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Home >> Chevrolet >> 2011 >> Corvette ZR-1 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 6.2L Or 7.0L - Repair Instructions - On Vehicle (2 Of 2) >> Camshaft Timing Chain and Sprocket Replacement (RPO LS9, LS7, And LS3 W/Z52) >> Installation Procedure

Installation Procedure

    Fig 1: Crankshaft Sprocket Key & Keyway
    GM156149Courtesy of GENERAL MOTORS CORP.
  1. Install the key into the crankshaft keyway, if previously removed.
    2. Fig 2: Crankshaft Key
    GM1272887Courtesy of GENERAL MOTORS CORP.
  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 CORP.
  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 CORP.
  4. Use the EN-47812  (1) and the J 41665  (2) in order to install the crankshaft sprocket. See Special Tools .

    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 CORP.
  6. Compress the timing chain tensioner guide and install the EN 46330  (LS9 only). See Special Tools .
    7. Fig 6: View Of Timing Chain Tensioner
    GM1658251Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  7. Install the timing chain tensioner (232) and bolts (231) and tighten to 25 N.m (18 lb ft) (LS9 only).
    8. Fig 7: Timing Chain Dampener & Bolts
    GM1552490Courtesy of GENERAL MOTORS CORP.
  8. Install the bolts (231) and chain dampener (232) (LS7 only).
    9. Fig 8: Identifying Camshaft Sprocket, Bolt & Timing Chain
    GM2173556Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • The sprocket teeth and timing chain must mesh.
    • The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly.
  9. Install the camshaft sprocket (2), timing chain (3), and bolt (1).
    10. Fig 9: Aligning Sprockets
    GM1649254Courtesy of GENERAL MOTORS CORP.
  10. 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.
    11. Fig 10: Timing Belt Tensioner Retaining Pin
    GM2173570Courtesy of GENERAL MOTORS CORP.
  11. Remove the EN 46330  (LS9 only). See Special Tools .
    12. NOTE: Do not apply threadlock to the flex plate bolts at this time.
  12. Temporarily install the automatic transmission flex plate or manual transmission flywheel and bolts. Refer to Engine Flywheel Installation (6.2L LS3) or Engine Flywheel Installation (6.2L LS9) or Engine Flywheel Installation (7.0L) .
    13. Fig 11: Flywheel Holding Tool
    GM1559840Courtesy of GENERAL MOTORS CORP.
  13. Install the J 42386-A  and bolts. Use one M10 - 1.5 x 120 mm bolt and one M10 - 1.5 x 45 mm bolt for proper tool operation. Tighten the J 42386-A  bolts to 50 N.m (37 lb ft). See Special Tools .
  14. Remove the J 42386-A  and bolts. See Special Tools .
    15. Fig 12: Identifying Camshaft Sprocket, Bolt & Timing Chain
    GM2173556Courtesy of GENERAL MOTORS CORP.
  15. Install the camshaft sprocket bolts and tighten to 30 N.m (22 lb ft).
  16. Remove the automatic transmission flex plate or manual transmission flywheel and bolts. Refer to Engine Flywheel Removal (6.2L LS3) or Engine Flywheel Removal (6.2L LS9) or Engine Flywheel Removal (7.0L LS7) .
  17. Install the oil pump. Refer to Oil Pump, Screen and Crankshaft Oil Deflector Installation (6.2L LS3) .
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