LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2014 >> IS 350 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Engine Mechanical System (4GR-FSE) - Service Information (1 Of 2)) >> Cylinder Head Gasket >> Removal [04/2013 - 08/2015] >> Procedure

Removal [04/2013 - 08/2015]: Procedure

WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. REMOVE TIMING CHAIN OR BELT COVER SUB-ASSEMBLY 

    Refer to REMOVAL [04/2013 - 10/2017]

  2. SET NO. 1 CYLINDER TO TDC / COMPRESSION 

    Refer to PROCEDURE - Step 46

  3. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY 

    Refer to PROCEDURE - Step 47

  4. REMOVE CHAIN TENSIONER SLIPPER 

    Refer to PROCEDURE - Step 48

  5. REMOVE CHAIN SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 49

  6. REMOVE CAMSHAFT TIMING GEARS AND NO. 2 CHAIN (for Bank 1) 
    1. While raising the No. 2 chain tensioner assembly, insert a pin of 1.0 mm (0.0394 in.) diameter into the hole to hold the No. 2 chain tensioner assembly.
      GTY464236Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Pin
      *2 Plunger
      *a Push
    2. Using SST to hold the hexagonal portion of each camshaft, loosen the flange bolts of the camshaft timing gear assembly and the camshaft timing exhaust gear assembly RH.
      GTY469839Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Turn
      *b Hold
      • SST: 09922-10010 
      NOTE:
      • Be careful not to damage the cylinder head sub-assembly with SST.
      • Do not loosen the other bolts. If any of the bolts is loosened, replace the camshaft timing gear assembly and/or the camshaft timing exhaust gear assembly RH with a new one.
    3. Remove the 2 bolts, camshaft timing gear assembly and camshaft timing exhaust gear assembly RH together with the No. 2 chain sub-assembly.
    4. Remove the No. 2 chain sub-assembly.
  7. REMOVE NO. 2 CHAIN TENSIONER ASSEMBLY 
    1. Remove the bolt and No. 2 chain tensioner assembly.
      GTY136423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. REMOVE CAMSHAFT BEARING CAP (for Bank 1) 
    1. Check that the camshafts are positioned as shown in the illustration.
      GTY460081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Knock Pin
      *a IN
      *b EX
      *c 45°
    2. Uniformly loosen and remove the 9 bolts in several steps and in the sequence shown in the illustration.
      Fig 1: Camshaft Bearing Cap Bolts Loosening Sequence (Bank 1) (1 Of 2)
      GTY467675Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Uniformly loosen and remove the 14 bolts in several steps and in the sequence shown in the illustration.
      Fig 2: Camshaft Bearing Cap Bolts Loosening Sequence (Bank 1) (2 Of 2)
      GTY470238Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Uniformly loosen the bolts while keeping the camshafts level.

    4. Remove the 6 camshaft bearing caps.

      HINT: 

      Arrange the removed parts in the correct order.

  9. REMOVE CAMSHAFT 
    1. Remove the camshaft from the camshaft housing sub-assembly RH.
  10. REMOVE NO. 2 CAMSHAFT 
    1. Remove the No. 2 camshaft from the camshaft housing sub-assembly RH.
  11. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY RH 
    1. Remove the camshaft housing sub-assembly RH by prying between the cylinder head sub-assembly and camshaft housing sub-assembly RH with a screwdriver.
      GTY459708Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Protective Tape
      NOTE:

      Be careful not to damage the contact surfaces of the cylinder head sub-assembly and camshaft housing sub-assembly RH.

      HINT: 

      Tape the screwdriver tip before use.

  12. REMOVE CAMSHAFT TIMING GEARS AND NO. 2 CHAIN (for Bank 2) 
    1. While pushing down the No. 3 chain tensioner assembly, insert a pin of 1.0 mm (0.0394 in.) diameter into the hole to hold the No. 3 chain tensioner assembly.
      GTY460441Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Pin
      *2 Plunger
      *a Push
    2. Using SST to hold the hexagonal portion of each camshaft sub-assembly, loosen the flange bolts of the camshaft timing gear assembly and the camshaft timing exhaust gear assembly LH.
      GTY456258Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Turn
      *b Hold
      • SST: 09922-10010 
      NOTE:
      • Be careful not to damage the cylinder head LH with SST.
      • Do not loosen the other bolts. If any of the bolts is loosened, replace the camshaft timing gear assembly and/or the camshaft timing exhaust gear assembly LH with a new one.
    3. Remove the 2 bolts, camshaft timing gear assembly and camshaft timing exhaust gear assembly LH together with the No. 2 chain sub-assembly.
    4. Remove the No. 2 chain sub-assembly.
  13. REMOVE NO. 3 CHAIN TENSIONER ASSEMBLY 
    1. Remove the bolt and No. 3 chain tensioner assembly.
      GTY145648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. REMOVE CAMSHAFT BEARING CAP (for Bank 2) 
    1. Check that the camshafts are positioned as shown in the illustration.
      GTY456137Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Knock Pin
      *a IN
      *b EX
    2. Uniformly loosen and remove the 8 bolts in several steps and in the sequence shown in the illustration.
      Fig 3: Camshaft Bearing Cap Bolts Loosening Sequence (Bank 2) (1 Of 2)
      GTY457149Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Uniformly loosen and remove the 13 bolts in several steps and in the sequence shown in the illustration.
      Fig 4: Camshaft Bearing Cap Bolts Loosening Sequence (Bank 2) (2 Of 2)
      GTY459498Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Uniformly loosen the bolts while keeping the camshaft level.

    4. Remove the 5 camshaft bearing caps.

      HINT: 

      Arrange the removed parts in the correct order.

  15. REMOVE NO. 3 CAMSHAFT SUB-ASSEMBLY 
    1. Remove the No. 3 camshaft sub-assembly from the camshaft housing sub-assembly LH.
  16. REMOVE NO. 4 CAMSHAFT SUB-ASSEMBLY 
    1. Remove the No. 4 camshaft sub-assembly from the camshaft housing sub-assembly LH.
  17. REMOVE CAMSHAFT HOUSING SUB-ASSEMBLY LH 
    1. Remove the camshaft housing sub-assembly LH by prying between the cylinder head LH and camshaft housing sub-assembly LH with a screwdriver.
      GTY458967Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Protective Tape
      NOTE:

      Be careful not to damage the contact surfaces of the cylinder head LH and camshaft housing sub-assembly LH.

      HINT: 

      Tape the screwdriver tip before use.

  18. REMOVE NO. 1 CHAIN VIBRATION DAMPER 

    Refer to PROCEDURE - Step 51

  19. REMOVE NO. 2 CHAIN VIBRATION DAMPER 

    Refer to PROCEDURE - Step 52

  20. REMOVE NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY 
    1. Remove the 24 No. 1 valve rocker arm sub-assemblies.

      HINT: 

      Arrange the removed parts in the correct order.

  21. REMOVE VALVE LASH ADJUSTER ASSEMBLY 
    1. Remove the 24 valve lash adjuster assemblies.

      HINT: 

      Arrange the removed parts in the correct order.

  22. REMOVE VALVE STEM CAP 
    1. Remove the 24 valve stem caps.

      HINT: 

      Arrange the removed parts in the correct order.

  23. REMOVE REAR WATER BY-PASS JOINT 

    Refer to PROCEDURE - Step 31

  24. REMOVE NO. 3 FUEL PIPE SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 2

  25. REMOVE NO. 2 FUEL DELIVERY PIPE SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 3

  26. REMOVE FUEL DELIVERY PIPE SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 4

  27. REMOVE FUEL INJECTOR ASSEMBLY 

    Refer to PROCEDURE - Step 5

  28. REMOVE FUEL INJECTOR SEAL 

    Refer to PROCEDURE - Step 6

  29. REMOVE CYLINDER HEAD SUB-ASSEMBLY 
    1. Using a 10 mm bi-hexagon wrench, uniformly loosen the 8 cylinder head set bolts in the sequence shown in the illustration.
      Fig 5: Cylinder Head Set Bolts Loosening Sequence
      GTY470477Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 8 cylinder head set bolts and plate washers.
      NOTE:
      • Be careful not to drop the plate washers into the cylinder head sub-assembly.
      • Cylinder head warpage or cracking could result from removing cylinder head set bolts in an incorrect order.

      HINT: 

      Be sure to keep separate the removed parts for each installation position.

    3. Remove the cylinder head sub-assembly.
  30. REMOVE CYLINDER HEAD GASKET 
    1. Remove the cylinder head gasket.
      NOTE:
      • Clean the bolt holes of the cylinder block sub-assembly and check for damaged.
      • If the bolt holes are damaged, repair them with a tap.
  31. REMOVE CYLINDER HEAD LH 
    1. Uniformly loosen and remove the 2 bolts in the sequence shown in the illustration.
      Fig 6: Cylinder Head LH Loosening Sequence (1 Of 2)
      GTY463538Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a 10 mm bi-hexagon wrench, uniformly loosen the 8 cylinder head set bolts in the sequence shown in the illustration.
      Fig 7: Cylinder Head LH Loosening Sequence (2 Of 2)
      GTY456879Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the 8 cylinder head set bolts and plate washers.
      NOTE:
      • Be careful not to drop plate washers into the cylinder head LH.
      • Cylinder head LH warpage or cracking could result from removing cylinder head set bolts in an incorrect order.

      HINT: 

      Be sure to keep separate the removed parts for each installation position.

    4. Remove the cylinder head LH.
  32. REMOVE NO. 2 CYLINDER HEAD GASKET 
    1. Remove the No. 2 cylinder head gasket.
      NOTE:
      • Clean the bolt holes of the cylinder block sub-assembly and check for damaged.
      • If the bolt holes are damaged, repair them with a tap.
  33. INSPECT CYLINDER HEAD FOR FLATNESS 

    Refer to PROCEDURE - Step 1

  34. INSPECT CYLINDER HEAD FOR CRACKS 

    Refer to PROCEDURE - Step 2

  35. INSPECT CYLINDER HEAD SET BOLT 

    Refer to PROCEDURE - Step 6

scientia non olet · About LEMON Manuals