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Toyota Supra JZA80

Timing belt installation

  1. Install crankshaft timing pulley
    1. Align the pulley set key with the key groove of the pulley.
    2. Slide on the timing pulley facing the flange side inward.
      Do not scratch the sensor part of the crankshaft timing pulley.
    3. Install the timing belt plate with the bolt.
      Torque: 7.8 N⋅m (80 kgf⋅cm, 69 in.⋅lbf)
  2. Install idler pulley
    1. Apply adhesive to 2 or 3 threads of the pivot bolt.
      Adhesive:
      Part No. 08833-00080, THREE BOND 1344, LOCTITE 242 or equivalent
    2. Using a 10 mm hexagon wrench, install the plate washer and pulley with the pivot bolt.
      Torque: 35 N·m (350 kgf·cm, 26 ft·lbf)
    3. Check that the pulley bracket moves smoothly.
  3. Temporarily install timing belt
    The engine should be cold.
    1. Using the crankshaft pulley bolt, turn the crankshaft, and align the timing marks on the crankshaft timing pulley and on the oil pump body.
    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.
      (When re–using timing belt):
      Align the match marks of the crankshaft timing pulley and timing belt, and install the belt with the arrow pointing in the direction of engine revolution.
  4. Install timing belt guide
    Install the guide, facing the cup side outward.
  5. Install No.1 timing belt cover
  6. Install crankshaft pulley
    1. Align the pulley set key with the key groove of the pulley, and slide on the pulley.
    2. Using SST, install the bolt.
      SST 09213-70010, 09330-00021
      Torque: 324 N⋅m (3,300 kgf⋅cm, 239 ft⋅lbf)
  7. A/T:
    Connect oil cooler tubes
  8. Install camshaft timing pulleys
    1. Align the camshaft knock pin with the groove of the pulley, and slide on the timing pulley.
    2. Temporarily install the timing pulley bolt.
    3. Using SST, tighten the pulley bolt.
      SST 09960-10010 (09962-01000, 09963-01000)
      Torque: 79 N⋅m (810 kgf⋅cm, 59 ft⋅lbf)
  9. Set No.1 cylinder to TDC/compression
    1. Turn the crankshaft pulley, and align its groove with timing mark ”O” of the No.1 timing belt cover.
      Always turn the crankshaft clockwise.
    2. Using SST, align the timing marks of the camshaft timing pulleys and No.4 timing belt cover.
      SST 09960-10010 (09962-01000, 09963-01000)
  10. Install timing belt
    (When re–using timing belt):
    Align the matchmarks of the timing belt and camshaft timing pulleys.
    1. Remove any oil or water on the camshaft timing pulley, and keep it clean.
    2. Install the timing belt, checking the tension between the crankshaft timing pulley and exhaust camshaft timing pulley.
  11. Set timing belt tensioner
    1. Using a press, slowly press in the push rod using 981 - 9,807 N (100 - 1,000 kgf, 220 - 2,205 lbf) of force.
    2. Align the holes of the push rod and housing, pass a 1.5 mm hexagon wrench through the holes to keep the push rod retracted.
    3. Release the press.
    4. Install the dust boot onto the tensioner.
  12. Install timing belt tensioner
    1. Temporarily install the tensioner with the 2 bolts.
    2. Alternately tighten the 2 bolts.
      Torque: 26 N⋅m (270 kgf⋅cm, 20 ft⋅lbf)
    3. Remove the 1.5 mm hexagon wrench from the tensioner.
  13. Check valve timing
    1. Slowly turn the crankshaft pulley 2 revolutions from TDC to TDC.
      Always turn the crankshaft clockwise.
    2. Check that each pulley aligns with the timing marks as shown in the illustration.
      If the marks do not align, remove the timing belt and reinstall it.
  14. Install drive belt tensioner Install the tensioner with the 3 bolts.
    Torque: 21 N⋅m (210 kgf⋅cm, 15 ft⋅lbf)
    Be careful not to drop the bolts inside the timing belt cover.
  15. Install No.2 timing belt cover
  16. Install No.3 timing belt cover
  17. Install PS pump
    1. Temporarily install the pump pulley with the nut.
    2. Using SST, tighten the pulley nut.
      SST 09960-10010 (09962-01000, 09963-01000)
      Torque: 43 N·m (440 kgf·cm, 32 ft·lbf)
  18. Install water pump pulley, fan, fluid coupling assembly and drive belt (See page CO-11)
  19. M/T:
    Install drive belt tensioner damper

    Torque: 20 N⋅m (200 kgf⋅cm, 14 ft⋅lbf)
  20. Install radiator assembly (See page CO-28 )
  21. Road test
    Check for abnormal noise, shock, slippage, correct shift points and smooth operation.
This guide is based on the book edition Toyota (RM502U, 1997)

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