2ZR-FXE (ENGINE MECHANICAL): CYLINDER HEAD GASKET: REMOVAL; 2023 - 2025 MY Corolla Corolla HV [11/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000028RAD
Model Year Start: 2023	Model: Corolla	Prod Date Range: [11/2022 - ]
Title: 2ZR-FXE (ENGINE MECHANICAL): CYLINDER HEAD GASKET: REMOVAL; 2023 - 2025 MY Corolla Corolla HV [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 Procedure After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed
Replacement of inverter with converter assembly	ECU configuration	-
Replacement of inverter with converter assembly	Resolver learning	DTCs are stored Slight vibration at a vehicle speed of 5 km/h (3 mph) or less Shock or vibration during acceleration
Replacement of hybrid vehicle transaxle assembly	Resolver learning Initialize resolver
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on
	ECU configuration	-
	Update ECU security key	Vehicle Control History (RoB) are stored
Replacement of throttle body assembly Replacement of cylinder head sub-assembly Replacement of camshaft (for intake or exhaust camshaft) Replacement of camshaft timing gear assembly Replacement of fuel injector assembly Replacement of ignition coil assembly Replacement of EGR valve 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 "Calibration"	DTCs are stored ABS warning light illuminates Brake system warning light (yellow indicator) illuminates Slip indicator light illuminates Electronically controlled brake system disabled or malfunctions

HINT:

When the cable is disconnected / reconnected to the auxiliary 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
Front Camera System	Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more.

PROCEDURE

1. INSTALL ENGINE TO ENGINE STAND

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2. REMOVE ENGINE HANGERS

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3. REMOVE WATER OUTLET

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4. REMOVE EGR PIPE ASSEMBLY

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5. REMOVE EGR VALVE ASSEMBLY WITH EGR COOLER

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6. REMOVE NO. 1 EXHAUST MANIFOLD HEAT INSULATOR

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7. REMOVE MANIFOLD STAY

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8. REMOVE EXHAUST MANIFOLD (TWC: Front Catalyst)

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9. REMOVE INTAKE MANIFOLD

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10. REMOVE ENGINE OIL LEVEL DIPSTICK

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11. REMOVE ENGINE OIL LEVEL DIPSTICK GUIDE

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12. REMOVE WATER BY-PASS PIPE

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13. REMOVE PURGE VALVE (PURGE VSV)

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14. REMOVE FUEL VAPOR FEED PIPE

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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 FUEL INJECTOR ASSEMBLY

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18. REMOVE IGNITION COIL ASSEMBLY

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19. REMOVE CAMSHAFT POSITION SENSOR

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20. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY

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21. REMOVE CYLINDER HEAD COVER GASKET

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22. REMOVE SPARK PLUG TUBE GASKET

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23. SET NO. 1 CYLINDER TO TDC (COMPRESSION)

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24. REMOVE CRANKSHAFT PULLEY

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25. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY

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26. REMOVE TIMING CHAIN COVER OIL SEAL

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27. REMOVE TIMING CHAIN COVER SUB-ASSEMBLY

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28. REMOVE CHAIN TENSIONER SLIPPER

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29. REMOVE NO. 1 CHAIN VIBRATION DAMPER

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30. REMOVE NO. 2 CHAIN VIBRATION DAMPER

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31. REMOVE CHAIN SUB-ASSEMBLY

(a) Using a wrench to hold the hexagonal portion of the camshaft, turn the camshaft timing gear assembly counterclockwise to loosen the chain sub-assembly between the camshaft timing sprocket and camshaft timing gear assembly.

*a	Loosen the Chain Sub-assembly
*b	Place the chain sub-assembly on the non-toothed portion of camshaft timing gear assembly

(b) With the chain sub-assembly loosened, separate the chain sub-assembly from the teeth of the camshaft timing gear assembly and place it on the non-toothed portion of camshaft timing gear assembly.

32. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY

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33. REMOVE CAMSHAFT TIMING GEAR ASSEMBLY

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34. REMOVE CAMSHAFT TIMING SPROCKET

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35. REMOVE CAMSHAFT BEARING CAP

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36. REMOVE NO. 2 CAMSHAFT

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37. REMOVE CAMSHAFT

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38. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY

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39. REMOVE NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY

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40. REMOVE VALVE LASH ADJUSTER ASSEMBLY

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41. REMOVE VALVE STEM CAP

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42. REMOVE CYLINDER HEAD SUB-ASSEMBLY

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43. REMOVE CYLINDER HEAD GASKET

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

44. INSPECT CYLINDER HEAD SET BOLT

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