2003 LEXUS LS430 lock

Fig. 7: CO/HC Symptom Reference Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.REMOVE AIR CLEANER INLET NO.1
2.REMOVE FAN AND GENERATOR V BELT
a. Loosen the belt tension by turning the belt tensioner counterclockwise, and remove the V belt.
HINT:
The tension pulle
y has a left-hand thread.

Fig. 8: Removing Fan And Generator V Belt
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.INSTALL FAN AND GENERATOR V BELT
a. Set the V belt to everything except the idler pulley No. 2, as shown in the illustration.
b. Loosen the V belt by turning the belt tensioner counterclockwise.
c. Then set the V belt to the idler pulle
y.

Fig. 88: Checking Timing Marks
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3. Using the crankshaft damper bolt, turn the crankshaft counterclockwise by approximately
50°.
c. Alternatel
y loosen the 2 bolts, and remove them, the belt tensioner and dust boot.

Fig. 89: Turning Crankshaft Counterclockwise
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 counterclockwise.
SST 09960-10010 (09962-01000, 09963-00350)
e. Disconnect the belt from the timing belt idler No. 1, and remove the belt.

Fig. 90: Turning Camshaft Timing Pulley Counterclockwise Using SST
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
16.INSPECT TIMING BELT
If there are any defects, as shown in the illustrations, check these points:
a. Premature parting
1. Check for proper installation.
2. Check the timing cover gasket for damage and proper installation.
b. If the belt teeth are cracked or damaged, check to see if either camshaft is locked.

Fig. 91: Checking Timing Belt
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. If there is noticeable wear or cracks on the belt face, check to see if there are nicks on the side of
the idler pulley lock and water pump.
d. If there is wear or damage on only one side of the belt, check the belt guide and the alignment of
each pulley.
e. If there is noticeable wear on the belt teeth, check the timing cover for damage, check that the
gasket has been installed correctly, and check for foreign material on the pulley teeth.
If necessary, replace the timing belt.
17.INSPECT TIMING BELT TENSIONER
a. Visually check the seal portion of the tensioner for oil leakage.
HINT:
If there is only the faint trace of oil on the push rod, the tensioner does not need to be replaced.
If leaka
ge is found, replace the tensioner.

Fig. 106: Identifying Cylinder Head Bolt Into Portion A
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Lift the cylinder head from the dowels on the cylinder block, and place the cylinder head on
wooden blocks on a bench.
HINT:
If the cylinder head cannot be removed, pry between the cylinder head and cylinder block with a
screwdriver.

Fig. 109: Identifying Cylinder Head Bolt Into Portion A
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Lift the cylinder head from the dowels on the cylinder block, and place the cylinder head on
wooden blocks on a bench.
HINT:
If the cylinder head cannot be removed, pry between the cylinder head and cylinder block with a
screwdriver.