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Home › Lexus › 2007 › SC 430 › Repair and Diagnosis › Engine Mechanical › Mechanical › Engine Mechanical › Timing Belt › Removal

Timing Belt: Removal

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
  2. REMOVE NO. 1 AIR CLEANER INLET (See  REMOVAL   ) 
  3. DRAIN ENGINE COOLANT (See  COOLANT  ) 
  4. REMOVE V-BANK COVER (See  REMOVAL   ) 
  5. REMOVE INTAKE AIR CONNECTOR PIPE (See  REMOVAL   ) 
  6. REMOVE ENGINE UNDER COVER 
  7. DISCONNECT NO. 1 RADIATOR HOSE (See  REMOVAL  ) 
  8. DISCONNECT NO. 2 RADIATOR HOSE (See  REMOVAL  ) 
  9. DISCONNECT NO. 1 OIL COOLER INLET TUBE (See  DISASSEMBLY  ) 
  10. DISCONNECT NO. 1 OIL COOLER OUTLET TUBE (See  DISASSEMBLY  ) 
  11. REMOVE AIR CLEANER ASSEMBLY (See  REMOVAL   ) 
  12. REMOVE RADIATOR ASSEMBLY (See  DISASSEMBLY  ) 
  13. REMOVE FAN AND GENERATOR V BELT (See  REMOVAL   ) 
  14. REMOVE VANE PUMP ASSEMBLY 
    1. Remove the 2 bolts, nut and pump.

      HINT:

      The pump should be removed with the hoses connected. Then hang it with a rope or wire on the vehicle body's side.

  15. REMOVE GENERATOR ASSEMBLY (See  REMOVAL  ) 
  16. DISCONNECT COOLER COMPRESSOR ASSEMBLY 
    1. Remove the 3 bolts, nut, stay and wire bracket, and disconnect the cooler compressor.

      HINT:

      The cooler compressor (together with magnetic clutch) should be disconnected with the low-pressure and high-pressure hoses connected, and then hung with a rope or wire on the vehicle body's side.

  17. REMOVE NO. 3 TIMING BELT COVER SUB-ASSEMBLY RH 
    1. Disconnect the 2 PS air hoses from the clamp on the timing belt cover.
    2. Remove the cap nut, 3 bolts, timing belt cover and gasket.
      Fig 1: Locating Timing Belt Cover Bolts
      G05288695Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. REMOVE NO. 3 TIMING BELT COVER SUB-ASSEMBLY LH 
    1. Remove the cap nut and disconnect the No. 3 water bypass pipe from the timing belt cover.
    2. Disconnect the 2 water bypass hoses from the No. 3 water bypass pipe.
      Fig 2: Identifying Water Bypass Hoses
      G05288696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the engine wire from the 2 wire clamps.
    4. Disconnect the camshaft position sensor connector.
    5. Disconnect the camshaft position sensor wire from the wire clamp on the timing belt cover.
    6. Remove the wire grommet from the timing belt cover.
    7. Remove the 4 bolts.
    8. Disconnect the timing belt cover from the timing plate and camshaft bearing cap.
    9. Disconnect the wire clamp for the sensor from the timing belt cover.
    10. Remove the connector holder from the sensor connector.
    11. Remove the timing belt cover.
      Fig 3: Locating Timing Belt Cover Bolts And Connector
      G05288697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  19. REMOVE NO. 2 IDLER PULLEY SUB-ASSEMBLY 
    1. Remove the pulley bolt, cover plate and idler pulley.
      Fig 4: Locating Pulley Bolt
      G05288698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. REMOVE NO. 2 TIMING BELT COVER SUB-ASSEMBLY 
    1. Remove the 2 bolts and timing belt cover.
      Fig 5: Locating Timing Belt Cover Bolts
      G05288699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. REMOVE V-RIBBED BELT TENSIONER ASSEMBLY 
    1. Remove the bolt, 2 nuts and belt tensioner.
      Fig 6: Locating V-Ribbed Belt Tensioner Assembly Bolt And Nuts
      G05288700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. REMOVE IDLER PULLEY ASSEMBLY 
    1. Remove the 2 bolts, 2 nuts and idler pulley.
      Fig 7: Locating Idler Pulley Assembly Bolts And Nuts
      G05288701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  23. REMOVE CRANKSHAFT PULLEY 
    1. Using SST, remove the pulley bolt.

      SST 09213-70011,09330-00021 

      Fig 8: Removing Pulley Bolt
      G05288702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using SST, remove the pulley.

      SST 09950-50013 (09951-05010, 09952-05010, 09953-05010, 09953-05020, 09954-05021) 

      Fig 9: Removing Crankshaft Pulley
      G05288703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  24. REMOVE NO. 1 TIMING BELT COVER 
    1. Remove the 4 bolts and cover.
  25. REMOVE CRANKSHAFT POSITION SENSOR PLATE 
    1. Remove the crankshaft position sensor plate from the crankshaft.
      Fig 10: Locating Timing Belt Cover Bolts
      G05288704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  26. REMOVE TIMING GEAR COVER SPACER 
    1. Remove the cover spacer and gasket.
      Fig 11: Locating Timing Gear Cover Spacer
      G05288705Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  27. REMOVE TIMING BELT 
    1. If planning to reuse the belt, check the installation marks on the timing belt.
      1. Check that there are 3 installation marks on the belt by turning the crankshaft as shown in the illustration.

        If the installation marks have disappeared, place new installation marks on the belt before removing each part.

        Fig 12: Identifying Installation Marks On Belt
        G05288706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Set the No. 1 cylinder to approximately 50° BTDC/compression.
      1. Using the crankshaft pulley bolt, turn the crankshaft to align the timing marks of the crankshaft timing pulley and oil pump body.
        Fig 13: Turning Crankshaft Pulley
        G05288707Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Check that the timing marks of the camshaft timing pulleys and timing belt plates are aligned.

        If not, turn the crankshaft 1 revolution (360°).

        Fig 14: Aligning Timing Marks Of Camshaft Timing Pulleys And Timing Belt Plates
        G05288708Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Using the crankshaft pulley bolt, turn the crankshaft counterclockwise by approximately 45°.
        NOTE: With timing belt disengaged:
        The crankshaft pulley must be at the correct angle to avoid damage in later steps. If the crankshaft pulley is at the wrong angle and then the camshaft timing pulley and the camshaft are removed, the piston head and valve head may come in contact and be damaged.
        Fig 15: Identifying Timing Mark
        G05288709Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Alternately loosen the 2 bolts. Then remove the 2 bolts, belt tensioner and dust boot.
    4. Using SST, loosen the tension between the camshaft timing pulley (RH bank) and crankshaft timing pulley by slightly turning the camshaft timing pulley (RH bank) counterclockwise.
      Fig 16: Loosening Tension Between Camshaft Timing Pulley And Crankshaft Timing Pulley
      G05288710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      SST 09960-10010 (09962-01000, 09963-00350) 

    5. Disconnect the belt from the No. 1 timing belt idler, and remove the belt.
  28. REMOVE NO. 1 TIMING BELT IDLER SUB-ASSEMBLY (See  DISASSEMBLY   ) 
  29. REMOVE NO. 2 TIMING BELT IDLER SUB-ASSEMBLY (See  DISASSEMBLY   ) 
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