2ZR-FAE (ENGINE MECHANICAL): CYLINDER HEAD GASKET: REMOVAL; 2023 MY Corolla [09/2022

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM10000000271KI
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - 11/2022]
Title: 2ZR-FAE (ENGINE MECHANICAL): CYLINDER HEAD GASKET: REMOVAL; 2023 MY Corolla [09/2022 - 11/2022]

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 cylinder head gasket 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
1: w/ Smart Key System 2: w/o Smart Key System *3: w/ Steering Lock Function
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on
	ECU communication ID registration (Immobiliser system)	Engine start function
	Reset memory Deceleration sensor zero point calibration CVT oil pressure calibration	Large shift shock Deterioration of fuel efficiency
Replacement of ECM*1	Code registration (Smart Key System (for Gasoline Model, Start Function))	Wireless Door Lock Control System (for Gasoline Model with Smart Key System) Smart Key System (for Gasoline Model, Entry Function) Smart Key System (for Gasoline Model, Start Function) Steering lock function*3
Replacement of ECM*2	Code registration (Immobiliser system)	Engine start Telematics System
Replacement of throttle body assembly Replacement of engine assembly Replacement of cylinder head sub-assembly Replacement of camshaft timing gear assembly Replacement of camshaft timing exhaust gear assembly Replacement of fuel injector assembly Replacement of ignition coil assembly Gas leak from exhaust system is repaired	Inspection After Repair	Poor idle, etc. Engine start function, etc.
Front wheel alignment adjustment	Perform "Reset Memory". Perform acceleration sensor zero point calibration and store system information memorization.	VSC is disabled or malfunctions DTCs are output Slip indicator light illuminates ABS warning light illuminates	w/ Electric Parking Brake System: w/o Electric Parking Brake System:
CVT fluid	ATF thermal degradation estimate reset	The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly	for K313

HINT:

When the cable is disconnected / reconnected to the battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

Learning completes when vehicle is driven

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Pre-collision System (for TMMMS Made)	Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.
Lane Tracing Assist System (for TMMMS Made)
Lane Departure Alert System (for TMMMS Made)

PROCEDURE

1. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY

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2. REMOVE NO. 1 WATER BY-PASS PIPE

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3. REMOVE CYLINDER HEAD SUB-ASSEMBLY

(a) Using a 10 mm bi-hexagon socket wrench, uniformly loosen and remove the 10 cylinder head set bolts and 10 cylinder head set plate washers in several steps in the order shown in the illustration.

NOTICE:

Do not drop the cylinder head set plate washers into the cylinder head sub-assembly.
Removing the cylinder head set bolts in the incorrect order may cause warpage or cracking of the cylinder head sub-assembly.

HINT:

Arrange the removed parts in such a way that they can be reinstalled to their original locations.

(b) Remove the cylinder head sub-assembly from the cylinder block sub-assembly.

4. REMOVE CYLINDER HEAD GASKET

(a) Remove the cylinder head gasket from the cylinder block sub-assembly.

5. INSPECT CYLINDER HEAD FOR FLATNESS

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6. INSPECT CYLINDER HEAD SET BOLT

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