Lexus RX300, 330 3 2000-06

Cylinder Head

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Removal & Installation



  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Wiper and blade assembly
     
    Top cowl seal and panel
     
    Window washer hoses from the ventilator louvers
     
    Left and right ventilator louvers
     
    Heater air duct
     

  4.  
  5. Relieve the fuel pressure.
  6.  
  7. Remove or disconnect the following:
    NOTE
    Wait at least 90 seconds from the time the negative battery was disconnected to start work.



    Turn the ignition key to the OFF position
     
    Negative battery cable
     

  8.  
  9. Drain the cooling system.
  10.  
  11. Remove or disconnect the following:

    Accelerator and throttle cables, if equipped with an automatic transaxle
     
    Air cleaner cover, air flow meter and the air duct
     
    Front upper suspension brace
     
    Cruise control actuator and bracket, if equipped
     
    2 engine ground straps
     
    Right engine mounting support
     
    Radiator hoses
     
    2 heater hoses
     
    Fuel feed and return lines from the fuel rail assembly
     
    Pressure hose from the hydraulic motor
     
    V-bank cover
     

  12.  
  13. Disconnect the following vacuum hoses:

    Fuel pressure control Vacuum Switching Valve (VSV)
     
    Fuel pressure regulator
     
    Cylinder head rear plate
     
    Intake air control valve VSV
     
    Exhaust Gas Recirculation (EGR) vacuum modulator
     
    EGR valve
     

  14.  
  15. Disconnect the following wiring and hoses:

    Intake air control valve
     
    Fuel pressure regulator
     
    EGR VSV
     

  16.  
  17. Remove the 2 nuts and the emission control valve set.
  18.  
  19. Disconnect the following hoses;

    Brake booster vacuum hose
     
    PCV hose
     
    Intake air control valve vacuum hose
     

  20.  
  21. Remove or disconnect the following:

    Data Link Connector (DLC) from the mounting bracket
     
    2 ground straps from the intake chamber
     
    Hydraulic motor pressure hose from the intake chamber
     
    Right Oxygen (O 2 ) sensor connector from the power steering pressure tube
     
    2 nuts and the power steering pressure tube from the intake chamber
     
    Both power steering air hoses
     
    Engine hanger and the intake chamber support
     
    EGR pipe and gaskets
     

  22.  
  23. Disconnect the following wiring:

    Throttle Position (TP) sensor connector
     
    Idle Air Control (IAC) valve connector
     
    EGR gas temperature connector
     
    Air conditioning idle up connector
     

  24.  
  25. Disconnect the following vacuum hoses:

    2 vacuum hoses from the Thermal Vacuum Valve (TVV)
     
    Vacuum hose from the cylinder head rear plate
     
    Vacuum hose from the charcoal canister
     

  26.  
  27. Remove or disconnect the following:

    Air assist hose and the 2 water bypass hoses
     
    Air intake chamber
     
    Left engine wiring harness and move it aside
     
    Wiring harness from the rear of the engine
     
    Right engine wiring harness and move it aside
     
    Ignition coils and move them aside
     
    Timing belt
     
    Camshaft pulleys and the timing belt rear cover
     
    Cylinder head rear plate
     
    Water inlet pipe
     
    Air assist hose and vacuum hose
     
    Intake manifold and fuel rail assembly
     
    Water outlet
     
    EGR pipe from the right exhaust manifold
     
    Front exhaust pipe and exhaust manifolds
     
    Dipstick assembly and the power steering pump bracket
     
    Valve covers and the Camshaft Position (CMP) sensor
     
    Camshafts
     

  28.  
  29. Be sure the engine is at/or near ambient temperature and remove the 2 (1 on each head) 8mm recessed hex bolts. Loosen and remove the 8 head bolts evenly, in 3 passes, in the reverse order of the installation sequence. Carefully lift the head from the engine; if necessary to pry the head loose, take great care not to damage the mating surfaces. Place the head on wood blocks in a clean work area.
    NOTE
    If the cylinder head bolts are loosened out of sequence, warpage or cracking could result.



    Click image to see an enlarged view

    Fig. Cylinder head bolt loosening sequence-RX 300

  30.  
  31. Remove the cylinder head gasket. With a gasket scraper, carefully remove all the old gasket material from the cylinder head and engine block surfaces.
  32.  

To install:

Click image to see an enlarged view

Fig. Cylinder head bolt tightening sequence-3.0L (1MZ-FE) engine

  1. Place the new cylinder head gasket onto the cylinder block.
  2.  
  3. Install the cylinder head, in sequence, using several steps, as follows:
    NOTE
    If any bolt does not meet the torque, replace it.


    NOTE
    The paint mark applied to the bolt in the 9 o-clock position and should now be in the 12 o-clock position.



    Cylinder head onto the gasket
     
    Cylinder head bolts lubricated with clean engine oil
     
    Tighten the bolts in sequence in 3 steps to 40 ft. lbs. (54 Nm).
     



    Mark the forward edge of each bolt with paint, then tighten each bolt, in proper sequence, an additional 90 degrees.
     
    Check that each painted mark is now at a 90 degrees angle to the front
     



    Remaining 8mm bolts, lubricated with engine oil. Tighten both bolts to 13 ft. lbs. (18 Nm).
     

  4.  
  5. Install the camshafts.
  6.  
  7. Check and adjust the valves.
  8.  
  9. Apply sealant to the cylinder heads where the camshaft supports meet the cylinder heads.
  10.  
  11. Install or connect the following:

    Cylinder head covers, using new gaskets
     
    Dipstick and power steering pump bracket
     
    Exhaust manifolds. Tighten the nuts to 36 ft. lbs. (49 Nm).
     
    EGR pipe to the right exhaust manifold
     
    Water outlet
     
    Intake manifold and the fuel rail assembly. Tighten the intake manifold nuts/bolts to 11 ft. lbs. (15 Nm).
     
    Air assist hose and the 2 water bypass hoses
     
    Water inlet pipe and cylinder head rear plate
     
    Timing belt rear cover and camshaft pulleys
     
    Timing belt
     
    Spark plugs and ignition coils
     
    Right engine wiring harness
     
    Wiring harness to the rear of the engine
     
    Left engine wiring harness
     
    Air intake chamber
     
    EGR pipe, using new gaskets
     

  12.  
  13. Connect the following vacuum hoses:

    The 2 TVV vacuum hoses
     
    The vacuum hose to the rear cylinder head plate
     
    Charcoal canister vacuum hose
     

  14.  
  15. Connect the following electrical wiring:

    TP sensor connector
     
    IAC valve connector
     
    EGR gas temperature connector
     
    Air conditioning idle up connector
     

  16.  
  17. Install or connect the following:

    Engine hanger and the intake chamber support
     
    Both power steering air hoses
     
    Power steering pressure tube to the intake chamber
     
    O 2 sensor connector to the pressure tube.
     
    Both ground straps, to the intake chamber
     
    DLC to the bracket
     

  18.  
  19. Connect the following hoses:

    Power brake booster vacuum hose
     
    PCV hose
     
    IAC valve vacuum hose
     

  20.  
  21. Install or connect the following:

    Emission control valve set and related vacuum hoses and connectors
     
    V-bank cover
     
    Pressure hose to the hydraulic motor
     
    Fuel lines to the fuel rail assembly
     
    Heater and radiator hoses
     
    Right engine mounting support
     
    both engine ground straps
     
    Upper front suspension brace, if removed. Tighten the nuts to 59 ft. lbs. (80 Nm).
     
    Cruise control actuator and bracket
     
    Air cleaner, air flow meter and air duct assembly
     
    Accelerator and throttle cables, if equipped with an automatic transaxle
     

  22.  
  23. Fill the cooling system.
  24.  
  25. Install or connect the following:

    Negative battery cable
     
    Heater air duct
     
    Left and right ventilator louvers
     
    Window washer hoses from the ventilator louvers
     
    Top cowl seal and panel
     
    Wiper and blade assembly
     

  26.  
  27. Start the engine and check for leaks.
  28.  
  29. Bleed the air from the cooling system.
  30.  
  31. Road test the vehicle and check for unusual noise, shock, slippage, correct shift points and smooth operation.
  32.  
  33. Recheck the coolant and engine oil levels.
  34.  

  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove or disconnect the following:

    Wiper and blade assembly
     
    Top cowl seal and panel
     
    Window washer hoses from the ventilator louvers
     
    Left and right ventilator louvers
     
    Heater air duct
     

  4.  
  5. Relieve the fuel pressure.
  6.  
  7. Remove or disconnect the following:
    NOTE
    Wait at least 90 seconds from the time the negative battery was disconnected to start work.



    Turn the ignition key to the OFF position
     
    Negative battery cable
     

  8.  
  9. Drain the cooling system.
  10.  
  11. Remove or disconnect the following:

    Accelerator and throttle cables, if equipped with an automatic transaxle
     
    Air cleaner cover, air flow meter and the air duct
     
    Front upper suspension brace
     
    Cruise control actuator and bracket, if equipped
     
    2 engine ground straps
     
    Right engine mounting support
     
    Radiator hoses
     
    2 heater hoses
     
    Fuel feed and return lines from the fuel rail assembly
     
    Pressure hose from the hydraulic motor
     
    V-bank cover
     

  12.  
  13. Disconnect the following vacuum hoses:

    Fuel pressure control Vacuum Switching Valve (VSV)
     
    Fuel pressure regulator
     
    Cylinder head rear plate
     
    Intake air control valve VSV
     
    Exhaust Gas Recirculation (EGR) vacuum modulator
     
    EGR valve
     

  14.  
  15. Disconnect the following wiring and hoses:

    Intake air control valve
     
    Fuel pressure regulator
     
    EGR VSV
     

  16.  
  17. Remove the 2 nuts and the emission control valve set.
  18.  
  19. Disconnect the following hoses;

    Brake booster vacuum hose
     
    PCV hose
     
    Intake air control valve vacuum hose
     

  20.  
  21. Remove or disconnect the following:

    Data Link Connector (DLC) from the mounting bracket
     
    2 ground straps from the intake chamber
     
    Hydraulic motor pressure hose from the intake chamber
     
    Right Oxygen (O 2 ) sensor connector from the power steering pressure tube
     
    2 nuts and the power steering pressure tube from the intake chamber
     
    Both power steering air hoses
     
    Engine hanger and the intake chamber support
     
    EGR pipe and gaskets
     

  22.  
  23. Disconnect the following wiring:

    Throttle Position (TP) sensor connector
     
    Idle Air Control (IAC) valve connector
     
    EGR gas temperature connector
     
    Air conditioning idle up connector
     

  24.  
  25. Disconnect the following vacuum hoses:

    2 vacuum hoses from the Thermal Vacuum Valve (TVV)
     
    Vacuum hose from the cylinder head rear plate
     
    Vacuum hose from the charcoal canister
     

  26.  
  27. Remove or disconnect the following:

    Air assist hose and the 2 water bypass hoses
     
    Air intake chamber
     
    Left engine wiring harness and move it aside
     
    Wiring harness from the rear of the engine
     
    Right engine wiring harness and move it aside
     
    Ignition coils and move them aside
     
    Timing belt
     
    Camshaft pulleys and the timing belt rear cover
     
    Cylinder head rear plate
     
    Water inlet pipe
     
    Air assist hose and vacuum hose
     
    Intake manifold and fuel rail assembly
     
    Water outlet
     
    EGR pipe from the right exhaust manifold
     
    Front exhaust pipe and exhaust manifolds
     
    Dipstick assembly and the power steering pump bracket
     
    Valve covers and the Camshaft Position (CMP) sensor
     
    Camshafts
     

  28.  
  29. Be sure the engine is at/or near ambient temperature and remove the 2 (1 on each head) 8mm recessed hex bolts. Loosen and remove the 8 head bolts evenly, in 3 passes, in the reverse order of the installation sequence. Carefully lift the head from the engine; if necessary to pry the head loose, take great care not to damage the mating surfaces. Place the head on wood blocks in a clean work area.
    NOTE
    If the cylinder head bolts are loosened out of sequence, warpage or cracking could result.



    Click image to see an enlarged view

    Fig. Cylinder head bolt loosening sequence-3.0L and 3.3L engines

  30.  
  31. Remove the cylinder head gasket. With a gasket scraper, carefully remove all the old gasket material from the cylinder head and engine block surfaces.
  32.  

To install:

Click image to see an enlarged view

Fig. Cylinder head bolt tightening sequence-3.0L and 3.3L engines engine

  1. Place the new cylinder head gasket onto the cylinder block.
  2.  
  3. Install the cylinder head, in sequence, using several steps, as follows:
    NOTE
    If any bolt does not meet the torque, replace it.


    NOTE
    The paint mark applied to the bolt in the 9 o-clock position and should now be in the 12 o-clock position.



    Cylinder head onto the gasket
     
    Cylinder head bolts lubricated with clean engine oil
     
    Tighten the bolts in sequence in 3 steps to 40 ft. lbs. (54 Nm).
     



    Mark the forward edge of each bolt with paint, then tighten each bolt, in proper sequence, an additional 90 degrees.
     
    Check that each painted mark is now at a 90 degrees angle to the front
     



    Remaining 8mm bolts, lubricated with engine oil. Tighten both bolts to 13 ft. lbs. (18 Nm).
     

  4.  
  5. Install the camshafts.
  6.  
  7. Check and adjust the valves.
  8.  
  9. Apply sealant to the cylinder heads where the camshaft supports meet the cylinder heads.
  10.  
  11. Install or connect the following:

    Cylinder head covers, using new gaskets
     
    Dipstick and power steering pump bracket
     
    Exhaust manifolds. Tighten the nuts to 36 ft. lbs. (49 Nm).
     
    EGR pipe to the right exhaust manifold
     
    Water outlet
     
    Intake manifold and the fuel rail assembly. Tighten the intake manifold nuts/bolts to 11 ft. lbs. (15 Nm).
     
    Air assist hose and the 2 water bypass hoses
     
    Water inlet pipe and cylinder head rear plate
     
    Timing belt rear cover and camshaft pulleys
     
    Timing belt
     
    Spark plugs and ignition coils
     
    Right engine wiring harness
     
    Wiring harness to the rear of the engine
     
    Left engine wiring harness
     
    Air intake chamber
     
    EGR pipe, using new gaskets
     

  12.  
  13. Connect the following vacuum hoses:

    The 2 TVV vacuum hoses
     
    The vacuum hose to the rear cylinder head plate
     
    Charcoal canister vacuum hose
     

  14.  
  15. Connect the following electrical wiring:

    TP sensor connector
     
    IAC valve connector
     
    EGR gas temperature connector
     
    Air conditioning idle up connector
     

  16.  
  17. Install or connect the following:

    Engine hanger and the intake chamber support
     
    Both power steering air hoses
     
    Power steering pressure tube to the intake chamber
     
    O 2 sensor connector to the pressure tube.
     
    Both ground straps, to the intake chamber
     
    DLC to the bracket
     

  18.  
  19. Connect the following hoses:

    Power brake booster vacuum hose
     
    PCV hose
     
    IAC valve vacuum hose
     

  20.  
  21. Install or connect the following:

    Emission control valve set and related vacuum hoses and connectors
     
    V-bank cover
     
    Pressure hose to the hydraulic motor
     
    Fuel lines to the fuel rail assembly
     
    Heater and radiator hoses
     
    Right engine mounting support
     
    both engine ground straps
     
    Upper front suspension brace, if removed. Tighten the nuts to 59 ft. lbs. (80 Nm).
     
    Cruise control actuator and bracket
     
    Air cleaner, air flow meter and air duct assembly
     
    Accelerator and throttle cables
     

  22.  
  23. Fill the cooling system.
  24.  
  25. Install or connect the following:

    Negative battery cable
     
    Heater air duct
     
    Left and right ventilator louvers
     
    Window washer hoses from the ventilator louvers
     
    Top cowl seal and panel
     
    Wiper and blade assembly
     

  26.  
  27. Start the engine and check for leaks.
  28.  
  29. Bleed the air from the cooling system.
  30.  
  31. Road test the vehicle and check for unusual noise, shock, slippage, correct shift points and smooth operation.
  32.  
  33. Recheck the coolant and engine oil levels.
  34.  

3.0L And 3.3L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Wiper and blade assembly
     
    Top cowl seal and panel
     
    Window washer hoses from the ventilator louvers
     
    Left and right ventilator louvers
     
    Heater air duct
     

  4.  
  5. Relieve the fuel pressure.
  6.  
  7. Remove or disconnect the following:

    Turn the ignition key to theOFF
     
    Negative battery cable
     

  8.  


NOTE
Wait at least 90 seconds from the time the negative battery was disconnected to start work.

  1. Drain the cooling system.
  2.  
  3. Remove or disconnect the following:

    Accelerator and throttle cables, if equipped with an automatic transaxle
     
    Air cleaner cover, air flow meter and the air duct
     
    Front upper suspension brace
     
    Cruise control actuator and bracket, if equipped
     
    2 engine ground straps
     
    Right engine mounting support
     
    Radiator hoses
     
    2 heater hoses
     
    Fuel feed and return lines from the fuel rail assembly
     
    Pressure hose from the hydraulic motor
     
    V-bank cover
     

  4.  
  5. Disconnect the following vacuum hoses:

    Fuel pressure control Vacuum Switching Valve (VSV)
     
    Fuel pressure regulator
     
    Cylinder head rear plate
     
    Intake air control valve VSV
     
    Exhaust Gas Recirculation (EGR) vacuum modulator
     
    EGR valve
     

  6.  
  7. Disconnect the following wiring and hoses:

    Intake air control valve
     
    Fuel pressure regulator
     
    EGR VSV
     

  8.  
  9. Remove the 2 nuts and the emission control valve set.
  10.  
  11. Disconnect the following hoses;

    Brake booster vacuum hose
     
    PCV hose
     
    Intake air control valve vacuum hose
     

  12.  
  13. Remove or disconnect the following:

    Data Link Connector (DLC) from the mounting bracket
     
    2 ground straps from the intake chamber
     
    Hydraulic motor pressure hose from the intake chamber
     
    Right Oxygen (O2) sensor connector from the power steering pressure tube
     
    2 nuts and the power steering pressure tube from the intake chamber
     
    Both power steering air hoses
     
    Engine hanger and the intake chamber support
     
    EGR pipe and gaskets
     

  14.  
  15. Disconnect the following wiring:

    Throttle Position (TP) sensor connector
     
    Idle Air Control (IAC) valve connector
     
    EGR gas temperature connector
     
    Air conditioning idle up connector
     

  16.  
  17. Disconnect the following vacuum hoses:

    2 vacuum hoses from the Thermal Vacuum Valve (TVV)
     
    Vacuum hose from the cylinder head rear plate
     
    Vacuum hose from the charcoal canister
     

  18.  
  19. Remove or disconnect the following:

    Air assist hose and the 2 water bypass hoses
     
    Air intake chamber
     
    Left engine wiring harness and move it aside
     
    Wiring harness from the rear of the engine
     
    Right engine wiring harness and move it aside
     
    Ignition coils and move them aside
     
    Timing belt
     
    Camshaft pulleys and the timing belt rear cover
     
    Cylinder head rear plate
     
    Water inlet pipe
     
    Air assist hose and vacuum hose
     
    Intake manifold and fuel rail assembly
     
    Water outlet
     
    EGR pipe from the right exhaust manifold
     
    Front exhaust pipe and exhaust manifolds
     
    Dipstick assembly and the power steering pump bracket
     
    Valve covers and the Camshaft Position (CMP) sensor
     
    Camshafts
     

  20.  
  21. Be sure the engine is at/or near ambient temperature and remove the 2 (1 on each head) 8mm recessed hex bolts. Loosen and remove the 8 head bolts evenly, in 3 passes, in the reverse order of the installation sequence. Carefully lift the head from the engine; if necessary to pry the head loose, take great care not to damage the mating surfaces. Place the head on wood blocks in a clean work area.
  22.  


NOTE
If the cylinder head bolts are loosened out of sequence, warpage or cracking could result.



Click image to see an enlarged view

Fig. Cylinder head bolt loosening sequence-3.0L and 3.3L engines

  1. Remove the cylinder head gasket. With a gasket scraper, carefully remove all the old gasket material from the cylinder head and engine block surfaces.
  2.  

To install:



Click image to see an enlarged view

Fig. Cylinder head bolt tightening sequence-3.0L and 3.3L engines engine

  1. Place the new cylinder head gasket onto the cylinder block.
  2.  
  3. Install the cylinder head, in sequence, using several steps, as follows:

    Cylinder head onto the gasket
     
    Cylinder head bolts lubricated with clean engine oil
     
    Tighten the bolts in sequence in 3 steps to 40 ft. lbs. (54 Nm).
     

  4.  


NOTE
If any bolt does not meet the torque, replace it.



Mark the forward edge of each bolt with paint, then tighten each bolt, in proper sequence, an additional 90 degrees.
 
Check that each painted mark is now at a 90 degrees angle to the front
 


NOTE
The paint mark applied to the bolt in the 9 o-clock position and should now be in the 12 o-clock position.



Remaining 8mm bolts, lubricated with engine oil. Tighten both bolts to 13 ft. lbs. (18 Nm).
 

  1. Install the camshafts.
  2.  
  3. Check and adjust the valves.
  4.  
  5. Apply sealant to the cylinder heads where the camshaft supports meet the cylinder heads.
  6.  
  7. Install or connect the following:

    Cylinder head covers, using new gaskets
     
    Dipstick and power steering pump bracket
     
    Exhaust manifolds. Tighten the nuts to 36 ft. lbs. (49 Nm).
     
    EGR pipe to the right exhaust manifold
     
    Water outlet
     
    Intake manifold and the fuel rail assembly. Tighten the intake manifold nuts/bolts to 11 ft. lbs. (15 Nm).
     
    Air assist hose and the 2 water bypass hoses
     
    Water inlet pipe and cylinder head rear plate
     
    Timing belt rear cover and camshaft pulleys
     
    Timing belt
     
    Spark plugs and ignition coils
     
    Right engine wiring harness
     
    Wiring harness to the rear of the engine
     
    Left engine wiring harness
     
    Air intake chamber
     
    EGR pipe, using new gaskets
     

  8.  
  9. Connect the following vacuum hoses:

    The 2 TVV vacuum hoses
     
    The vacuum hose to the rear cylinder head plate
     
    Charcoal canister vacuum hose
     

  10.  
  11. Connect the following electrical wiring:

    TP sensor connector
     
    IAC valve connector
     
    EGR gas temperature connector
     
    Air conditioning idle up connector
     

  12.  
  13. Install or connect the following:

    Engine hanger and the intake chamber support
     
    Both power steering air hoses
     
    Power steering pressure tube to the intake chamber
     
    O2 sensor connector to the pressure tube.
     
    Both ground straps, to the intake chamber
     
    DLC to the bracket
     

  14.  
  15. Connect the following hoses:

    Power brake booster vacuum hose
     
    PCV hose
     
    IAC valve vacuum hose
     

  16.  
  17. Install or connect the following:

    Emission control valve set and related vacuum hoses and connectors
     
    V-bank cover
     
    Pressure hose to the hydraulic motor
     
    Fuel lines to the fuel rail assembly
     
    Heater and radiator hoses
     
    Right engine mounting support
     
    both engine ground straps
     
    Upper front suspension brace, if removed. Tighten the nuts to 59 ft. lbs. (80 Nm).
     
    Cruise control actuator and bracket
     
    Air cleaner, air flow meter and air duct assembly
     
    Accelerator and throttle cables
     

  18.  
  19. Fill the cooling system.
  20.  
  21. Install or connect the following:

    Negative battery cable
     
    Heater air duct
     
    Left and right ventilator louvers
     
    Window washer hoses from the ventilator louvers
     
    Top cowl seal and panel
     
    Wiper and blade assembly
     

  22.  
  23. Start the engine and check for leaks.
  24.  
  25. Bleed the air from the cooling system.
  26.  
  27. Road test the vehicle and check for unusual noise, shock, slippage, correct shift points and smooth operation.
  28.  
  29. Recheck the coolant and engine oil levels.
  30.  

 
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