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Home >> Chevrolet >> 2015 >> Camaro LS, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Mechanical - 6.2L (L99 LS3 LSA) Or 7.0L (LS7) - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Timing Chain and Sprocket Installation (LS3, L99, or LSA)

Timing Chain and Sprocket Installation (LS3, L99, or LSA)

WARNING: This page is about a different variant/trim than selected.

Special Tools

For equivalent regional tools, refer to Special Tools

    Fig 1: View Of Crankshaft Key & Keyway
    GM156149Courtesy of GENERAL MOTORS COMPANY
  1. Install the key into the crankshaft keyway, if previously removed.
    2. Fig 2: View Of Installed Crankshaft Key
    GM1272887Courtesy of GENERAL MOTORS COMPANY
  2. Tap the key (122) into the keyway until both ends of the key bottom onto the crankshaft.
    3. Fig 3: View Of Crankshaft Sprocket
    GM1658182Courtesy of GENERAL MOTORS COMPANY
  3. Install the crankshaft sprocket (207) onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.
    4. Fig 4: View Of Crankshaft Sprocket & Installer
    GM1658237Courtesy of GENERAL MOTORS COMPANY
  4. Use the J 41478  installer (1) and the J 41665  installer (2) in order to install the crankshaft sprocket.

    Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.

  5. Rotate the crankshaft sprocket until the alignment mark is in the 12 o'clock position.
    6. Fig 5: Timing Belt Tensioner Retaining Pin
    GM1658249Courtesy of GENERAL MOTORS COMPANY
  6. Compress the timing chain tensioner guide and install the EN 46330  pin.
    7. Fig 6: View Of Timing Chain Tensioner
    GM1658251Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  7. Install the timing chain tensioner (232) and bolts (231). Tighten the timing chain tensioner bolts to 30 N.m (22 lb ft).
    8. Fig 7: View Of Camshaft Sprocket, Timing Chain & Bolt
    GM1759805Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Do not use the camshaft sprocket bolt again. Install a NEW bolt during assembly.
    • The sprocket teeth and timing chain must mesh.
    • The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly.
  8. Install the camshaft sprocket (205), timing chain (208), and NEW bolt (206).
    9. Fig 8: Identifying Camshaft & Crankshaft Marks
    GM1658268Courtesy of GENERAL MOTORS COMPANY
  9. Inspect the sprockets for proper alignment. The mark on the camshaft sprocket (1) should be located in the 6 o'clock position and the mark on the crankshaft sprocket (2) should be located in the 12 o'clock position.
    10. Fig 9: Locating Tensioner Pin
    GM1658271Courtesy of GENERAL MOTORS COMPANY
  10. Remove the EN 46330  pin.
    11. NOTE:

    Do not apply threadlock to the flex plate bolts at this time.

  11. Temporarily install the automatic transmission flex plate and bolts. Refer to Automatic Transmission Flex Plate Installation .
    12. Fig 10: Flywheel Holder
    GM1658136Courtesy of GENERAL MOTORS COMPANY
  12. Install the J 42386-A  tool (1) and bolts. Use 1 M10-1.5 x 120 mm bolt and 1 M10-1.5 x 45 mm bolt for proper tool operation. Tighten the J 42386-A  tool bolts to 50 N.m (37 lb ft).
    13. Fig 11: Identifying Camshaft Sprocket Bolt Tightening Sequence
    GM1658274Courtesy of GENERAL MOTORS COMPANY
  13. Tighten the camshaft sprocket bolt.
    1. Tighten the camshaft sprocket bolt a first pass to 75 N.m (55 lb ft).
    2. Tighten the camshaft sprocket bolt a final pass an additional 50 degrees using the J 45059  meter.
  14. Remove the J 42386-A  tool and bolts.
  15. Remove the automatic transmission flex plate and bolt. Refer to Automatic Transmission Flex Plate Removal .
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