CYLINDER HEAD DISASSEMBLY

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during engine unit 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
Disconnect cable from negative battery terminal		Memorize steering angle neutral point	LKA/LDA System	Click here
			Intelligent clearance sonar system*2
			Pre-crash safety system
			Lighting system (EXT) Cornering lights
			Adaptive high beam system
			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	for 2GR-FKS (w/ Canister Pump Module): Click here for 2GR-FKS (w/o Canister Pump Module) Click here
		ECU Communication ID Registration (Immobiliser system)	Engine start function	See Service Bulletin for the registration method.
		Perform code registration (Immobiliser system)	Wireless door lock control system Entry and start system Engine start function Steering lock system Telematics system	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: Transfer Transaxle Compensation Code Perform Road Test to Allow ECM to Learn	Large shift shock Deterioration of fuel efficiency	Click here for Initialization (U881E) Click here for Registration (U881E) Click here for Initialization (U881F) Click here for Registration (U881F)
	Impossible to read transaxle compensation code	Perform the following procedures in the order shown: Reset Transaxle Compensation Code Perform Road Test to Allow ECM to Learn	Large shift shock Deterioration of fuel efficiency
w/ Canister Pump Module 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 fuel injector assembly (for port injection) Replacement of fuel injector assembly (for direct injection) Replacement of fuel pump assembly (for high pressure side) Replacement of engine coolant temperature sensor Replacement of spark plug Replacement of ignition coil assembly Air leaks from intake system Gas leak from exhaust system is repaired Replacement of knock control sensor Replacement of Heated oxygen sensor		Inspection After Repair	Poor idle, etc. Engine start function, etc.	Click here
w/o Canister Pump Module 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 fuel injector assembly (for port injection) Replacement of fuel injector assembly (for direct injection) Replacement of fuel pump assembly (for high pressure side) Replacement of engine coolant temperature sensor Replacement of spark plug Replacement of ignition coil assembly Air leaks from intake system Gas leak from exhaust system is repaired Replacement of knock control sensor		Inspection After Repair	Poor idle, etc. Engine start function, etc.	Click here
Replacement of automatic transaxle assembly		Perform the following procedures in the order shown: Reset Memory Input Transaxle Compensation Code into ECM Perform Road Test to Allow ECM to Learn	Large shift shock Deterioration of fuel efficiency	for U881E Initialization: Click here for U881E Registration: Click here for U881F Initialization: Click here for U881F Registration: Click here
Front wheel alignment adjustment		Clear zero point calibration data and store system information. 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)*1	Click here
Suspension, tires, etc. (The vehicle height changes because of suspension or tire replacement)		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)	for Initialization: Click here for Calibration: Click here
			Parking assist monitor system (w/o Parallel Parking Assist Function)	for Initialization: Click here for Calibration: Click here
		Parking assist ECU initialization Adjust steering angle	Panoramic view monitor system	for Initialization: Click here for Calibration: Click here
		Initialize headlight ECU sub-assembly LH	Adaptive high beam system Automatic headlight beam level control system	Click here

*1: w/ TFT Meter Type
*2: When performing learning using the GTS.
Click here Click here

PROCEDURE

REMOVE INTAKE VALVE
1. *a Wooden Block
  
  Using SST and wooden blocks, compress the inner compression spring and remove the 6 valve spring retainer locks from the valve spring retainer.
  
  SST
  
  09202-70020 ( 09202-01010, 09202-01020 )
  
  09202-00021
  
  Tech Tips
  
  Arrange the removed parts in such a way that they can be reinstalled to their original locations.
2. Remove the 6 valve spring retainers, 6 inner compression springs and 6 intake valves from the cylinder head LH.
  
  Tech Tips
  
  Arrange the removed parts in such a way that they can be reinstalled to their original locations.
REMOVE EXHAUST VALVE
1. *a Wooden Block
  
  Using SST and wooden blocks, compress the inner compression spring and remove the 6 valve spring retainer locks from the valve spring retainer.
  
  SST
  
  09202-70020 ( 09202-01010, 09202-01020 )
  
  09202-00021
  
  Tech Tips
  
  Arrange the removed parts in such a way that they can be reinstalled to their original locations.
2. Remove the 6 valve spring retainers, 6 inner compression springs and 6 exhaust valves from the cylinder head LH.
  
  Tech Tips
  
  Arrange the removed parts in such a way that they can be reinstalled to their original locations.
REMOVE INTAKE VALVE STEM OIL SEAL
1. Using needle-nose pliers, remove the 6 intake valve stem oil seals from the intake valve guide bush.
REMOVE EXHAUST VALVE STEM OIL SEAL

Tech Tips

Use the same procedure as for the intake side.
REMOVE VALVE SPRING SEAT
1. Using compressed air and a Magnet Hand, remove the 12 valve spring seats by blowing air onto them from the cylinder head LH.
  
  Tech Tips
  
  Arrange the removed parts in such a way that they can be reinstalled to their original locations.
REMOVE NO. 1 STRAIGHT SCREW PLUG
Note

If coolant leaks from a No. 1 straight screw plug or a plug is corroded, replace it.
1. Using a 10 mm hexagon socket wrench, remove the 2 No. 1 straight screw plugs and 2 water hole gaskets from the cylinder head LH.
REMOVE NO. 2 STRAIGHT SCREW PLUG
Note

If coolant leaks from a No. 2 straight screw plug or a plug is corroded, replace it.
1. Using a 14 mm hexagon socket wrench, remove the No. 2 straight screw plug and cylinder head screw plug gasket from the cylinder head LH.
REMOVE NO. 3 STRAIGHT SCREW PLUG
Note

If coolant leaks from a No. 3 straight screw plug or a plug is corroded, replace it.
1. Using a 10 mm hexagon socket wrench, remove the 4 No. 3 straight screw plugs and 4 cylinder head screw plug gaskets from the cylinder head LH.