Lexus GS, SC 1998-06

Timing Belt, Cover, Sprockets, & Seal

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Removal & Installation



2JZ-GE Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove all necessary components for access to the upper timing belt covers. Using a 5mm Allen wrench, remove the 9 bolts and lift off the two upper (No. 2 and No. 3) timing belt covers.
  4.  
  5. Rotate the crankshaft pulley clockwise so its groove is aligned with the0
  6.  
  7. Alternately loosen the 2 tensioner mounting bolts and remove them, the tensioner and the dust boot. Slide the timing belt off of the 2 camshaft sprockets. Its a good idea to matchmark the belt to the pulleys.
  8.  
  9. Ensuring the timing belt is securely supported, hold the crankshaft pulley with a spanner wrench and loosen the mounting bolt. Remove the bolt and the pulley.
  10.  
  11. Remove or disconnect the following:

    5 bolts, then lift off the lower No. 1 timing belt cover
     
    Timing belt guide
     
    Timing belt
     

  12.  


NOTE
If the timing belt is to be reused, draw a directional arrow on the timing belt in the direction of engine rotation (clockwise) and place matchmarks on the timing belt and crankshaft gear to match the drilled mark on the pulley.



Click image to see an enlarged view

Fig. Set the engine to TDC by aligning the marks before removing the lower timing cover-Lexus 3.0L (2JZ-GE) engine

To install:

  1. Install the timing belt on the crankshaft timing pulley and the idler pulleys.
  2.  


NOTE
If the old timing belt is being reinstalled, be sure the directional arrow is facing in the original direction and that the belt and crankshaft gear matchmarks are properly aligned.

  1. Install the timing belt guide. Install the lower (No. 1) timing cover and tighten the bolts.
  2.  
  3. Align the crankshaft pulley set key with the key groove on the pulley and slide the pulley on. Tighten the bolt to 239 ft. lbs. (324 Nm).
  4.  
  5. Set the No. 1 cylinder to TDC again. Turn the camshaft until the sprocket timing marks are aligned with the timing marks on the No. 4 belt cover.
  6.  
  7. Check that the marks on the belt matches with those on the sprockets, then slide it over the sprockets. If not, shift it on the crank pulley until it does.
  8.  
  9. Position a plate washer between the timing belt tensioner and the block, then press in the pushrod until the holes are aligned between it and the housing. Slide a 1.5mm Allen wrench through the hole to keep the pushrod set. Install the dust boot, then install the tensioner. Tighten the bolts to 20 ft. lbs. (26 Nm). Don't forget to pull out the Allen wrench.
  10.  
  11. Turn the crankshaft clockwise two complete revolutions and check that all marks are still in alignment. If they aren't, remove the timing belt and start over again.
  12.  
  13. Position new gaskets, then install the upper (No. 2 and No. 3) timing covers.
  14.  

3MZ-FE Engine
  1. Remove or disconnect the following:

    RH front fender apron seal
     
    A/C drive belt
     
    Engine stabilizing rod
     
    Engine mounting stay
     
    Alternator bracket
     
    Crankshaft pulley
     
    Upper and lower timing belt covers
     
    Engine mounting bracket (If necessary)
     

  2.  
  3. Remove the timing belt

    Set the No 1 cylinder to TDC/compression
     
    Temporarily install the crankshaft pulley bolt
     
    Turn the crankshaft clockwise, the align the timing mark on the crankshaft timing pulley with the mark on the oil pump body
     
    Verify that the timing marks on the camshaft timing pulleys align with the timing marks on the inside timing belt cover. If not, turn the crankshaft on revolution (360 degrees).
     


    Click image to see an enlarged view

    Fig. Aligning camshaft pulleys-3.3L (3MZ-FE) engine

    If reusing the timing belt make certain there are 3 location marks on the timing belt corresponding with the marks on the timing gears.
     


    Click image to see an enlarged view

    Fig. Marking the timing belt for reuse-3.3L (3MZ-FE) engine

    Set the No 1 cylinder to approximately 60 degrees BTDC/compression. Turn the crankshaft counterclockwise by approximately 60 degrees.
     



    Click image to see an enlarged view

    Fig. Aligning crankshaft pulley-3.3L (3MZ-FE) engine

  4.  


WARNING
If the timing belt is disengaged, having the crankshaft pulley set at the wrong angle can cause contact of the piston with the valves, causing damage to the valves. Always set the crankshaft pulley at the correct angle.



Remove timing belt tensioner
 


NOTE
Do NOT reinstall the timing belt tensioner with the plunger extended.

  1. Remove the timing belt in the following order.

    No 1 idler pulley
     
    RH camshaft timing pulley
     
    No. 2 idler pulley
     
    LH camshaft timing pulley
     
    Water pump pulley
     
    Crankshaft timing pulley
     

  2.  
  3. Inspect the timing belt
  4.  


    Click image to see an enlarged view

    Fig. Removal of timing belt from pulleys-3.3L (3MZ-FE) engine



NOTE
do not reuse the timing belt if there is evidence of fraying, oil contamination, cracking, tooth damage or wear, or belt distortion. If there is any doubt in the belt condition, replace the belt.

To install:

  1. After inspecting the pulleys for wear and checking for oil leaks install the timing belt using the following procedure.

    Temporarily install the crankshaft pulley bolt
     
    Make sure the crankshaft pulley is set at 60° BTDC
     
    Align the timing marks on the camshaft pulley with the respective marks on the inside timing cover.
     
    If reusing the old belt, align the marks previously made on the belt with the marks on the timing gears.
     
    Install the belt in the reverse order used when removing the belt
     

  2.  
  3. Install the timing belt tensioner using the following procedure
  4.  


NOTE
Keep the tensioner in an upright position



Slowly depress the push rod and align the hole with the hole in the housing
 
Insert a 1.5 mm hexagon wrench through the holes to maintain the setting position of the push rod.
 
Install the tensioner with the 2 bolts and torque to 20 ft. lbs (27 Nm).
 
Remove the hexagon wrench
 

  1. Slowly turn the crankshaft 2 revolutions clockwise.
  2.  
  3. Check to see that all timing marks are in alignment.
  4.  
  5. Remove the crankshaft bolt
  6.  
  7. Install the timing belt guide
  8.  
  9. Install all remaining components in the reverse order of removal.
  10.  

 
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