Engine Unit: Removal

2004 Lexus IS 300 Base, StandardSECTION Removal
  1. REMOVE ENGINE UNDER COVER 
  2. DRAIN ENGINE COOLANT 
  3. DRAIN ENGINE OIL 
  4. REMOVE ENGINE COVER 

    Remove the 4 nuts and engine cover.

  5. REMOVE AIR CLEANER INLET 
  6. DISCONNECT BRAKE BOOSTER VACUUM HOSE 
  7. DISCONNECT RADIATOR UPPER AND LOWER HOSES FROM ENGINE 
  8. DISCONNECT ACCELERATOR CABLE FROM ENGINE 
  9. REMOVE INTAKE AIR RESONATOR 
    1. Disconnect the MAF meter connector.
    2. Disconnect the engine wire clamp from the air cleaner case.
    3. Disconnect the PCV hose from the No. 2 cylinder head cover.
    4. Loosen the 2 hose clamp bolts, remove the intake air resonator from the throttle body.
      Fig 1: Removing Intake Air Resonator
      G00889368Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. M/T: REMOVE DRIVE BELT TENSIONER ABSORBER 

    Remove the 2 nuts and absorber.

  11. REMOVE DRIVE BELT (See  CHARGING  ) 
  12. REMOVE FRONT SUSPENSION MEMBER BRACE 

    Remove the 8 bolts and brace.

    Fig 2: Removing Front Suspension Member Brace
    G00889369Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. M/T: REMOVE TRANSMISSION SHIFT LEVER 
  14. DISCONNECT WIRES, CABLE, STRAP, CONNECTORS, HOSES AND CLAMPS 
    1. Disconnect the ground wire from the floor.
      Fig 3: Disconnecting Ground Wire From Floor
      G00889370Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the starter wire from the terminal and manifold stay.
    3. Disconnect the fuel inlet hose from the fuel pipe support.
    4. Disconnect the ground strap from the dash panel.
      Fig 4: Disconnecting Ground Strap From Dash Panel
      G00889371Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Disconnect the heater hose from the heater pipe.
    6. Disconnect the heater hose from the water bypass pipe.
    7. Disconnect the EVAP hose from the pipe (from charcoal canister).
    8. Disconnect the heater oxygen sensor (bank 1 sensor 1) connector.
    9. Disconnect the heater oxygen sensor (bank 1 sensor 2) connector.
    10. Disconnect the generator wire.
    11. Disconnect the engine wire clamp from the wire clip of generator.
      Fig 5: Disconnecting Engine Wire Clamp From Wire Clip
      G00889372Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. Disconnect the ground cable from the bracket on the cylinder block.
    13. Disconnect the igniter connector.
    14. Disconnect the 2 engine wire clamps from the clamp brackets.
      Fig 6: Disconnecting Engine Wire Clamps
      G00889373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. DISCONNECT ENGINE WIRE FROM ECM BOX 
    1. Remove the ECM hood and ECM cover.
    2. Disconnect the 3 ECM connectors.
    3. Disconnect the 4 wire harness connectors.
    4. Disconnect the 2 junction connectors.
    5. Disconnect the grommet and engine wire from the ECM box.
    Fig 7: Disconnecting Engine Wire From ECM Box
    G00889374Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. DISCONNECT PS PUMP AND A/C COMPRESSOR WITHOUT DISCONNECTING HOSES 
    1. Disconnect the PS air hose from the No. 4 timing belt cover.
    2. Disconnect the PS air hose from the air intake chamber
    3. Remove the 2 bolts and pump rear stay.
      Fig 8: Removing Pump Rear Stay Bolts
      G00889375Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 3 bolts and plate washer, and disconnect the vane pump assembly from the engine.
      Fig 9: Disconnecting Vane Pump Assembly
      G00889376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Loosen the nut.
    6. Using a torx socket (E10), remove the stud bolt and nut.
    7. Disconnect the PPS solenoid valve connector.
    8. Disconnect the A/C compressor connector.
    9. Remove the 2 bolts, and disconnect the compressor from the engine.
      Fig 10: Disconnecting Compressor
      G00889377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Put aside the vane pump and compressor, and suspend it securely.

  17. M/T: DISCONNECT CLUTCH RELEASE CYLINDER FROM TRANSMISSION 
  18. REMOVE PROPELLER SHAFT (See  REMOVAL  ) 
  19. A/T: REMOVE TRANSMISSION CONTROL ROD 

    Remove the 2 nuts and control rod.

    Fig 11: Removing Transmission Control Rod (A/T)
    G00889378Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. REMOVE FRONT AND CENTER EXHAUST PIPES 
  21. DISCONNECT SLIDING YOKE 
    1. Check the steering wheel at the straight-ahead position, and place matchmarks on the sliding yoke and intermediate shaft.
      Fig 12: Placing Matchmarks On Sliding Yoke
      G00889379Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt, and disconnect the sliding yoke from the steering intermediate shaft.
    3. Disconnect the PS pressure switch connector and wire clamp.
  22. REMOVE STABILIZER BAR 
    1. Remove the 2 nuts from the stabilizer bar links.
    2. Remove the 4 bolts, 2 stabilizer bar brackets and 2 bushings.
      Fig 13: Removing Stabilizer Bar
      G00889380Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  23. DISCONNECT SHOCK ABSORBER 

    Remove the bolt and nut, and disconnect the shock absorber from the shock absorber bracket.

    Fig 14: Disconnecting Shock Absorber
    G00889381Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  24. DISCONNECT LOWER ARM 
    1. Remove the nut, and disconnect the height level sensor from the lower arm.
    2. Remove the 2 bolts, and disconnect the lower arm from the steering knuckle.
  25. SET ENGINE JACK 
    NOTE: Using chain, hold the engine tightly.
RENDER: 1.0x

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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.