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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) >> Removal Procedure

Removal Procedure

CAUTION: Failure to follow the proper removal and installation procedures may result in damage to the engine crankshaft thrust bearing.
CAUTION: When tilting down the rear of the driveline, observe the clearance between the rear of the engine and the composite dash panel. Do not allow the engine to rest unsupported against the composite dash panel, or vehicle damage may result.
CAUTION: When lowering and removing the rear of the driveline, observe the clearance between the rear of the transaxle assembly and the underbody to prevent damage.
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: Marking End Of Crankshaft & Manual Transmission Flywheel
    GM506140Courtesy of GENERAL MOTORS CORP.
  1. Remove the catalytic converters.
  2. Remove 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) .
  3. Remove the clutch assembly, if equipped with a manual transmission. Refer to Clutch Assembly Replacement (LS9) .
  4. Mark or scribe the end of the crankshaft and the manual transmission flywheel. Refer to Engine Balancing .
  5. Fig 2: Automatic Transmission Engine Flywheel & Bolts
    GM651889Courtesy of GENERAL MOTORS CORP.
  6. If equipped with an automatic transmission, remove the engine flywheel bolts.
  7. Fig 3: View Of Engine Flywheel & Bolts (Manual Transmission)
    GM156166Courtesy of GENERAL MOTORS CORP.
  8. If equipped with a manual transmission, remove the engine flywheel bolts.
  9. Remove the engine flywheel.