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Installation [11/2021 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSTALL CAMSHAFT 
    1. Apply a light coat of engine oil to the camshaft journals.
    2. Install the camshaft to the cylinder head sub-assembly.
  2. INSTALL NO. 2 CAMSHAFT 
    1. Apply a light coat of engine oil to the camshaft journals.
    2. Install the No. 2 camshaft to the cylinder head sub-assembly.
  3. INSTALL CAMSHAFT BEARING CAP (for Bank 2) 
    NOTE:

    When rotating the camshafts without the chain sub-assemblies installed, be careful to ensure that the valves do not contact the pistons. If contact occurs between the valves and pistons, damage may result.

    1. Make sure that the knock pin of each camshaft is positioned as shown in the illustration.
      GTY512937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Intake Side
      *b Exhaust Side
      *c 14°
      *d 44°
      *e Knock Pin
    2. Apply a light coat of engine oil to the camshaft housing RH and camshaft bearing caps.
    3. Confirm the marks and numbers on the No. 1 camshaft bearing cap, 6 No. 3 camshaft bearing caps and No. 4 camshaft bearing cap and place them in their proper positions and orientations.
      GTY516301Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Camshaft Bearing Cap
      *2 No. 3 Camshaft Bearing Cap
      *3 No. 4 Camshaft Bearing Cap
    4. Install the 20 bolts in the order shown in the illustration.

      Torque: 18.5 N.m (189 kgf/cm, 14 ft.lbf) 

      Fig 1: Camshaft Bearing Cap (For Bank 2) Tightening Sequence
      GTY1084018Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL OIL REFLECTOR PLATE RH 

    See step  44

  5. INSTALL NO. 3 CAMSHAFT SUB-ASSEMBLY 
    1. Apply a light coat of engine oil to the camshaft journals.
    2. Install the No. 3 camshaft sub-assembly to the cylinder head LH.
  6. INSTALL NO. 4 CAMSHAFT SUB-ASSEMBLY 
    1. Apply a light coat of engine oil to the camshaft journals.
    2. Install the No. 4 camshaft sub-assembly to the cylinder head LH.
  7. INSTALL CAMSHAFT BEARING CAP (for Bank 1) 
    NOTE:

    When rotating the camshafts without the chain sub-assemblies installed, be careful to ensure that the valves do not contact the pistons. If contact occurs between the valves and pistons, damage may result.

    1. Make sure the knock pin of each camshaft is positioned as shown in the illustration.
      GTY508196Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Intake Side
      *b Exhaust Side
      *c 4°
      *d Knock Pin
    2. Apply a light coat of engine oil to the camshaft housing LH and camshaft bearing caps.
    3. Confirm the marks and numbers on the No. 2 camshaft bearing cap, 6 No. 3 camshaft bearing caps and No. 4 camshaft bearing cap and place them in their proper positions and orientations.
      GTY500936Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 2 Camshaft Bearing Cap
      *2 No. 3 Camshaft Bearing Cap
      *3 No. 4 Camshaft Bearing Cap
    4. Install the 20 bolts in the order shown in the illustration.

      Torque: 18.5 N.m (189 kgf/cm, 14 ft.lbf) 

      Fig 2: Camshaft Bearing Cap (For Bank 1) Tightening Sequence
      GTY499586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSTALL OIL REFLECTOR PLATE LH 

    See step  43

  9. INSTALL NO. 2 CHAIN TENSIONER ASSEMBLY 

    See step  28

  10. INSTALL NO. 1 CHAIN SUB-ASSEMBLY (for Bank 2) 

    See step  29

  11. INSTALL CHAIN VIBRATION DAMPER RH 

    See step  30

  12. INSTALL CHAIN TENSIONER SLIPPER RH 

    See step  31

  13. INSTALL NO. 1 CHAIN TENSIONER ASSEMBLY RH 

    See step  32

  14. INSTALL NO. 3 CHAIN TENSIONER ASSEMBLY 

    See step  33

  15. INSTALL NO. 1 CHAIN SUB-ASSEMBLY (for Bank 1) 

    See step  34

  16. INSTALL CHAIN VIBRATION DAMPER LH 

    See step  35

  17. INSTALL CHAIN TENSIONER SLIPPER LH 

    See step  36

  18. INSTALL NO. 1 CHAIN TENSIONER ASSEMBLY LH 

    See step  37

  19. TIGHTEN CAMSHAFT TIMING GEAR ASSEMBLY (for Bank 1) 

    See step  38

  20. TIGHTEN CAMSHAFT TIMING GEAR ASSEMBLY (for Bank 2) 

    See step  39

  21. SET NO. 1 CYLINDER TO TDC / COMPRESSION 

    See step  38

  22. INSPECT VALVE CLEARANCE 

    See step  9

  23. ADJUST VALVE CLEARANCE 

    See step  10

  24. INSTALL TIMING CHAIN COVER ASSEMBLY 

    Refer to INSTALLATION [11/2021 - ]

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