CYLINDER HEAD GASKET 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 Link
Battery terminal is disconnected/reconnected Memorize steering angle neutral point LKA/LDA System

Click here

Intelligent clearance sonar system*4
Pre-crash safety system

Lighting system (EXT)


  • Cornering lights
Adaptive high beam system
Drive the vehicle until stop and start control is permitted (approximately 15 to 60 minutes) Stop and start system

Click here

Memorize steering angle neutral point Parking Assist Monitor System (w/ Parallel Parking Assist Function)

Click here

Parking Assist Monitor System (w/o Parallel Parking Assist Function)

Click here

Panoramic view monitor system

Click here

Initialize back door lock Power door lock control system

Click here

Reset back door close position Power back door system

Click here

Replacement of ECM Perform Vehicle Identification Number (VIN) or frame number registration

  • MIL illuminates / -

  • DTC P063051 is stored

Click here

ECU Communication ID Registration (Immobiliser system) Engine start function See Service Bulletin for the registration method.

Replacement of ECM

(If possible, read the transaxle compensation code from the previous ECM)

 Possible to read transaxle compensation code

Perform the following procedures in the order shown:


  1. Reset Memory

  2. Transfer Transaxle Compensation Code

  3. Perform Road Test to Allow ECM to Learn

  • Large shift shock

  • Deterioration of fuel efficiency

Click here for Initialization (U661E)

Click here for Registration (U661E)

Click here for Initialization (U661F)

Click here for Registration (U661F)
Impossible to read transaxle compensation code

Perform the following procedures in the order shown:


  1. Reset Memory

  2. Reset Transaxle Compensation Code

  3. Perform Road Test to Allow ECM to Learn

  • Replacement of cylinder head sub-assembly

  • Replacement of camshaft (for intake or exhaust camshaft)

  • Replacement of camshaft timing gear assembly

  • 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 ignition coil assembly

  • Gas leak from exhaust system is repaired

 Inspection After Repair

  • Poor idle, etc.

  • Engine start function, etc.

Click here

Replacement of starter assembly*1

Note

When the starter assembly is replaced, "ST relay" and "ST NO. 2 relay" must be also replaced.

 Clear Number of Starter Operations Stop and start system

Click here

Replacement of battery*1

  • Integrated Current Value Initialization

  • Switch Battery Type

  • Replacement of automatic transaxle assembly*1

  • Replacement of automatic transaxle fluid*1

 Bleed the oil pump assembly with motor (continuously variable transaxle assembly)
Replacement of automatic transaxle assembly

Perform the following procedures in the order shown:


  1. Reset Memory

  2. Input Transaxle Compensation Code into ECM

  3. Perform Road Test to Allow ECM to Learn

  • Large shift shock

  • Deterioration of fuel efficiency

Click here for Initialization (U661E)

Click here for Registration (U661E)

Click here for Initialization (U661F)

Click here for Registration (U661F)
Suspension, tires, etc.*2

  • Ultrasonic sensor detection angle

  • Ultrasonic sensor detection angle registration

  • Intelligent clearance sonar system

  • LEXUS parking assist-sensor system (w/ Intelligent Clearance Sonar System)

Click here

Rear television camera assembly optical axis (Back camera position setting) Parking assist monitor system (w/ Parallel Parking Assist Function)

Click here for Initialization

Click here for Calibration
Parking assist monitor system (w/o parallel parking assist function)

Click here for Initialization

Click here for Calibration

  • Parking assist ECU initialization

  • Adjust steering angle

 Panoramic view monitor system

Click here for Initialization

Click here for Calibration
Initialize headlight ECU sub-assembly LH

  • Adaptive high beam system

  • Automatic headlight beam level control system

Click here

Front wheel alignment adjustment

  1. Clearing zero point calibration data and system information.

  2. Perform yaw rate and acceleration sensor zero point calibration and store system information.

  • VSC disabled or malfunctions

  • DTCs are stored

  • Slip indicator light illuminates

  • ABS warning light illuminates

  • Theft deterrent system (tilt sensor)*3

Click here

*1: w/ Stop and Start System
*2: The vehicle height changes because of suspension or tire replacement
*3: w/ TFT Meter Type
*4: When performing learning using the GTS.
Click here Click here

PROCEDURE


  1. REMOVE TIMING CHAIN COVER ASSEMBLY

    Click here

  2. REMOVE PURGE VALVE (PURGE VSV)

    Click here

  3. DISCONNECT NO. 1 WATER BY-PASS HOSE AND NO. 2 WATER BY-PASS HOSE

    Click here

  4. REMOVE INTAKE MANIFOLD WITH INTERCOOLER ASSEMBLY AND THROTTLE WITH MOTOR BODY ASSEMBLY

    Click here

  5. DISCONNECT NO. 6 ENGINE WIRE (for Port Injection)

    Click here

  6. REMOVE FUEL DELIVERY PIPE (for Port Injection)

    Click here

  7. REMOVE PORT FUEL INJECTOR ASSEMBLY (for Port Injection)

    Click here

  8. DISCONNECT SENSOR WIRE (for Direct Injection)

    Click here

  9. REMOVE FUEL DELIVERY PIPE SUB-ASSEMBLY (for Direct Injection)

    Click here

  10. REMOVE DIRECT FUEL INJECTOR ASSEMBLY (for Direct Injection)

    Click here

  11. REMOVE FUEL INJECTOR SEAL (for Direct Injection)

    Click here

  12. REMOVE NO. 1 EXHAUST MANIFOLD HEAT INSULATOR

    Click here

  13. REMOVE NO. 2 EXHAUST MANIFOLD HEAT INSULATOR

    Click here

  14. REMOVE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (TWC: Front Catalyst)

    Click here

  15. DISCONNECT INLET TURBO OIL PIPE SUB-ASSEMBLY

    Click here

  16. REMOVE TURBOCHARGER SUB-ASSEMBLY

    Click here

  17. REMOVE VACUUM PUMP ASSEMBLY

    Click here

  18. REMOVE ENGINE OIL LEVEL DIPSTICK GUIDE

    Click here

  19. SET NO. 1 CYLINDER TO TDC/COMPRESSION

    Click here

  20. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY

    Click here

  21. REMOVE TIMING CHAIN GUIDE

    Click here

  22. REMOVE CHAIN TENSIONER SLIPPER

    Click here

  23. REMOVE CHAIN SUB-ASSEMBLY

    Click here

  24. REMOVE NO. 1 CHAIN VIBRATION DAMPER

    Click here

  25. REMOVE CAMSHAFT TIMING GEAR ASSEMBLY

    Click here

  26. REMOVE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY

    Click here

  27. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY

    Click here

  28. REMOVE NO. 3 WATER BY-PASS PIPE

    Click here

  29. DISCONNECT NO. 7 WATER BY-PASS HOSE


    1. B005Q1J

      Slide the clip and disconnect the No. 7 water by-pass hose from the cylinder head sub-assembly.

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

    Click here

  31. REMOVE VALVE LASH ADJUSTER ASSEMBLY

    Click here

  32. REMOVE VALVE STEM CAP

    Click here

  33. REMOVE CYLINDER HEAD SUB-ASSEMBLY


    1. B005LH9N03

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

      Note


      • Be careful not to drop cylinder head plate washers into the cylinder head sub-assembly.

      • Warpage or cracking of the cylinder head sub-assembly may result from removing bolts in the incorrect order.

      Tech Tips

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

    2. Remove the cylinder head sub-assembly.

  34. REMOVE CYLINDER HEAD GASKET


    1. Remove the cylinder head gasket from the cylinder block sub-assembly.

  35. INSPECT CYLINDER HEAD SET BOLT

    Click here

  36. INSPECT CYLINDER HEAD SUB-ASSEMBLY

    Click here