2003 LEXUS LS430 Identifying ac

Fig. 1: Identifying Indicator Mark
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HINT:
After installing the V belt, check that it fits properly in the ribbed grooves. Check with your hand to
confirm that the belt has not slipped out of the groove on the bottom of the crank pulley.
A "new belt" is a belt which has been used for less than 5 minutes on a running engine.
A "used belt" is a belt which has been used on a running engine for 5 minutes or more.
After installing a new belt, run the engine for approximately 5 minutes and then recheck the
tension.

Fig. 2: Identifying Proper Ribbed Grooves
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7.INSPECT IGNITION TIMING
a. Warm up the engine.
b. Check the ignition timing.
1. Connect the hand-held tester (with CAN VIM) to the DLC3.
2. Enter DATA LIST MODE on the hand-held tester.
Ignition timing 8 to 12° BTDC @ idle
HINT:
Please refer to the han
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51[g the DATA LIST.

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6.REMOVE CAMSHAFT (See REPLACEMENT
)
7.REMOVE NO.3 CAMSHAFT SUB-ASSY (See REPLACEMENT
)
8.ADJUST VALVE CLEARANCE
a. Using a powerful magnet, remove the valve lifter and adjusting shim.
Fig. 15: Identifying Powerful Magnet

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b. Determine the replacement adjusting shim size according to these formulas and charts:
1. Using a micrometer, measure the thickness of the removed shim.
2. Calculate the thickness of a new shim so that the valve clearance comes within the specified
value.

Fig. 37: Identifying Bolts
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f. Lift the engine out of the vehicle slowly and carefully.
HINT:
Make sure the engine is clear of all wiring, hose and cable.
g. Place the engine and transmission assy onto the stand.

Fig. 41: Identifying VSV Connector For ACIS
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i. Remove the 4 bolts, and disconnect the engine wire protector (LH side) from the upper intake
manifold and camshaft bearing cap.
j. Disconnect the 2 wire clamps on the engine wire (RH side) from the brackets on the RH delivery
pipe.
k. Remove the 2 bolts, and disconnect the engine wire protector (rear side) from the rear water bypass
joint and RH cylinder head.

Fig. 42: Disconnecting Engine Wire Protector (LH Side) From Upper Intake Manifold
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l. Disconnect the 8 injector connectors.
m. Remove the 6 bolts, 4 nuts, intake manifold assy and 2 gaskets.
Fig. 43: Identifying Bolts

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52.INSPECT INTAKE MANIFOLD ASSY
a. Upper intake manifold:
Using a precision straight edge and feeler gauge, measure the surface contacting the cylinder head
for warpage.
Maximum warpage: 0.15 mm (0.0059 in.)

Fig. 45: Identifying Lower Intake Manifold
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53.REMOVE STARTER ASSY (See REPLACEMENT
)

54.REMOVE GENERATOR ASSY (See REPLACEMENT )
55.REMOVE WATER INLET HOUSING
a. Remove the 2 bolts and inlet housing.
56.REMOVE WATER BYPASS JOINT FR
a. Disconnect the ECT sensor connector.
b. Remove the 4 nuts, water bypass joint and 2 gaskets.
Fig. 46: Identifying Water By
-Pass Joint FR
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57.REMOVE WATER BYPASS JOINT RR
a. Disconnect the heater inlet hose from the water bypass joint.
b. Remove the 4 nuts, water bypass joint and 2 gaskets.