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

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during intake manifold removal/installation are shown below.

NOTICE:

After the engine switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, make sure to wait at least 120 seconds before disconnecting the cable from the negative (-) battery terminal.

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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2. DISCHARGE FUEL SYSTEM PRESSURE

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3. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

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

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4. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY

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5. REMOVE V-BANK COVER SUB-ASSEMBLY

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6. DISCONNECT VENTILATION HOSE

(a) Slide the clip and disconnect the ventilation hose from the intake air surge tank assembly.

7. DISCONNECT PURGE VALVE (PURGE VSV) (for TMMC Made)

(a) Disconnect the No. 1 fuel vapor feed hose from the intake air surge tank assembly.

(b) Remove the bolt and disconnect the purge valve (purge VSV) from the intake air surge tank assembly.

8. DISCONNECT PURGE VALVE (PURGE VSV) (except TMMC Made)

(a) Disconnect the No. 1 fuel vapor feed hose from the intake air surge tank assembly.

(b) Remove the bolt and disconnect the purge valve (purge VSV) from the intake air surge tank assembly.

9. REMOVE NO. 2 SURGE TANK STAY

(a) Remove the 2 bolts and No. 2 surge tank stay from the intake manifold and camshaft housing RH.

10. REMOVE INTAKE AIR SURGE TANK ASSEMBLY

(a) Disconnect the vacuum switching valve (for ACIS) connector.

*a Vacuum Switching Valve (for ACIS) Connector *b Wire Harness Clamp *c Vacuum Hose Sub-assembly

(b) Disengage the wire harness clamp from the intake air surge tank assembly.

(c) Disengage the 5 clamps to disconnect the vacuum hose sub-assembly from the intake air surge tank assembly.

(d) Disengage the 2 clamps to disconnect the vacuum hose sub-assembly from the intake air surge tank assembly.

*1 Vacuum Hose Sub-assembly *2 No. 2 Air Tube

(e) Disengage the clamp to disconnect the No. 2 air tube from the intake air surge tank assembly.

(f) Remove the 5 bolts, 2 nuts and intake air surge tank assembly from the intake manifold.

	Bolt
	Nut

(g) Disconnect the vacuum hose sub-assembly from the intake air surge tank assembly.

11. REMOVE AIR SURGE TANK TO INTAKE MANIFOLD GASKET

(a) Remove the air surge tank to intake manifold gasket from the intake air surge tank assembly.

12. REMOVE NO. 1 V-BANK COVER BRACKET

HINT:

Perform this procedure only when replacement of the No. 1 V-bank cover bracket is necessary.

(a) Remove the 2 No. 1 V-bank cover brackets from the intake air surge tank assembly.

13. REMOVE NO. 2 ENGINE MOUNTING STAY RH

	Bolt
	Nut

(a) Remove the bolt, 2 nuts and No. 2 engine mounting stay RH from the engine mounting insulator sub-assembly RH.

(b) Disengage the wire harness clamp from the wire harness clamp bracket.

(c) Remove the bolt and disconnect the wire harness clamp bracket from the No. 2 engine mounting stay RH.

(d) Remove the bolt and No. 2 engine mounting stay RH from the intake manifold and engine mounting insulator sub-assembly RH.

14. DISCONNECT FUEL TUBE SUB-ASSEMBLY

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15. REMOVE FUEL DELIVERY PIPE SUB-ASSEMBLY

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16. REMOVE NO. 1 DELIVERY PIPE SPACER

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17. REMOVE INJECTOR VIBRATION INSULATOR

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18. REMOVE INTAKE MANIFOLD

(a) Remove the 4 bolts, 4 nuts and intake manifold from the cylinder head sub-assembly.

	Bolt
	Nut

19. REMOVE NO. 1 INTAKE MANIFOLD TO HEAD GASKET

(a) Remove the 2 No. 1 intake manifold to head gaskets from each cylinder head sub-assembly.

20. REMOVE STUD BOLT

HINT:

If a stud bolt is deformed or the threads are damaged, replace it.

(a) Using an E8 "TORX" socket wrench, remove the 2 stud bolts from the intake manifold.