2003 Lexus GS 430FACTORY OEM SERVICE PROCEDURE

Camshaft Position Sensor: Replacement

  1. REMOVE V-BANK COVER
  2. DRAIN ENGINE COOLANT
  3. DISCONNECT UPPER RADIATOR HOSE FROM FRONT WATER BYPASS JOINT
  4. REMOVE LH NO. 3 TIMING BELT COVER (See REMOVAL , TIMING BELT )
  5. REMOVE CAMSHAFT POSITION SENSOR

    Remove the bolt, stud bolt and camshaft position sensor.

  6. REINSTALL NEW CAMSHAFT POSITION SENSOR
    Fig 1: Installing Camshaft Position Sensor
    G00855884Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002

    Install a new camshaft position sensor with the bolt and stud bolt.

    Torque: 7.5 N-m (80 kgf-cm, 66 in.-lbf)Β 

  7. REINSTALL LH No. 3 TIMING BELT COVER (See INSTALLATION , TIMING BELT )
  8. RECONNECT UPPER RADIATOR HOSE TO FRONT WATER BYPASS JOINT
  9. REFILL WITH ENGINE COOLANT (See COOLANT )
  10. START ENGINE AND CHECK FOR ENGINE COOLANT LEAKS
  11. REINSTALL V-BANK COVER
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When to See a Mechanic

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

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

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