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Home >> Lexus >> 2003 >> RX 300 AWD >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Timing Belt Replacement - 3.0L V6 >> Removal & Installation >> Timing Belt >> Installation (RX 300)

Installation (RX 300)

  1. Install No. 1 and No. 2 idler pulleys (if removed). On No. 1 idler pulley bolt, coat threads with Loctite 242 or equivalent. Install and tighten bolts to specification. See TORQUE SPECIFICATIONS . Ensure idler pulleys are clean and rotate smoothly.
  2. Temporarily install crankshaft pulley bolt in crankshaft. If necessary, use crankshaft pulley bolt to rotate crankshaft clockwise until timing mark on crankshaft sprocket aligns with timing mark on oil pump body. See Figure.
  3. Using spanner wrench, rotate each camshaft sprocket so timing mark on camshaft sprocket aligns with timing mark on No. 3 timing belt cover. See Figure.
    4. NOTE: Engine should be cold when installing timing belt.
  4. Install timing belt on crankshaft sprocket, water pump pulley, left camshaft sprocket (front of vehicle side), No. 2 idler pulley, right camshaft sprocket (firewall side), and then on No. 1 idler pulley. If reusing old belt, ensure belt installation marks align with camshaft and crankshaft sprocket marks. Ensure front (or rotation direction mark) points in correct direction.
  5. Using press, SLOWLY apply about 200-2200 lbs. of pressure on push rod of timing belt tension until rod is retracted and holes in rod and housing are aligned. See Figure. Align holes in housing and push rod. Install hexagon wrench through housing and push rod hole to secure push rod. Release press and install dust boot on timing belt tensioner.
  6. Install timing belt tensioner. Install and alternately tighten bolts to specification. See TORQUE SPECIFICATIONS .
  7. Remove hexagon wrench from timing belt tensioner. Slowly rotate crankshaft clockwise 2 revolutions until timing mark on crankshaft sprocket aligns with timing mark on oil pump body.
  8. Ensure timing mark on each camshaft sprocket is aligned with timing mark on No. 3 timing belt cover. See Figure. If all timing marks are not aligned, remove timing belt and reinstall. Remove crankshaft pulley bolt.
  9. Install timing belt guide with cupped side facing outward. Install transverse engine mounting bracket on front of cylinder block. Install and tighten bolts to specification. See TORQUE SPECIFICATIONS .
  10. Using new gaskets, install No. 1 and No. 2 timing belt covers. Ensure there are no gaps in gasket. Cut off excess gasket. Install and tighten bolts to specification.
  11. Align crankshaft key with key groove of crankshaft pulley. Install crankshaft pulley. Install and tighten crankshaft pulley bolt to specification.
  12. Install generator bracket. Connect engine ground strap. Install engine mounting bracket No. 2 (right side) and engine moving control rod. Install cruise control actuator (if equipped).
  13. To install remaining components, reverse removal procedure. Tighten fasteners to specification. See TORQUE SPECIFICATIONS . Adjust drive belts to proper tension.
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