Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Installation

INSTALLATION

PROCEDURE

1. INSTALL FUEL INJECTOR ASSEMBLY

HINT:

Perform "Inspection After Repair" after replacing a fuel injector assembly.

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(a) Apply a light coat of spindle oil or gasoline to 6 new O-rings, and install 1 to each fuel injector assembly.

NOTICE:

Check that there is no damage or foreign matter on the groove of the fuel injector assembly when installing the O-ring to each fuel injector assembly.

(b) for Bank 1:

(1) Connect the 3 fuel injector assembly connectors.

(2) Install the 3 fuel injector assemblies to the fuel delivery pipe sub-assembly. NOTICE: Make sure that the fuel injector assembly is located within the stopper as shown in the illustration. Check that the fuel injector assembly installation holes of the fuel delivery pipe sub-assembly are not damaged and are free of foreign matter. Make sure that the O-ring is not damaged, twisted or moved out of place when installing the fuel injector assembly.

*a Stopper

(3) Engage the clamp to connect the No. 5 engine wire to the fuel delivery pipe sub-assembly.

(c) for Bank 2:

(1) Connect the 3 fuel injector assembly connectors.

(2) Install the 3 fuel injector assemblies to the fuel delivery pipe sub-assembly. NOTICE: Make sure that the fuel injector assembly is located within the stopper as shown in the illustration. Check that the fuel injector assembly installation holes of the fuel delivery pipe sub-assembly are not damaged and are free of foreign matter. Make sure that the O-ring is not damaged, twisted or moved out of place when installing the fuel injector assembly.

*a Stopper

(3) Engage the clamp to connect the No. 5 engine wire to the fuel delivery pipe sub-assembly.

2. INSTALL INJECTOR VIBRATION INSULATOR

(a) Install 6 new injector vibration insulators to the intake manifold.

3. INSTALL NO. 1 DELIVERY PIPE SPACER

(a) Install the 4 No. 1 delivery pipe spacers to the intake manifold.

4. INSTALL FUEL DELIVERY PIPE SUB-ASSEMBLY

(a) Place the fuel delivery pipe sub-assembly with the 6 fuel injector assemblies onto the intake manifold.

NOTICE:

Be careful not to drop the fuel injector assemblies when installing the fuel delivery pipe sub-assembly.

(b) Install the fuel delivery pipe sub-assembly with the fuel injector assemblies with the 4 bolts.

Torque:

17 N·m {173 kgf·cm, 13 ft·lbf}

(c) Connect the 2 No. 5 engine wire connectors.

(d) Connect the fuel pressure sensor connector.

5. CONNECT FUEL TUBE SUB-ASSEMBLY

(a) Connect the fuel tube sub-assembly to the fuel delivery pipe sub-assembly.

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6. INSTALL INTAKE AIR SURGE TANK ASSEMBLY

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7. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

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8. INSPECT FOR FUEL LEAK

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9. PERFORM INITIALIZATION

(a) Perform "Inspection After Repair" after replacing a fuel injector assembly.

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