2004 Lexus LX 470FACTORY OEM SERVICE PROCEDURE

Cylinder Block: Disassembly

  1. INSTALL ENGINE TO ENGINE STAND 
  2. REMOVE TIMING BELT AND PULLEYS (See  REMOVAL  ) 
  3. REMOVE CYLINDER HEAD (See  REMOVAL  ) 
  4. REMOVE WATER BYPASS PIPE 
    1. Disconnect the wire clamp (for knock sensor 1,2) from the bracket of the water bypass pipe.
    2. Remove the bolt.
    3. Pull out the water bypass pipe from the water pump.
    4. Remove the O-ring from the water bypass pipe.
    5. Fig 1: Removing O-Ring From Water Bypass Pipe
      G00914066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE STARTER (See  REMOVAL & INSTALLATION  ) 
  6. REMOVE KNOCK SENSORS (See  INSPECTION  ) 
  7. DISCONNECT ENGINE WIRE FROM LH SIDE OF CYLINDER BLOCK 
    1. Remove the 2 bolts and the engine wire cover from the LH side of the cylinder block.
    2. Remove the bolt, disconnect the bracket on the engine wire from the cylinder block.
    Fig 2: Removing Bolts & Engine Wire Cover From LH Side Of Cylinder Block
    G00914067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. DISCONNECT ENGINE WIRE FROM RH SIDE OF CYLINDER BLOCK 

    Remove the 2 bolts, and disconnect the 2 brackets on the engine wire from the cylinder block.

  9. Fig 3: Removing Bolts From RH Side Of Cylinder Block
    G00914068Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE OIL COOLER PIPE BRACKET FOR A/T 

    Remove the bolt and bracket.

  11. REMOVE ENGINE MOUNTING BRACKETS 

    Remove the 4 bolts and the mounting bracket. Remove the 2 mounting brackets

  12. REMOVE WATER PUMP (See  REMOVAL  ) 
  13. REMOVE NO. 2 OIL PAN (See  REMOVAL  ) 
  14. REMOVE OIL PAN BAFFLE PLATE 
  15. REMOVE NO. 1 OIL PAN (See  REMOVAL  ) 
  16. REMOVE OIL STRAINER 
  17. REMOVE OIL PUMP (See  REMOVAL  ) 
  18. REMOVE ENGINE COOLANT DRAIN UNIONS 

    Remove the 2 drain unions.

  19. REMOVE REAR OIL SEAL RETAINER 
    1. Remove the 7 bolts.
    2. Using a screwdriver, ply off the oil seal retainer and the main bearing cap with a screwdriver.
    3. Remove the O-ring.
    Fig 4: Removing Rear Oil Seal Retainer & Bolt
    G00914069Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. CHECK CONNECTING ROD THRUST CLEARANCE 

    Using a dial indicator, measure the thrust clearance while moving the connecting rod back an a forth.

    1. Standard thrust clearance: 0.160 - 0.290 mm (0.0063 - 0.0138 in.) 
    2. Maximum thrust clearance: 0.35 mm (0.0138 in.) 

    If the thrust clearance is greater than the maximum, replace the connecting rod assembly(s). If necessary, replace the crankshaft.

    1. Connecting rod thickness: 22.880 - 22.920 mm (0.9008 - 0.9024 in.) 
    Fig 5: Measuring Thrust Clearance Using Dial Indicator
    G00914070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  21. REMOVE CONNECTING ROD CAPS AND CHECK OIL CLEARANCE 
    1. Check the matchmarks on the connecting rod and cap to ensure correct reassembly.
    2. Remove the 2 connecting rod cap bolts.
      Fig 6: Removing Connecting Rod Cap Bolts
      G00914071Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using the 2 removed connecting rod cap bolts, remove the connecting rod cap and the lower bearing by wiggling the connecting rod cap right and left.
      Fig 7: Removing Connecting Rod Cap
      G00914072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      Keep the lower bearing inserted with the connecting rod cap.

    4. Clean the crank pin and the bearing.
    5. Check the crank pin and the bearing for pitting and scratches.

      If the crank pin or the bearing is damaged, replace the bearings. If necessary, replace the crankshaft.

    6. Lay a strip of plastigage across the crank pin.
      Fig 8: Laying Strip Of Plastigage Across Crank Pin
      G00914073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Install the connecting rod cap with the 2 bolts. (See REASSEMBLY )
      NOTE: Do not turn the crankshaft. 
    8. Fig 9: Installing Connecting Rod Cap With Bolts
      G00914074Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Remove the 2 bolts, the connecting rod cap and the lower bearing. (See procedure ( b) and ( c) above)
    10. Measure the plastigage at its widest point.
      1. Standard oil clearance: 0.027 - 0.053 mm (0.0011 - 0.0021 in.) 
      2. Maximum oil clearance: 0.065 mm (0.0026 in.) 

      If the oil clearance is greater than the maximum, replace the bearings. If necessary, replace the crankshaft.

      Fig 10: Measuring Plastigage At Widest Point
      G00914075Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      If using a standard bearing, replace it with the one having the same number. If the number of the bearing cannot be determined, sum up the numbers imprinted on the connecting rod cap and the crankshaft, then select the one with the same number as the total. There are 6 sizes of standard bearings, marked "2", "3", "4", "5", "6" and "7".

      Fig 11: Standard Bearing Replacement
      G00914077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.