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Home >> Lexus >> 2024 >> RC 350 Base, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical System (2GR-FKS) - Service Information (1 Of 2) >> Camshaft >> Removal [11/2017 - ] >> Procedure

Removal [11/2017 - ]: Procedure

  1. DRAIN ENGINE COOLANT 

    Refer to PROCEDURE - Step 2

  2. PRECAUTION 
    NOTE:

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work.

    Refer to PRECAUTION [11/2017 - 09/2020] , or refer to PRECAUTION [09/2020 - ]

  3. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
  4. REMOVE BATTERY 

    Refer to PROCEDURE - Step 3

  5. REMOVE NO. 1 BATTERY TRAY SUPPORT 

    Refer to PROCEDURE - Step 4

  6. REMOVE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (for High Pressure) 

    Refer to REMOVAL [11/2017 - ]

  7. SEPARATE WIRE HARNESS 
    1. Remove the bolt, 4 nuts, 5 clamps and 2 connectors and separate the wire harness.
      GTY813139Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Bolt Nut
      connector - -
  8. DISCONNECT INLET HEATER WATER HOSE A 

    See step  28

  9. DISCONNECT OUTLET HEATER WATER HOSE A 

    See step  29

  10. SEPARATE NO. 2 WATER BY-PASS PIPE 

    Refer to PROCEDURE - Step 12

  11. REMOVE VACUUM PUMP ASSEMBLY 

    Refer to PROCEDURE - Step 13

  12. REMOVE WIRE HARNESS CLAMP BRACKET 
    1. Disengage the wire harness clamp from the wire harness clamp bracket.
      GTY642231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 2 bolts and the wire harness clamp bracket from cylinder head cover sub-assembly LH.
    3. Remove the bolt and the wire harness clamp bracket from the cylinder head cover sub-assembly LH.
      GTY823495Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. REMOVE NO. 1 RADIATOR HOSE 

    Refer to PROCEDURE - Step 11

  14. REMOVE NO. 2 RADIATOR HOSE SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 14

  15. REMOVE WATER OUTLET SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 12

  16. REMOVE IGNITION COIL ASSEMBLY 

    Refer to PROCEDURE - Step 6

  17. REMOVE NO. 2 ENGINE OIL LEVEL DIPSTICK GUIDE 

    Refer to PROCEDURE - Step 10

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

    Refer to PROCEDURE - Step 7

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

    Refer to PROCEDURE - Step 8

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

    Refer to PROCEDURE - Step 9

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

    Refer to PROCEDURE - Step 10

  22. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 20

  23. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH 

    Refer to PROCEDURE - Step 20

  24. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 21

  25. REMOVE SPARK PLUG TUBE GASKET 

    Refer to PROCEDURE - Step 22

  26. REMOVE TIMING CHAIN COVER PLATE 
    1. Remove the 4 bolts, timing chain cover plate and timing gear or chain cover gasket.
      GTY589480Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  27. SET NO. 1 CYLINDER TO TDC/COMPRESSION 
    1. Turn the crankshaft clockwise to align the timing mark (cutout) on the crankshaft pulley with the "0" timing mark on the timing chain cover assembly.
      GTY775008Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a "0" Timing Mark
      *b Timing Mark (cutout)
    2. GTY829615Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for Bank 2
      *B for Bank 1
      *a Paint Mark (yellow)
      *b Timing Mark

      Check that the timing marks of the camshaft timing gear assemblies are aligned with the timing marks of the camshaft bearing caps as shown in the illustration.

      HINT: 

      If the marks are not aligned, turn the crankshaft again to align the marks.

    3. Place paint marks on the timing marks and sprockets of each camshaft timing gear assembly and on the links of the chain sub-assembly.

      HINT: 

      Be sure to place the paint marks on 2 links of the chain sub-assembly and on the sprockets of the camshaft timing gear assemblies at the locations of the timing marks of the camshaft timing gear assemblies.

  28. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY 
    1. Turn the crankshaft approximately 30° counterclockwise so that there is some slack in the chain sub-assembly.

      HINT: 

      This prevents the valves and pistons from interfering with each other.

      GTY827557Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 30°
    2. GTY806383Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Lever Hole
      *b Tensioner Hole

      Align the hole in the lever of the No. 1 chain tensioner assembly with the hole in the tensioner body as shown in the illustration, and then insert a pin with a diameter of 1.0 mm (0.0394 in.) into the hole.

      NOTE:

      Check that the pin is locked.

    3. Turn the crankshaft clockwise to align the timing mark (cutout) on the crankshaft pulley with the "0" timing mark on the timing chain cover assembly.
      GTY775008Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a "0" Timing Mark
      *b Timing Mark (cutout)
    4. Remove the 2 bolts and No. 1 chain tensioner assembly.
      GTY589483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not drop the No. 1 chain tensioner assembly or bolts into the timing chain cover assembly.

  29. DISCONNECT CHAIN SUB-ASSEMBLY (for Bank 1) 
    1. GTY789458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 30°

      Turn the crankshaft clockwise until it is in the position shown in the illustration so that there is some slack in the chain sub-assembly between the banks.

      WARNING:

      As the camshafts may turn suddenly, do not touch the camshafts or camshaft timing gears.

      HINT: 

      When turning the crankshaft, engine oil may spray out of the oil holes.

    2. GTY808817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 5° to 10°

      Turn the crankshaft clockwise until it is in the position shown in the illustration so that the chain sub-assembly can be removed easily.

      HINT: 

      When turning the crankshaft, engine oil may spray out of the oil holes.

    3. Remove the chain sub-assembly from the sprocket of the camshaft timing gear assembly and set it on the camshaft timing gear assembly.
      GTY551679Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WARNING:

      As the camshaft may turn suddenly and pinch your fingers when the chain sub-assembly is removed, pinch the chain sub-assembly and lift it upward to remove it from the sprocket.

  30. REMOVE NO. 2 CHAIN TENSIONER ASSEMBLY 
    1. Remove the bolt of the No. 2 chain tensioner assembly.
      GTY551680Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  31. REMOVE CAMSHAFT TIMING GEAR BOLT (for Intake Side of Bank 1) 
    1. Use a wrench to hold the hexagonal portion of the camshaft and remove the camshaft timing gear bolt from the camshaft timing gear assembly.
      GTY789837Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Hold
      Turn
      NOTE:

      Be careful not to damage the camshaft or camshaft housing sub-assembly with the wrench.

  32. REMOVE CAMSHAFT TIMING GEAR BOLT (for Exhaust Side of Bank 1) 
    1. Hold the hexagonal portion of the No. 2 camshaft with a wrench and remove the camshaft timing gear bolt from the camshaft timing exhaust gear assembly RH.
      GTY777397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Hold
      Turn
      NOTE:

      Be careful not to damage the No. 2 camshaft or camshaft housing sub-assembly with the wrench.

  33. REMOVE CAMSHAFT BEARING CAP (for Bank 1) 
    1. Slide the camshaft timing gear assembly and camshaft timing exhaust gear assembly RH as shown in the illustration.
      GTY668723Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Fig 1: Camshaft Bearing Cap Bolts Loosening Sequence (For Bank 1)
      GTY837345Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Replacement Bolt and Washer
      *b Part Removal
      *c Replacement Bolt and Washer Installation

      Remove the bolts and camshaft bearing caps in the order shown in the illustration. Immediately after removing a camshaft bearing cap, install replacement bolts and washers in the order shown in the illustration.

      Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

      NOTE:
      • Do not install the camshaft bearing caps when installing replacement bolts and washers.
      • Be sure to follow the numerical order when performing this procedure.
      • Do not allow replacement bolts or washers to contact the camshaft.
      • Do not drop replacement bolts or washers into the cylinder head sub-assembly.

      HINT: 

      • Arrange the removed parts so that they can be reinstalled in their original locations.
      • Part number for replacement bolts: 91551-F0850 (9 bolts)
      • Part number for replacement washers: 90201-12028 (18 washers)
  34. REMOVE NO. 2 CAMSHAFT 
    1. GTY626544Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      While lifting up the camshaft timing exhaust gear assembly RH, remove the No. 2 chain tensioner assembly.

    2. Lift up the rear of the No. 2 camshaft so that it is at an angle.
    3. Pull the No. 2 camshaft as shown in the illustration to remove it from the camshaft timing exhaust gear assembly RH.
      GTY551696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  35. REMOVE CAMSHAFT 
    1. Lift up the rear of the camshaft so that it is at an angle.
    2. Pull the camshaft as shown in the illustration to remove it from the camshaft timing gear assembly.
      GTY551697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  36. REMOVE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY RH (for Bank 1) 
    1. Remove the camshaft timing exhaust gear assembly RH.
      GTY551692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  37. REMOVE CAMSHAFT TIMING GEAR ASSEMBLY (for Bank 1) 
    1. Remove the camshaft timing gear assembly and No. 2 chain sub-assembly.
      GTY824533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not drop the chain sub-assembly into the gap between the engine and timing chain cover assembly.

    2. Suspend the chain sub-assembly with a string or equivalent.
      GTY551691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  38. DISCONNECT CHAIN SUB-ASSEMBLY (for Bank 2) 
    1. Turn the crankshaft counterclockwise to align the timing mark (cutout) on the crankshaft pulley with the "0" timing mark on the timing chain cover assembly.
      GTY775007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a "0" Timing Mark
      *b Timing Mark (cutout)
    2. GTY101216Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Remove the chain sub-assembly from the sprocket of the camshaft timing gear assembly and set it on the camshaft timing gear assembly.

      WARNING:

      As the camshaft may turn suddenly and pinch your fingers when the chain sub-assembly is removed, pinch the chain sub-assembly and lift it upward to remove it from the sprocket.

  39. DISCONNECT NO. 3 CHAIN TENSIONER ASSEMBLY 
    1. Remove the bolt to separate the No. 3 chain tensioner assembly from the camshaft housing sub-assembly LH.
      GTY600426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  40. REMOVE CAMSHAFT TIMING GEAR BOLT (for Intake Side of Bank 2) 
    1. Use a wrench to hold the hexagonal portion of the No. 3 camshaft sub-assembly and remove the camshaft timing gear bolt from the camshaft timing gear assembly.
      GTY782489Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Hold
      Turn
      NOTE:

      Be careful not to damage the No. 3 camshaft sub-assembly or cylinder head LH with the wrench.

  41. REMOVE CAMSHAFT TIMING GEAR BOLT (for Exhaust Side of Bank 2) 
    1. Use a wrench to hold the hexagonal portion of the No. 4 camshaft sub-assembly and remove the camshaft timing gear bolt from the camshaft timing exhaust gear assembly LH.
      GTY791788Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Hold
      Turn
      NOTE:

      Be careful not to damage the No. 4 camshaft sub-assembly or cylinder head LH with the wrench.

  42. REMOVE CAMSHAFT BEARING CAP (for Bank 2) 
    1. Slide the camshaft timing gear assembly and camshaft timing exhaust gear assembly LH as shown in the illustration.
      GTY668722Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolts and camshaft bearing caps in the order shown in the illustration. Immediately after removing a camshaft bearing cap, install replacement bolts and washers in the order shown in the illustration.
      Fig 2: Camshaft Bearing Cap Bolts Loosening Sequence (For Bank 2)
      GTY826867Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Replacement Bolt and Washer
      *b Part Removal
      *c Replacement Bolt and Washer Installation

      Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

      NOTE:
      • Do not install the camshaft bearing caps when installing replacement bolts and washers.
      • Be sure to follow the numerical order when performing this procedure.
      • Do not allow replacement bolts or washers to contact the camshaft.
      • Do not drop replacement bolts or washers into the cylinder head LH.

      HINT: 

      • Arrange the removed parts so that they can be reinstalled in their original locations.
      • Part number for replacement bolts: 91551-F0850 (8 bolts)
      • Part number for replacement washers: 90201-12028 (16 washers)
  43. REMOVE NO. 4 CAMSHAFT SUB-ASSEMBLY 
    1. While lifting up the camshaft timing exhaust gear assembly LH, remove the No. 3 chain tensioner assembly.
      GTY626548Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Lift up the rear of the No. 4 camshaft sub-assembly so that it is at an angle.
    3. Pull the No. 4 camshaft sub-assembly toward the rear of the vehicle to remove it from the camshaft timing exhaust gear assembly LH.
      GTY551710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  44. REMOVE NO. 3 CAMSHAFT SUB-ASSEMBLY 
    1. Lift up the rear of the No. 3 camshaft sub-assembly so that it is at an angle.
    2. Pull the No. 3 camshaft sub-assembly as shown in the illustration to remove it from the camshaft timing gear assembly.
      GTY551706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  45. REMOVE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY LH (for Bank 2) 
    1. Remove the camshaft timing exhaust gear assembly LH.
      GTY551707Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  46. REMOVE CAMSHAFT TIMING GEAR ASSEMBLY (for Bank 2) 
    1. Remove the camshaft timing gear assembly and No. 2 chain sub-assembly.
      GTY824534Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not drop the chain sub-assembly into the gap between the engine and timing chain cover assembly.

    2. Suspend the chain sub-assembly with a string or equivalent.
      GTY600430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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