Lexus ES: 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 exhaust manifold (TWC: Front Catalyst) removal/installation are shown below.
Necessary Procedures After Parts Removed/Installed/Replaced| Replaced Part or Performed Procedure | Necessary Procedure | Effect/Inoperative Function when Necessary Procedure not Performed | Link |
|---|---|---|---|
| Inspection After Repair |
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CAUTION:
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To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
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To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.
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PROCEDURE
1. REMOVE FRONT FLOOR COVER LH
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2. REMOVE FRONT FLOOR COVER RH
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3. REMOVE FRONT CENTER FLOOR BRACE
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4. REMOVE CENTER FLOOR CROSSMEMBER BRACE
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5. REMOVE FRONT EXHAUST PIPE ASSEMBLY (TWC: Rear Catalyst)
CAUTION:
To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.
| (a) Disengage the wire harness clamp. |
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(b) Disconnect the air fuel ratio sensor (for sensor 2) connector.
| (c) Remove the 2 bolts, 2 nuts and disconnect the front exhaust pipe assembly (TWC: Rear Catalyst) from the exhaust manifold (TWC: Front Catalyst) and center exhaust pipe assembly. |
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(d) Remove the front exhaust pipe assembly (TWC: Rear Catalyst) from the 2 exhaust pipe supports.
(e) Remove the 2 gaskets from the front exhaust pipe assembly (TWC: Rear Catalyst).
6. REMOVE FRONT LOWER NO. 1 FLOOR HEAT INSULATOR
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7. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH
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8. REMOVE FRONT WHEEL OPENING EXTENSION PAD RH
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9. REMOVE NO. 1 ENGINE UNDER COVER
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10. REMOVE NO. 2 ENGINE UNDER COVER ASSEMBLY
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11. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY
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12. REMOVE FRONT CENTER UPPER SUSPENSION BRACE SUB-ASSEMBLY
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13. REMOVE AIR FUEL RATIO SENSOR (for Sensor 1)
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14. REMOVE WIRE HARNESS CLAMP BRACKET
CAUTION:
To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
| (a) Remove the bolt and wire harness clamp bracket. |
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15. SEPARATE NO. 1 EXHAUST MANIFOLD HEAT INSULATOR
CAUTION:
To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
(a) Type A:
| (1) Remove the 5 bolts and separate the No. 1 exhaust manifold heat insulator from the exhaust manifold (TWC: Front Catalyst). |
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(b) Type B:
| (1) Remove the 3 bolts and separate the No. 1 exhaust manifold heat insulator from the exhaust manifold. |
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16. SEPARATE NO. 1 UPPER FRONT FLOOR HEAT INSULATOR
CAUTION:
To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
| (a) Remove the 2 nuts and separate the No. 1 upper front floor heat insulator from the vehicle body. |
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17. REMOVE MANIFOLD STAY
CAUTION:
To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
| (a) Remove the bolt, nut and manifold stay from the exhaust manifold (TWC: Front Catalyst) and cylinder block sub-assembly. |
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18. REMOVE EXHAUST MANIFOLD (TWC: Front Catalyst)
CAUTION:
To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
| (a) Using a 12 mm deep socket wrench, remove the 7 nuts and separate the exhaust manifold (TWC: Front Catalyst) from the cylinder head sub-assembly. |
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(b) Remove the No. 1 upper front floor heat insulator, No. 1 exhaust manifold heat insulator and exhaust manifold (TWC: Front Catalyst).
| (c) Remove the exhaust manifold to head gasket from the cylinder head sub-assembly. |
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19. REMOVE NO. 2 EXHAUST MANIFOLD HEAT INSULATOR
| (a) Type A: (1) Remove the 6 bolts and No. 2 exhaust manifold heat insulator from the exhaust manifold (TWC: Front Catalyst). |
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| (b) Type B: (1) Remove the 3 bolts and No. 2 exhaust manifold heat insulator from the exhaust manifold. |
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READ NEXT:
Installation
INSTALLATION PROCEDURE 1. INSTALL NO. 2 EXHAUST MANIFOLD HEAT INSULATOR (a) Type A: (1) Install the No. 2 exhaust manifold heat insulator to the exhaust manifold (TWC: Front Catalyst) with the 6 bolts
Components
COMPONENTS ILLUSTRATION *A Type A *B Type B *1 FRONT FLOOR COVER RH - - N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *A Type A *B Type B *1
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Removal
REMOVAL PROCEDURE 1. PRECAUTION (for HV Model) (a) w/o Navigation System: NOTICE:
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A communication malfunction DTC
