Toyota Sienna 2000-06

Timing Belt, Cover, Sprockets, & Seal

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Removal & Installation



3.0L & 3.3L Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the outer front cowl top panel assembly by performing the following procedure:
    1. Remove the wiper arm/blade assemblies head caps, nuts and assemblies.
    2.  
    3. Remove the head-to-cowl seal and the cowl panel hole cover.
    4.  
    5. Disconnect the windshield washer clip and hose.
    6.  
    7. Remove both (right and left) cowl top ventilator louvers.
    8.  
    9. Disconnect the electrical connector from the windshield wiper motor.
    10.  
    11. Remove the outer front cowl top panel assembly-to-cowl bolts and the panel.
    12.  

  4.  
  5. Raise and safely support the vehicle.
  6.  
  7. Remove the right front wheel assembly and apron seal.
  8.  
  9. Remove the alternator by performing the following procedure:
    1. Loosen the pivot bolt, adjusting lockbolt and adjusting bolt, then, remove the drive belt.
    2.  
    3. Disconnect the alternator-s electrical connector.
    4.  
    5. Remove the nut and the alternator wire.
    6.  
    7. Disconnect the wiring harness from the clip.
    8.  
    9. Remove the alternator-to-bracket pivot bolt, the washer, adjusting lockbolt and alternator.
    10.  

  10.  
  11. Loosen the power steering pump-s mount and adjusting bolt, then, remove the drive belt.
  12.  
  13. Disconnect the hose from the engine coolant reservoir.
  14.  
  15. Disconnect the Diagnostic Link Connector 1 (DLC1) from the No. 2 right side engine mounting bracket.
  16.  
  17. Remove the right side engine mounting stay, the engine moving control rod and the No. 2 right side engine mounting bracket.
  18.  
  19. Loosen the alternator-s pivot bolt, the nut and the No. 2 alternator bracket.
  20.  
  21. Using the Crankshaft Pulley Holding tool 09213-54015, Bolt tool 91651-60855 and Companion Flange Holding tool 09330-00021, or equivalent, remove the crankshaft pulley bolt.
  22.  
  23. Using a Puller -C- Set 09950-50011 (Hanger 150 tool 09951-05010, Slide Arm tool 09952-5010, Center Bolt 100 tool 09953-05010, Center Bolt 150 tool 09953-05020 and 2 No. 2 Claw tools 09954-05020), pull the crankshaft pulley from the crankshaft.
  24.  
  25. Remove the lower (No. 1) timing belt cover. Remove the timing belt guide from the crankshaft.
  26.  
  27. Remove the engine wire protector clamps from the upper (No. 2) timing belt cover and remove the upper (No. 2) timing belt cover.
  28.  
  29. Remove the right side engine mounting brace
  30.  


NOTE
If reusing the timing belt, be sure that you can still read the installation marks. If not, place new installation marks on the timing belt to match the timing marks of the camshaft timing pulleys.

  1. Temporarily install the crankshaft pulley bolt.
  2.  
  3. Set the No. 1 cylinder to Top Dead Center (TDC) of the compression stroke, as follows:
    1. Rotate the crankshaft (CLOCKWISE) to align the timing marks: dimple on the crankshaft timing sprocket with the notch on the oil pump body.
    2.  
    3. Check that the timing marks on the camshaft sprockets and the rear timing belt cover are aligned; if not, rotate the crankshaft 360 degrees (1 revolution) and align the marks.
    4.  

  4.  
  5. Remove the timing belt tensioner and the timing belt.
  6.  


    Click image to see an enlarged view

    Fig. Exploded view of the timing belt assembly



    Click image to see an enlarged view

    Fig. Removing/installing the crankshaft pulley



    Click image to see an enlarged view

    Fig. View of the timing mark locations



    Click image to see an enlarged view

    Fig. Timing belt alignment



    Click image to see an enlarged view

    Fig. Timing belt tensioner installation preparation


To install:

  1. Inspect the timing belt tensioner by performing the following procedures:
    1. Inspect the seal for leakage; if leakage is suspected, replace the tensioner.
    2.  
    3. Using both hands to hold the tensioner facing upward, strongly press the pushrod against a solid surface. If the pushrod moves, replace the tensioner.
    4.  

  2.  


WARNING
Never hold the tensioner with the pushrod facing downward.

  1. Measure the pushrod protrusion from the housing end, it should be 0.394-0.425 in. (10.0-10.8mm); if the protrusion is not as specified, replace the tensioner.
  2.  

  1. Set the No. 1 cylinder to Top Dead Center (TDC) of the compression stroke, as follows:
    1. Rotate the crankshaft (CLOCKWISE) to align the timing marks: dimple on the crankshaft timing sprocket with the notch on the oil pump body.
    2.  
    3. Check that the timing marks on the camshaft sprockets and the rear timing belt cover are aligned; if not, rotate the crankshaft 1 revolution (360 degrees) and align the marks.
    4.  



    Click image to see an enlarged view

    Fig. If the timing belt is re-used, check that the 3 original installation marks are visible on the belt as shown

  2.  
  3. Install the timing belt in the following order:
    1. Crankshaft timing sprocket
    2.  
    3. Water pump pulley
    4.  
    5. Left camshaft timing sprocket
    6.  
    7. No. 2 idler pulley
    8.  
    9. Right camshaft sprocket
    10.  
    11. No. 1 idler pulley
    12.  



    Click image to see an enlarged view

    Fig. Turn the crankshaft counterclockwise by 60 degrees



    Click image to see an enlarged view

    Fig. Remove the belt from the pulleys in this order

  4.  
  5. Using a vertical press, slowly press the pushrod into the housing using 200-2205 lbs. (981-9807 N) until the holes align, then, install a 1.27mm Allen® wrench to secure the pushrod and release the press. Install the dust boot on the tensioner housing.
  6.  
  7. Install the timing belt tensioner and torque the bolts to 20 ft. lbs. (27 Nm).
  8.  
  9. Remove the Allen® wrench from the tensioner housing.
  10.  
  11. Slowly, rotate the crankshaft (CLOCKWISE) 2 complete revolutions and realign the timing marks. If the timing marks do not align, remove the timing belt and reinstall it.
  12.  
  13. Remove the crankshaft pulley bolt.
  14.  
  15. Install the right side engine mounting bracket and torque the bolts to 21 ft. lbs. (28 Nm).
  16.  
  17. Clean and install the upper (No. 2) timing belt cover.
  18.  


    Click image to see an enlarged view

    Fig. Turn the camshaft pulleys back into alignment so the marks align with the notches on the inner cover



    Click image to see an enlarged view

    Fig. Install the belt in this order



    Click image to see an enlarged view

    Fig. Set the tensioner in a press and collapse the plunger. Do not apply more that 2,205 lbs (9.8 kN) of force. Insert a suitable metal rod through the holes to hold the plunger in position



    Click image to see an enlarged view

    Fig. Install the timing belt guide with the cupped side facing front



NOTE
If the gasket material on the timing belt covers is cracked, peeling or etc., replace it.

  1. Install the timing belt guide on the crankshaft with the cup side facing outward.
  2.  
  3. Clean and install the lower (No. 1) timing belt cover.
  4.  


NOTE
If the gasket material on the timing belt covers is cracked, peeling or etc., replace it.

  1. Install the crankshaft pulley.
  2.  
  3. Using the Crankshaft Pulley Holding tool 09213-54015, Bolt tool 91651-60855 and Companion Flange Holding tool 09330-00021, or equivalent, install the crankshaft pulley bolt and torque the bolt to 159 ft. lbs. (215 Nm).
  4.  
  5. To complete the installation, reverse the removal procedures.
  6.  
  7. Connect the negative battery cable.
  8.  
  9. Start the engine and check for leaks.
  10.  

 
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