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Home >> Lexus >> 2016 >> GS 350 Base, AWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - Service Information >> Engine Unit >> Disassembly [10/2015 - ] >> Procedure

Disassembly [10/2015 - ]: Procedure

  1. REMOVE SPARK PLUG 

    Refer to PROCEDURE - Step 5

  2. REMOVE OIL PAN DRAIN PLUG 
    1. Remove the drain plug and gasket.
  3. REMOVE NO. 1 ENGINE COVER 

    Refer to PROCEDURE - Step 18

  4. REMOVE NO. 1 FUEL TUBE SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 4

  5. REMOVE PCV VALVE SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 4

  6. REMOVE CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Intake Side of Bank 1) 

    Refer to PROCEDURE - Step 7

  7. REMOVE CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Exhaust Side of Bank 1) 

    Refer to PROCEDURE - Step 8

  8. REMOVE CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Intake Side of Bank 2) 

    Refer to PROCEDURE - Step 9

  9. REMOVE CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Exhaust Side of Bank 2) 

    Refer to PROCEDURE - Step 10

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

    Refer to PROCEDURE - Step 6

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

    Refer to PROCEDURE - Step 7

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

    Refer to PROCEDURE - Step 8

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

    Refer to PROCEDURE - Step 9

  14. REMOVE CRANKSHAFT POSITION SENSOR 

    Refer to PROCEDURE - Step 1

  15. REMOVE CYLINDER BLOCK WATER DRAIN COCK SUB-ASSEMBLY 
    1. Remove the water drain cock plug from the water drain cock.
      GTY622593Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a RH Side
      *b LH Side
    2. Remove the water drain cock from the cylinder block.
    3. Remove the taper screw plug from the cylinder block.
  16. REMOVE OIL FILTER CAP ASSEMBLY 

    Refer to PROCEDURE - Step 3

  17. REMOVE OIL FILTER BRACKET SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 16

  18. REMOVE CRANKSHAFT PULLEY 

    Refer to PROCEDURE - Step 17

  19. REMOVE WATER INLET SUB-ASSEMBLY WITH THERMOSTAT 
    1. Remove the 2 bolts, nut, water inlet sub-assembly with thermostat and gasket.
      GTY664453Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. REMOVE WATER OUTLET 
    1. Remove the 2 bolts and the water outlet.
      GTY664461Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the O-ring.
      GTY617833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. REMOVE REAR WATER BY-PASS JOINT 
    1. Remove the 4 bolts, 2 nuts and rear water by-pass joint.
      GTY664459Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 gaskets and O-ring.
      GTY616895Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. REMOVE VACUUM PUMP ASSEMBLY 

    Refer to PROCEDURE - Step 14

  23. REMOVE FUEL PUMP SPACER GASKET 
    1. Remove the fuel pump spacer gasket from the cylinder head cover.
  24. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 23

  25. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH 

    Refer to PROCEDURE - Step 22

  26. REMOVE SPARK PLUG TUBE GASKET 
    1. Remove the 6 spark plug tube gaskets.
      GTY664457Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      Be careful not to damage the gasket when removing it as the removed gasket needs to be used when installing a new one.

  27. REMOVE OIL PAN DRAIN PLUG 
    1. Remove the oil pan drain plug and gasket.
  28. REMOVE NO. 2 OIL PAN SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 25

  29. REMOVE OIL WITH STRAINER PIPE SUB-ASSEMBLY (for AWD) 

    Refer to PROCEDURE - Step 26

  30. REMOVE ENGINE OIL LEVEL SENSOR 

    Refer to PROCEDURE - Step 6

  31. REMOVE OIL LEVEL SENSOR BRACKET 

    Refer to PROCEDURE - Step 7

  32. REMOVE OIL PAN SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 29

  33. REMOVE OIL STRAINER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 30

  34. REMOVE NO. 1 OIL PAN BAFFLE PLATE 
    1. for 2WD:
      GTY664471Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the 8 bolts and No. 1 oil pan baffle plate.

    2. for AWD:
      GTY664470Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the 7 bolts and No. 1 oil pan baffle plate.

  35. REMOVE ENGINE REAR OIL SEAL RETAINER 
    1. Remove the 6 bolts.
      GTY542739Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a screwdriver, pry out the engine rear oil seal retainer.
      GTY616952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Pry
      NOTE:

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

      HINT: 

      Tape the screwdriver tip before use.

  36. REMOVE REAR CRANKSHAFT OIL SEAL 
    1. Place the oil seal retainer on wooden blocks.
      GTY675069Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Wooden Block
      *b Protective Tape
      NOTE:

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

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

      HINT: 

      Tape the screwdriver tip before use.

  37. REMOVE TIMING CHAIN COVER ASSEMBLY 

    Refer to PROCEDURE - Step 31

  38. REMOVE ENGINE WATER PUMP ASSEMBLY 

    Refer to PROCEDURE - Step 6

  39. REMOVE TIMING CHAIN CASE OIL SEAL 

    Refer to PROCEDURE - Step 32

  40. SET NO. 1 CYLINDER TO TDC/COMPRESSION 
    1. Temporarily install the pulley set bolt.
    2. Set the crankshaft pulley set key to the RH block bore center mark (TDC/compression).
      GTY634060Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Crankshaft Pulley Set Key
      *a Center Mark
    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.
      GTY641017Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Timing Mark

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

  41. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY 
    1. Move the stopper plate upward to release the lock, and push the plunger deep into the No. 1 chain tensioner assembly.
      GTY647688Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Plunger
      *b Stopper Plate
      *c 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 No. 1 chain tensioner assembly.
      GTY542736Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  42. REMOVE CHAIN TENSIONER SLIPPER 
    1. Remove the chain tensioner slipper.
  43. REMOVE CHAIN SUB-ASSEMBLY 
    1. Turn the crankshaft counterclockwise 10° to loosen the chain sub-assembly of the crankshaft timing sprocket.
      GTY651419Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Timing Mark
      *b Center Line
    2. Remove the pulley set bolt.
    3. Remove the chain sub-assembly from the crankshaft timing sprocket and place it on the crankshaft.
      GTY616778Courtesy 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.
      GTY627687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for Bank 1
    5. Remove the chain sub-assembly.
  44. 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.
      GTY598437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  45. REMOVE NO. 1 CHAIN VIBRATION DAMPER 
    1. Remove the 2 bolts and No. 1 chain vibration damper.
      GTY616783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  46. REMOVE NO. 2 CHAIN VIBRATION DAMPER 
    1. Remove the 2 No. 2 chain vibration dampers.
      GTY616791Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  47. REMOVE CRANKSHAFT TIMING GEAR OR SPROCKET 
    1. Remove the crankshaft timing sprocket from the crankshaft.
      GTY616798Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 pulley set keys from the crankshaft.
  48. REMOVE CAMSHAFT TIMING GEARS AND NO. 2 CHAIN (for Bank 1) 

    See step  6

  49. REMOVE NO. 2 CHAIN TENSIONER ASSEMBLY 

    See step  7

  50. REMOVE CAMSHAFT BEARING CAP (for Bank 1) 

    See step  8

  51. REMOVE FUEL PUMP LIFTER HOUSING 

    See step  9

  52. REMOVE CAMSHAFT 

    See step  39

  53. REMOVE NO. 2 CAMSHAFT 

    See step  38

  54. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY RH 

    See step  12

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

    See step  13

  56. REMOVE NO. 3 CHAIN TENSIONER ASSEMBLY 

    See step  14

  57. REMOVE CAMSHAFT BEARING CAP (for Bank 2) 

    See step  15

  58. REMOVE NO. 4 CAMSHAFT SUB-ASSEMBLY 

    See step  47

  59. REMOVE NO. 3 CAMSHAFT SUB-ASSEMBLY 

    See step  48

  60. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY LH 

    See step  18

  61. REMOVE OIL CONTROL VALVE FILTER LH 
    1. Remove the oil control valve filter LH from the camshaft bearing cap.
      GTY542761Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  62. REMOVE OIL CONTROL VALVE FILTER RH 
    1. Remove the oil control valve filter RH from the camshaft bearing cap.
  63. REMOVE CAMSHAFT BEARING CAP OIL HOLE GASKET 
    1. Remove the camshaft bearing cap oil hole gasket from the No. 6 camshaft bearing cap.
      GTY616796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the camshaft bearing cap oil hole gasket from the No. 7 camshaft bearing cap.
      GTY673434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  64. REMOVE NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY 

    See step  21

  65. REMOVE VALVE LASH ADJUSTER ASSEMBLY 

    See step  22

  66. REMOVE VALVE STEM CAP 

    See step  23

  67. REMOVE CYLINDER HEAD SUB-ASSEMBLY 

    See step  30

  68. REMOVE CYLINDER HEAD GASKET 

    See step  31

  69. REMOVE CYLINDER HEAD LH 

    See step  32

  70. REMOVE NO. 2 CYLINDER HEAD GASKET 

    See step  33

  71. REMOVE NO. 5 ENGINE WIRE 
    1. Detach the clamp and remove the No. 5 engine wire.
      GTY409829Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  72. REMOVE KNOCK SENSOR 

    Refer to PROCEDURE - Step 2

  73. REMOVE NO. 1 WATER OUTLET PIPE 
    1. Remove the 2 bolts and water outlet pipe.
      GTY616802Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  74. REMOVE CYLINDER BLOCK WATER JACKET SPACER 
    GTY677977Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the 2 water jacket spacers from the cylinder block.
      NOTE:

      Be sure to remove the water jacket spacers. If not, they may fall and become damaged when the cylinder block is inverted.

  75. REMOVE STRAIGHT PIN 
    NOTE:

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

  76. REMOVE RING PIN 
    NOTE:

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

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