Timing Belt: Installation

2004 Lexus IS 300 Base, AutomaticSECTION Installation
  1. INSTALL CRANKSHAFT TIMING PULLEY 
    1. Align the pulley set key with the key groove of the pulley.
      Fig 1: Aligning Pulley Set Key With Key Groove Of Pulley
      G00889229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Slide on the timing pulley facing the flange side inward.
      NOTE: Do not scratch the sensor part of the crankshaft timing pulley.
    3. Install the timing belt plate with the bolt.
      1. Torque: 8.0 N.m (80 kgf.cm, 71 in..lbf) 
      Fig 2: Installing Timing Belt Plate With Bolt
      G00889230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL IDLER PULLEY 
    1. Apply adhesive to 2 or 3 threads of the pivot bolt.
      1. Adhesive: Part No. 08833-00080, THREE BOND 1344, LOCTITE 242 or equivalent 
        Fig 3: Applying Adhesive To Threads Of Pivot Bolt
        G00889231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a 10 mm hexagon wrench, install the plate washer and pulley with the pivot bolt.
      1. Torque: 35 N.m (350 kgf.cm, 26 ft.lbf) 
    3. Check that the pulley bracket moves smoothly.
  3. TEMPORARILY INSTALL TIMING BELT 
    NOTE: The engine should be cold.
    1. Use the crankshaft pulley bolt to turn the crankshaft, and align the dot mark on the crankshaft timing pulley and the timing mark on the oil pump body.
      Fig 4: Aligning Dot Mark On Crankshaft Timing Pulley And Timing Mark
      G00889232Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove any oil or water on the crankshaft timing pulley and idler pulley, and keep them clean.
    3. Install the timing belt on the crankshaft timing pulley and idler pulley.

      HINT:

      When re-using timing belt:

      Align the matchmarks of the crankshaft timing pulley and timing belt, and install the belt with the arrow pointing in the direction of engine revolution.

    Fig 5: Installing Belt With Arrow Pointing In Direction Of Engine Revolution
    G00889233Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL TIMING BELT GUIDE 

    Install the guide, facing the cup side outward.

  5. INSTALL NO. 1 TIMING BELT COVER 
    1. Install the gasket to the timing belt cover.
    2. Install the timing belt cover with the 5 bolts.
      1. Torque: 8.0 N.m (80 kgf.cm, 71 in..lbf) 
    Fig 6: Installing Timing Belt Guide
    G00889234Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSTALL CRANKSHAFT PULLEY 
    1. Align the pulley set key with the key groove of the pulley, and slide on the pulley.
    2. Check that the sub timing mark (60° mark BTDC) of the crankshaft pulley is aligned with the timing mark "0" of the No. 1 timing belt cover.

      HINT:

      At this time, the crankshaft pulley set key groove and the timing mark (TDC mark) of the crankshaft pulley are as shown in Fig 7 .

      Fig 7: Installing Crankshaft Pulley
      G00889235Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Temporarily install the pulley bolt.
  7. INSTALL VVT-i (INTAKE CAMSHAFT TIMING) PULLEY 
    1. Align the camshaft knock pin with the VVT-i pulley, and push the VVT-i pulley by hand until you feel it touch the bottom.
      Fig 8: Aligning Camshaft Knock Pin With VVT-I Pulley
      G00889236Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check that the outer circumference of the VVT-i pulley easily rotates through 30°.
      Fig 9: Checking Rotation Of Outer Circumference Of VVT-I Pulley
      G00889237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Holding the hexagon portion of the camshaft with a wrench.
    4. Using a 10 mm hexagon wrench, and the set bolt.
      1. Torque: 81 N.m (810 kgf.cm, 60 ft.lbf) 
    5. Using a 14 mm hexagon wrench, install the straight screw plug with the seal washer to the set bolt.
      1. Torque: 15 N.m (150 kgf.cm, 11 ft.lbf) 
        Fig 10: Installing Straight Screw Plug With Seal Washer To Set Bolt
        G00889238Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Align the dot mark on the camshaft timing pulley with the timing mark of the No. 4 timing belt cover.
    7. Remove the wrench.
  8. CONNECT NO. 1 OIL PIPE 
    1. Install the union bolt to the oil control valve filter.
      NOTE: In case of touching the filter, avoid holding the mesh part and holding the frame part.
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.