Question about 1998 Saturn SL

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Dont no how to set the timming and what it suppose to be

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Timing Chain and Sprockets

  1. Fig. 1: At 90 degrees past TDC, the crankshaft sprocket timing
    mark and keyway will align with the main bearing cap split line
    dont no how to set - 84193100.gif

    Fig. 2: Exploded view of the timing chain and sprocket
    assembly - SOHC engine

    Fig. 3: Insert the timing pin to ensure that the camshaft is at
    No. 1 TDC - SOHC engine

    Fig. 4: When the camshaft is at TDC, rotate the crankshaft
    counterclockwise 90 degrees to achieve TDC
    dont no how to set - 84193103.gi" alt="84193103.gif" class="h_mi" />

DOHC Engine

  1. Disconnect the negative battery cable.
  2. Remove the timing chain front cover.
    NOTE: During timing chain and sprocket removal, position the
    crankshaft 90 degrees past Top Dead Center (TDC) to make sure the pistons will
    not contact the valves upon assembly.

  3. Carefully rotate the crankshaft clockwise so the timing mark on the
    crankshaft sprocket and keyway align with the main bearing cap split line.
  4. Remove the bolts, then remove the timing guides and tensioner.
  5. Remove the camshaft sprocket bolts, using a 7?8 in. (21mm) wrench
    to hold the camshaft. Then remove the timing chain and camshaft sprocket. Remove
    the crankshaft sprocket, if necessary.
    To install:

  6. Inspect the chain for wear and damage. Check the inside diameter of the
    chain, it should be no more than 23.15 in. (588mm). Inspect the chain guides for
    wear or cracks and the timing sprockets for teeth or key wear. Replace
    components as necessary.
  7. Verify that the crankshaft is positioned 90 degrees clockwise past TDC. The
    crankshaft keyway should be at 3 o'clock aligned with the main bearing cap split
    line to prevent piston and valve damage.
  8. Install the camshaft sprockets, retaining bolts and washers. Make sure the
    letters FRT on the sprockets face forward, away from the cylinder block. Use the
    wrench flats provided on the camshafts to hold the shaft and tighten the bolts
    to 75 ft. lbs. (102 Nm).
  9. Bring the camshafts up to No. 1 TDC by rotating the camshafts and sprocket
    until the dowel pins are at 12 o'clock. Install a 1?6 in. drill bit
    into the hole in the sprocket about 9 o'clock.
  10. If removed, install the crankshaft sprocket, then rotate the crankshaft
    counterclockwise 90 degree up to No. 1 TDC (keyway and sprocket timing mark at
    12 o'clock, in alignment with the block timing mark).
  11. Position the timing chain under the crankshaft sprocket and over the
    camshaft sprockets so 2 silver link plates align with the reference marks on the
    camshaft sprockets and another 2 plates align with the downward tooth (at 6
    o'clock position) on the crankshaft sprocket. Excess chain slack should be
    located on the tensioner side of the cylinder block.
  12. Verify that the crankshaft reference mark aligns with the cylinder block
    mark at 12 o'clock and that the timing pins are installed in the holes at about
    the 9 o'clock position. Remove the timing pins from the camshaft sprockets.
  13. Install the timing chain fixed guide to the right of the block face toward
    the water pump. Tighten the bolts to 21 ft. lbs. (28 Nm) and verify the chain is
    snug against the guide.
  14. Install the pivoting chain guide and check for clearance between the block
    and head. Tighten the bolt to 19 ft. lbs. (26 Nm) and verify the guide pivots
  15. Install the 2 forward camshaft bearing caps and the upper timing chain
    guide, then tighten the retaining bolts to 124 inch lbs. (14 Nm).
  16. Retract the tensioner plunger and pin the ratchet lever using a 1?8 in. (3.18mm) No.
    31 drill bit inserted in the alignment hole at the lower front of the component.
    Install the tensioner and tighten the bolts to 14 ft. lbs. (19 Nm), then remove
    the drill bit.
  17. Make one final check to verify all components are properly timed, then
    remove all timing pins.
  18. Install the timing chain front cover.
  19. Connect the negative battery cable, start the engine and check for leaks.

    Fig. 5: Rotate the crankshaft clockwise until the timing mark
    on the crankshaft sprocket and keyway align with the main bearing cap spdont no how to set - 89563pb1.jpg />

    Fig. 6: Loosen the timing dont no how to set - 89563pb4.jpgner mounting bolt . . .

    Fig.dont no how to set - 89563pb7.jpgd remove the tensioner from the engine block

    Fig. 8: Retract the tensioner plunger and pin the ratchet lever
    with a 1
    in. (3.18mm) drill bit inserted in the alignment hole

    dont no how to set - 89563pb8.jpg />
    Fig. 9: Remove the mounting fasteners from both timing guides .
    . .

    Fig. 10: . . . and remove the timing guides from the engine

    ?8 in. (21mm) wrench
    to hold the camshaft

    Fig. 12: Remove the timing chain and camshaft sprockets

    Fig. 13: Insert the timing pins to verify that the camshafts
    are at TDC

    Fig. 14: Make sure that the silver linkdont no how to set - prev.gifand reference
    marks are all in alignment as shown

prev.gif next.gif

Posted on Oct 07, 2010


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