M20A-FKS (ENGINE MECHANICAL): CYLINDER HEAD GASKET: REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000002BA0B
Model Year Start: 2023	Model: Corolla Hatchback	Prod Date Range: [03/2023 - ]
Title: M20A-FKS (ENGINE MECHANICAL): CYLINDER HEAD GASKET: REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 - ]

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/ Steering Lock Function 2: w/o Smart Key System 3: w/ Smart Key System 4: If matchmarks were not placed when removing parts related to steering operation, perform end position initial setting. 5: If transaxle compensation code read from ECM 6: If transaxle compensation code not read from ECM
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on
	for K121 ECU configuration	-
	Update ECU security key	Vehicle Control History (RoB) are stored
	ECU communication ID registration (Immobiliser system)	Engine start function
Replacement of ECM*3	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*1
Replacement of ECM*2	Code registration (Immobiliser system)	Engine start Telematics System
Gas leak from exhaust system is repaired Replacement of throttle body with motor assembly Replacement of cam timing control motor with EDU assembly Removal and installation of a cam timing control motor with EDU assembly Replacement of camshaft timing gear assembly Removal and installation of a camshaft timing gear assembly Replacement of cylinder head sub-assembly Replacement of camshaft (for intake or exhaust camshaft) Replacement of camshaft timing exhaust gear assembly Replacement of port fuel injector assembly Replacement of direct fuel injector assembly Replacement of fuel pump assembly (for high pressure side) Replacement of spark plug Replacement of ignition coil assembly Replacement of EGR valve assembly Replacement of knock control sensor Replacement of air fuel ratio sensor (sensor 2)	Inspection After Repair	Poor idle, etc. Engine start function, etc.
Replacement of continuously variable transaxle assembly	for K120 Input transaxle compensation code into TCM Perform reset memory CVT oil pressure calibration Perform road test to allow TCM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Registration:
Replacement of continuously variable transaxle assembly	for K121 Input transaxle compensation code into ECM Perform reset memory CVT oil pressure calibration Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Registration:
Replacement of ECM	for K120 Perform reset memory CVT oil pressure calibration Perform road test to allow TCM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Registration:
Replacement of ECM	for K121 Transfer transaxle compensation code5 Reset transaxle compensation code6 CVT oil pressure calibration Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	Initialization: Registration:
Front wheel alignment adjustment	Perform "Reset Memory" Perform "Calibration"	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 K120: for K121:
Steering gear assembly4 No. 2 steering intermediate shaft assembly4	for TMC Made End position initial setting	-

NOTICE:

This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

Click here

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
Front Camera System	Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more.

Learning completes when vehicle is operated normally

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
*1: for Hatchback
Power Door Lock Control System Back door opener*1	Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.

PROCEDURE

1. INSTALL ENGINE ASSEMBLY TO ENGINE STAND

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2. REMOVE ENGINE HANGER

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3. REMOVE V-RIBBED BELT TENSIONER ASSEMBLY

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4. REMOVE NO. 2 WATER BY-PASS PIPE SUB-ASSEMBLY

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5. REMOVE FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY)

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6. REMOVE NO. 1 EXHAUST MANIFOLD HEAT INSULATOR

for Double Wishbone Type Suspension: Click here

for Torsion Beam Type Suspension: Click here

7. REMOVE EXHAUST MANIFOLD (TWC: Front Catalyst)

for Double Wishbone Type Suspension: Click here

for Torsion Beam Type Suspension: Click here

8. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY

Click here

9. REMOVE THROTTLE BODY GASKET

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10. REMOVE EGR COOLER ASSEMBLY

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11. REMOVE NO. 1 EGR PIPE SUB-ASSEMBLY

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12. REMOVE EGR VALVE ASSEMBLY

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13. REMOVE NO. 3 WATER BY-PASS PIPE

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14. REMOVE INTAKE MANIFOLD STAY

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15. DISCONNECT NO. 1 FUEL VAPOR FEED HOSE

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16. REMOVE INTAKE MANIFOLD

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17. REMOVE NO. 1 INTAKE MANIFOLD TO HEAD GASKET

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18. DISCONNECT FUEL TUBE SUB-ASSEMBLY

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19. REMOVE NO. 1 FUEL PIPE SUB-ASSEMBLY

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20. REMOVE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (for High Pressure)

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21. REMOVE NO. 1 WATER BY-PASS HOSE ASSEMBLY

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22. REMOVE FUEL DELIVERY PIPE SUB-ASSEMBLY

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23. REMOVE FUEL DELIVERY SPACER

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24. REMOVE INJECTOR VIBRATION INSULATOR

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25. REMOVE NO. 5 ENGINE WIRE

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26. REMOVE PORT FUEL INJECTOR ASSEMBLY

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27. REMOVE FUEL DELIVERY PIPE

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28. REMOVE DIRECT FUEL INJECTOR ASSEMBLY

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29. REMOVE FUEL INJECTOR SEAL

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30. REMOVE IGNITION COIL ASSEMBLY

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31. REMOVE ENGINE OIL LEVEL DIPSTICK GUIDE

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32. REMOVE VACUUM SURGE TANK

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33. REMOVE OIL PRESSURE CONTROL VALVE ASSEMBLY

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34. REMOVE CAMSHAFT POSITION SENSOR (for Intake Side)

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35. REMOVE CAMSHAFT POSITION SENSOR (for Exhaust Side)

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36. REMOVE CAM TIMING OIL CONTROL SOLENOID ASSEMBLY

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37. REMOVE CAM TIMING CONTROL MOTOR WITH EDU ASSEMBLY

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38. REMOVE CAM TIMING CONTROL MOTOR O-RING

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39. REMOVE VACUUM PUMP ASSEMBLY

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40. REMOVE CRANKSHAFT PULLEY ASSEMBLY

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41. REMOVE WATER OUTLET

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42. REMOVE WATER BY-PASS OUTLET SUB-ASSEMBLY

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43. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY

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44. REMOVE SPARK PLUG TUBE GASKET

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45. REMOVE ENGINE MOUNTING BRACKET RH

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46. REMOVE NO. 2 TIMING CHAIN COVER ASSEMBLY

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47. REMOVE TIMING CHAIN COVER OIL SEAL

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

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49. REMOVE OIL PUMP DRIVE CHAIN SUB-ASSEMBLY

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50. REMOVE CAMSHAFT TIMING GEAR ASSEMBLY

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51. REMOVE CHAIN SUB-ASSEMBLY

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52. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY

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53. REMOVE CHAIN TENSIONER SLIPPER

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54. REMOVE NO. 1 CHAIN VIBRATION DAMPER

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55. REMOVE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY

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56. REMOVE TIMING CHAIN COVER ASSEMBLY

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57. REMOVE FUEL PUMP LIFTER GUIDE

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58. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY

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59. REMOVE CAMSHAFT BEARING CAP

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60. REMOVE INTAKE CAMSHAFT SUB-ASSEMBLY

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61. REMOVE EXHAUST CAMSHAFT SUB-ASSEMBLY

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

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63. REMOVE VALVE LASH ADJUSTER ASSEMBLY

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64. REMOVE CYLINDER HEAD SUB-ASSEMBLY

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65. REMOVE CYLINDER HEAD GASKET

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

66. INSPECT CYLINDER HEAD SET BOLT

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67. INSPECT CYLINDER HEAD SUB-ASSEMBLY

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REMOVAL

CAUTION / NOTICE / HINT

Necessary Procedures After Parts Removed/Installed/Replaced

for K121

for K120

for K121

for K120

for K121

for TMC Made

Learning completes when vehicle is driven

Learning completes when vehicle is operated normally

PROCEDURE