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Home >> Lexus >> 2016 >> GS 450h Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical (Service Information) >> Engine Unit >> Disassembly [09/2014 - 10/2015] >> Procedure

Disassembly [09/2014 - 10/2015]: Procedure

  1. REMOVE OIL FILLER CAP SUB-ASSEMBLY 
    1. Remove the oil filler cap and gasket.
  2. REMOVE RADIATOR CAP SUB-ASSEMBLY 
  3. REMOVE SPARK PLUG 

    Refer to PROCEDURE - Step 7

  4. REMOVE OIL PAN DRAIN PLUG 
    1. Remove the drain plug and gasket.
  5. REMOVE PCV VALVE SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 4

  6. DISCONNECT NO. 2 WATER BY-PASS PIPE SUB-ASSEMBLY 

    See step  8

  7. REMOVE WATER BY-PASS HOSE ASSEMBLY 
  8. REMOVE NO. 2 SEPARATOR CASE 
    1. GTY399226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the 2 nuts, No. 2 separator case and O-ring.

  9. REMOVE VVT SENSOR (for Intake Side of Bank 1) 

    Refer to PROCEDURE - Step 2

  10. REMOVE VVT SENSOR (for Exhaust Side of Bank 1) 

    Refer to PROCEDURE - Step 3

  11. REMOVE VVT SENSOR (for Intake Side of Bank 2) 

    Refer to PROCEDURE - Step 4

  12. REMOVE VVT SENSOR (for Exhaust Side of Bank 2) 

    Refer to PROCEDURE - Step 5

  13. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Exhaust Side of Bank 1) 

    Refer to PROCEDURE - Step 2

  14. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Intake Side of Bank 1) 

    Refer to PROCEDURE - Step 3

  15. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Intake Side of Bank 2) 

    Refer to PROCEDURE - Step 5

  16. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Exhaust Side of Bank 2) 

    Refer to PROCEDURE - Step 4

  17. REMOVE CRANKSHAFT POSITION SENSOR 

    Refer to PROCEDURE - Step 2

  18. REMOVE CYLINDER BLOCK WATER DRAIN COCK SUB-ASSEMBLY 
    1. GTY530005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the water drain cocks from the cylinder block.

      TEXT IN ILLUSTRATION

      *a RH Side
      *b LH Side
    2. Remove the water drain cock plugs from the water drain cocks.
  19. REMOVE OIL FILTER ELEMENT 

    Refer to PROCEDURE - Step 3

  20. REMOVE CRANKSHAFT PULLEY 

    See step  4

  21. REMOVE WATER INLET SUB-ASSEMBLY 
    1. Separate the 3 water by-pass hoses.
      GTY418957Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 4 bolts, nut and water inlet.
      GTY409316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 2 O-rings.
      GTY102529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 3 water by-pass hoses.
      GTY409833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. REMOVE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY 
    1. Remove the 3 nuts and water inlet with thermostat.
      GTY415147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the gasket from the water inlet.
  23. REMOVE REAR WATER BY-PASS JOINT 
    1. Remove the 2 bolts, 4 nuts and water by-pass joint.
      GTY411195Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 gaskets and O-ring.
      GTY411194Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  24. REMOVE FUEL PUMP SPACER GASKET 
    1. Remove the fuel pump spacer gasket from the cylinder head cover.
  25. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY 

    See step  13

  26. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH 

    See step  12

  27. REMOVE SPARK PLUG TUBE GASKET 
    1. GTY527798Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Pry up the claws of the ventilation baffle plate.

      TEXT IN ILLUSTRATION

      *1 Claw
      NOTE:

      Do not deform the claws of the baffle plate more than necessary.

    2. GTY474048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Using a screwdriver as shown in the illustration, deform each spark plug tube gasket inwards and remove the 6 spark plug tube gaskets from the cylinder head cover.

      NOTE:
      • As much as possible prevent the plug tube gaskets from being deformed. The removed gaskets will be used when reinstalling the gaskets.
      • Do not damage the connection of the cylinder head cover.
      • Make sure not to damage the spark plug tube gasket and cylinder head cover when inserting the screwdriver in the joint area.

      HINT: 

      If the cylinder head cover is damaged, smooth the surface with 400-grit sandpaper.

  28. REMOVE OIL PAN DRAIN PLUG 
    1. Remove the oil pan drain plug and gasket.
  29. REMOVE NO. 2 OIL PAN SUB-ASSEMBLY 
    1. GTY532416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the 15 bolts and 2 nuts.

      TEXT IN ILLUSTRATION

      Bolt
      Nut
    2. Insert the blade of an oil pan seal cutter between the oil pans. Cut through the applied sealer and remove the No. 2 oil pan.
      GTY145991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Be careful not to damage the contact surfaces of the oil pans.

  30. REMOVE OIL PAN SUB-ASSEMBLY 
    1. Remove the 16 bolts and 2 nuts.
      GTY403316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      Bolt
      Nut

      HINT: 

      Be sure to clean the bolts and stud bolts and check the threads for cracks or other damage.

    2. Remove the oil pan by prying between the oil pan and cylinder block with a screwdriver.
      GTY526589Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a LH Side
      *b RH Side
      NOTE:

      Be careful not to damage the contact surfaces of the cylinder block and oil pan.

      HINT: 

      Tape the screwdriver tip before use.

    3. Remove the 2 O-rings.
      GTY463016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  31. REMOVE OIL STRAINER SUB-ASSEMBLY 
    1. GTY104825Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the 3 nuts, oil strainer and gasket.

    2. GTY104881Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the 8 bolts and baffle plate.

  32. REMOVE ENGINE REAR OIL SEAL RETAINER 
    1. Remove the 6 bolts.
      GTY102542Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a screwdriver, pry out the oil seal retainer.
      GTY418994Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      Pry
      NOTE:

      Be careful not to damage the engine rear oil seal retainer.

      HINT: 

      Tape the screwdriver tip before use.

  33. REMOVE REAR CRANKSHAFT OIL SEAL 
    1. Place the oil seal retainer on wooden blocks.
      GTY411285Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Wooden Block
      *2 Protective Tape
      NOTE:

      Be careful not to damage the engine rear oil seal retainer.

    2. Using a screwdriver and a hammer, tap out the oil seal.

      HINT: 

      Tape the screwdriver tip before use.

  34. REMOVE TIMING CHAIN COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 17

  35. REMOVE ENGINE WATER PUMP ASSEMBLY 

    Refer to PROCEDURE - Step 29

  36. REMOVE TIMING CHAIN CASE OIL SEAL 

    Refer to PROCEDURE - Step 18

  37. SET NO. 1 CYLINDER TO TDC/COMPRESSION 
    1. Temporarily install the pulley set bolt.
    2. Set the timing mark on the crank angle sensor plate to the RH block bore center line (TDC/compression).
      GTY416988Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Timing Mark
      *a Center Line
    3. Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the bearing cap as shown in the illustration.
      GTY531435Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Timing Mark

      If not, turn the crankshaft 1 revolution (360°) and align the timing marks as described above.

  38. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY 
    1. Move the stopper plate upward to release the lock, and push the plunger deep into the tensioner.
      GTY526494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Plunger
      *2 Stopper Plate
      *3 Pin
    2. Move the stopper plate downward to set the lock, and insert a pin of 1.27 mm (0.0500 in.) diameter into the stopper plate's hole.
    3. Remove the 2 bolts and chain tensioner.
      GTY104810Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  39. REMOVE CHAIN TENSIONER SLIPPER 
    1. Remove the chain tensioner slipper.
  40. REMOVE CHAIN SUB-ASSEMBLY 
    1. Turn the crankshaft counterclockwise 10° to loosen the chain of the crankshaft timing sprocket.
      GTY536555Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Timing Mark
      *a Center Line
    2. Remove the pulley set bolt.
    3. Remove the chain from the crankshaft timing sprocket and place it on the crankshaft.
      GTY102276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Turn the camshaft timing gear assembly on bank 1 clockwise (approximately 60°) and set it as shown in the illustration. Be sure to loosen the chain between the banks.
      GTY537046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A for Bank 1
    5. Remove the chain.
  41. REMOVE IDLE SPROCKET ASSEMBLY 
    1. Using a 10 mm hexagon wrench, remove the No. 2 idle gear shaft, idle sprocket and No. 1 idle gear shaft.
      GTY534641Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  42. REMOVE NO. 1 CHAIN VIBRATION DAMPER 
    1. Remove the 2 bolts and No. 1 chain vibration damper.
      GTY145941Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  43. REMOVE NO. 2 CHAIN VIBRATION DAMPER 
    1. Remove the 2 No. 2 chain vibration dampers.
      GTY418990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  44. REMOVE CRANKSHAFT TIMING SPROCKET 
    1. Remove the crankshaft timing sprocket from the crankshaft.
      GTY191932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 pulley set keys from the crankshaft.
  45. REMOVE CAMSHAFT TIMING GEARS AND NO. 2 CHAIN (for Bank 1) 

    See step  6

  46. REMOVE NO. 2 CHAIN TENSIONER ASSEMBLY 

    See step  7

  47. REMOVE CAMSHAFT BEARING CAP (for Bank 1) 

    See step  8

  48. REMOVE FUEL PUMP LIFTER HOUSING 

    See step  9

  49. REMOVE CAMSHAFT 
  50. REMOVE NO. 2 CAMSHAFT 
  51. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY RH 

    See step  12

  52. REMOVE CAMSHAFT TIMING GEARS AND NO. 2 CHAIN (for Bank 2) 

    See step  13

  53. REMOVE NO. 3 CHAIN TENSIONER ASSEMBLY 

    See step  14

  54. REMOVE CAMSHAFT BEARING CAP (for Bank 2) 

    See step  15

  55. REMOVE NO. 3 CAMSHAFT SUB-ASSEMBLY 
  56. REMOVE NO. 4 CAMSHAFT SUB-ASSEMBLY 
  57. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY LH 

    See step  18

  58. REMOVE OIL CONTROL VALVE FILTER LH 
    1. GTY416757Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the oil control valve filter LH from the camshaft bearing cap.

  59. REMOVE OIL CONTROL VALVE FILTER RH 
    1. Remove the oil control valve filter RH from the camshaft bearing cap.
  60. REMOVE OIL CHECK VALVE 
    1. GTY399220Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the oil check valve from the camshaft bearing cap.

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

    See step  21

  62. REMOVE VALVE LASH ADJUSTER ASSEMBLY 

    See step  22

  63. REMOVE VALVE STEM CAP 

    See step  23

  64. REMOVE CYLINDER HEAD SUB-ASSEMBLY 

    See step  30

  65. REMOVE CYLINDER HEAD GASKET 
  66. REMOVE CYLINDER HEAD LH 

    See step  32

  67. REMOVE NO. 2 CYLINDER HEAD GASKET 
  68. REMOVE NO. 5 ENGINE WIRE 
    1. GTY409829Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Detach the clamp and remove the No. 5 engine wire.

  69. REMOVE KNOCK SENSOR 

    Refer to PROCEDURE - Step 2

  70. REMOVE WATER OUTLET PIPE SUB-ASSEMBLY 
    1. Remove the 2 bolts and water outlet pipe.
      GTY104468Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  71. REMOVE NO. 1 STRAIGHT PIN 
    NOTE:

    It is not necessary to remove a No. 1 straight pin unless it is being replaced.

  72. REMOVE RING PIN 
    NOTE:

    It is not necessary to remove a ring pin unless it is being replaced.

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