LEXUS LS430 2003 Factory Repair Manual

REPLACEMENT
1.DRAIN ENGINE COOLANT (See ENGINE COOLANT
)
2.WORK FOR PREVENTING GASOLINE FROM SPILLING OUT (See PRECAUTION
)
3.DISCONNECT BATTERY NEGATIVE TERMINAL
4.REMOVE V-BANK COVER
5.REMOVE INTAKE AIR CONNECTOR PIPE
6.REMOVE THROTTLE BODY ASSY (See REPLACEMENT
)
7.REMOVE INTAKE MANIFOLD ASSY
Fig. 20: Disconnecting VSV Connector For EVAP

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the fuel pipe sub-assy No. 2 from the fuel main tube (see PRECAUTION
).
b. Disconnect the VSV connector for EVAP.
c. Disconnect the EVAP hose from the VSV for EVAP.
d. Remove the bolt, disconnect the VSV for EVAP from the upper intake manifold.
e. Remove the bolt and V-bank cover bracket No. 2.
f. Remove the bolt and V-
bank cover bracket No. 3.

g. Disconnect the VSV connector for IAC Valve.
Fig. 21: Disconnecting VSV Connector For IAC Valve

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
h. Remove the bolt and V-bank cover bracket No. 1.
i. Remove the bolt and V-bank cover bracket No. 4.
j. Remove the 4 bolts, and disconnect the engine wire protector (LH side) from upper intake manifold
and camshaft bearing cap.

Fig. 22: Removing Bolts And Disconnecting Engine Wire Protector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
k. Disconnect the 2 wire clamps on the engine wire (RH side) from the brackets on the RH delivery
pipe.
l. Remove the 2 bolts, and disconnect the engine wire protector (rear side) from the rear water bypass
joint and RH cylinder head.
m. Disconnect the 8 injector connectors.
Fig. 23: Identifying Bolts

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n. Remove the 6 bolts, 4 nuts, the upper and lower intake manifolds assembly and 2 gaskets.
8.REMOVE KNOCK SENSOR

Fig. 24: Removing Knock Sensor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the 2 knock sensor connectors.
b. Remove the 2 nuts and 2 knock sensors.
9.INSTALL KNOCK SENSOR

Fig. 25: Installing Knock Sensor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Install the 2 knock sensors with the 2 nuts, as shown in the illustration.
Torque: 20 N.m (204 kgf.cm, 15 ft,lbf)
b. Connect the 2 knock sensor connectors.
10.INSTALL INTAKE MANIFOLD ASSY

Fig. 26: Installing Intake Manifold Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Place 2 new gaskets on the cylinder heads with the white mark facing outward.
b. Install the upper and lower intake manifolds assembly with the 6 bolts and 4 nuts.

Fig. 27: Installing Upper And Lower Intake Manifolds Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Torque: 18 N.m (185 kgf.cm, 13 ft.lbf)
c. Connect the 8 injector connectors.
d. Install the engine wire protector (rear side) with the 2 bolts.

Fig. 28: Identifying Wire Clamps
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
e. Install the engine wire protector (LH side) with the 4 bolts.
f. Install the 2 wire clamps on the engine wire (RH side) to the brackets on the RH delivery pipe.
g. Install the V-bank cover bracket No. 4 with bolt.
Fig. 29: Connecting VSV Connector For IAC Valve

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Torque: 7.5 N.m (76.5 kgf.cm, 66 in..lbf)
h. Install the V-bank cover bracket No. 1 with bolt.
Torque: 7.5 N.m (76.5 kgf.cm, 66 in..lbf)
i. Connect the VSV connector for IAC Valve.
j. Install the V-
bank cover bracket No. 3 with bolt.