
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.
b. Place the cylinder head on the cylinder head gasket.

Fig. 141: Placing Cylinder Head On Cylinder Head Gasket
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Install the cylinder head bolts.
HINT:
The cylinder head bolts are tightened in 2 progressive steps (steps (3) and (5)).
If any cylinder head bolt is broken or deformed, replace it.
1. Apply a light coat of engine oil on the threads and under the heads of the cylinder head bolts.
2. Install the plate washer to the cylinder head bolt.
3. Install and uniformly tighten the 10 cylinder head bolts on one side of the cylinder head in several
passes in the sequence shown in the illustration.
Torque: 59 N.m (602 kgf.cm, 44 ft.lbf)
If any one of the cylinder head bolts does not meet the torque specification, replace the cylinder
head bolt.

Fig. 142: Identifying Cylinder Head Bolt
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 143: Locating Portion A
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4. Mark the front of the cylinder head bolt head with paint.
5. Retighten the cylinder head bolts by 90° in the sequence shown in the illustration.
6. Check that the painted mark is now at a 90° angle to front.
62.INSTALL CAMSHAFT

Fig. 144: Tightening Cylinder Head Bolt
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Set the crankshaft position.
1. Using the crankshaft damper bolt, turn the crankshaft, and set the set key of the crankshaft to
90° counterclockwise from the timing mark (1 dot mark) of the oil pump body.