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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) >> Engine Flywheel Replacement (LS9 and LSA) >> Installation Procedure

Installation Procedure

NOTE: For manual transmission applications, note the position and direction of the engine flywheel before removal. The flywheel does not use a locating pin for alignment. Mark or scribe the end of the crankshaft and the flywheel before component removal. The engine flywheel must be reinstalled to the original position and direction. The engine flywheel will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a 3 stage tightening process.
DO NOT remove the prop shaft hub or flex plate from the automatic transmission engine flywheel. The flywheel, prop shaft hub, and flex plate are balanced as an assembly. If service is required, the entire flywheel assembly should be replaced.
    Fig 1: View Of Flywheel & Bolts
    GM2054034Courtesy of GENERAL MOTORS CORP.
  1. Install the flywheel (2) to the crankshaft.
  2. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the threads of the flywheel bolts (1).
    3. Fig 2: Flywheel Holding Tool
    GM2054464Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  3. Install the J 42386-A  and bolts. Use one M10 - 1.5 x 120 mm 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 .
    4. Fig 3: Identifying Flywheel Bolt Tightening Sequence
    GM2054465Courtesy of GENERAL MOTORS CORP.
  4. Install the engine flywheel bolts.
    1. Tighten the engine flywheel bolts (1-9) a first pass in sequence to 20 N.m (15 lb ft).
    2. Tighten the engine flywheel bolts (1-9) a second pass in sequence to 50 N.m (37 lb ft).
    3. Tighten the engine flywheel bolts (1-9) a final pass in sequence to 100 N.m (74 lb ft) using the J 45059  .
  5. Install the driveline support, if equipped with an automatic transmission. Refer to Driveline Support Assembly Replacement (With Manual Transmission) , or DRIVELINE SUPPORT ASSEMBLY REPLACEMENT (WITH AUTOMATIC TRANSMISSION) .
  6. Install the clutch assembly, if equipped with a manual transmission. Refer to Clutch Assembly Replacement (LS9) .
  7. Install the catalytic converter.
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