M20A-FKS (INTAKE / EXHAUST): EXHAUST MANIFOLD (for Torsion Beam Type Suspension): REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [09/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000025JIE
Model Year Start: 2023	Model: Corolla Hatchback	Prod Date Range: [09/2022 - ]
Title: M20A-FKS (INTAKE / EXHAUST): EXHAUST MANIFOLD (for Torsion Beam Type Suspension): REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [09/2022 - ]

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
Replacement of air fuel ratio sensor (sensor 1) Gas leaks from exhaust system is repaired	Inspection after repair	Poor idle, etc. Engine start function, etc.

CAUTION:

To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.

PROCEDURE

1. REMOVE FRONT FLOOR CENTER BRACE

(a) Remove the 8 bolts and 2 front floor center braces from the vehicle body.

2. REMOVE FRONT EXHAUST PIPE ASSEMBLY (TWC: Rear Catalyst)

CAUTION:

To prevent burns, do not touch the engine, exhaust manifold (TWC: Front Catalyst) or other high temperature components while the engine is hot.
To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.

(a) Disconnect the air fuel ratio sensor connector.

(b) Disengage the wire harness clamp.

(c) Remove the 4 bolts and 4 compression springs and disconnect the front exhaust pipe assembly (TWC: Rear Catalyst) from the exhaust manifold (TWC: Front Catalyst) and tail exhaust pipe assembly.

(d) Remove the front exhaust pipe assembly (TWC: Rear Catalyst) from the 3 exhaust pipe supports.

(e) Remove the 2 gaskets from the exhaust manifold (TWC: Front Catalyst) and front exhaust pipe assembly (TWC: Rear Catalyst).

3. REMOVE FRONT NO. 1 FLOOR HEAT INSULATOR

for TMC Made: Click here

for TMMMS Made: Click here

4. REMOVE NO. 1 ENGINE UNDER COVER ASSEMBLY

Click here

5. REMOVE AIR FUEL RATIO SENSOR

Click here

6. REMOVE NO. 1 EXHAUST MANIFOLD HEAT INSULATOR

CAUTION:

To prevent burns, do not touch the engine, exhaust manifold (TWC: Front Catalyst) or other high temperature components while the engine is hot.

(a) Remove the 3 bolts and No. 1 exhaust manifold heat insulator from the exhaust manifold (TWC: Front Catalyst).

7. REMOVE MANIFOLD STAY

CAUTION:

To prevent burns, do not touch the engine, exhaust manifold (TWC: Front Catalyst) 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.

8. REMOVE EXHAUST MANIFOLD (TWC: Front Catalyst)

CAUTION:

To prevent burns, do not touch the engine, exhaust manifold (TWC: Front Catalyst) or other high temperature components while the engine is hot.

(a) Using a 12 mm deep socket wrench, remove the 7 nuts and exhaust manifold (TWC: Front Catalyst) from the cylinder head sub-assembly.

(b) Remove the exhaust manifold to head gasket from the cylinder head sub-assembly.

9. REMOVE NO. 2 EXHAUST MANIFOLD HEAT INSULATOR

(a) Remove the 3 bolts and No. 2 exhaust manifold heat insulator from the exhaust manifold (TWC: Front Catalyst).