GM Prizm/Nova 1985-1993 Repair Guide

Flywheel and Ring Gear

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REMOVAL & INSTALLATION



This procedure may be performed with the engine in the car, however, access will be cramped.

  1. Remove the transaxle, following procedures outlined in Drive Train .
  2.  
  3. For cars equipped with automatic transmissions:
    1. Matchmark the torque converter and the driveplate. Correct positioning will be required during reassembly.
    2.  
    3. Remove the bolts holding the torque converter to the driveplate and remove the torque converter. DON'T drop it.
    4.  
    5. Matchmark the driveplate and the crankshaft.
    6.  
    7. Loosen the retaining bolts a little at a time and in a crisscross pattern. Support the driveplate as the last bolts are removed and then lift the driveplate away from the engine.
    8.  

  4.  
  5. For manual transmission cars:
    1. Matchmark the pressure plate assembly and the flywheel.
    2.  
    3. Loosen the pressure plate retaining bolts a little at a time and in a crisscross pattern. Support the pressure plate and clutch assembly as the last bolt is removed and lift them away from the flywheel.
    4.  
    5. Matchmark the flywheel and crankshaft. Loosen the retaining bolts evenly and in a crisscross pattern. Support the flywheel during removal of the last bolts and remove the flywheel.
    6.  

  6.  
  7. Carefully inspect the teeth on the flywheel or driveplate for any signs of wearing or chipping. If anything beyond minimal contact wear is found, replace the unit.
  8.  


CAUTION
The clutch disc contains asbestos, which has been determined to be a cancer causing agent. Never clean the clutch assembly with compressed air! Avoid inhaling dust from the clutch during disassembly. When cleaning components, use commercially available brake cleaning fluids.

Since the flywheel is driven by the starter gear, you would be wise to inspect the starter drive if any wear is found on the flywheel teeth. A worn starter can cause damage to the flywheel.

  1. When reassembling, place the flywheel or driveplate in position on the crankshaft and make sure the matchmarks align. Install the retaining bolts finger tight.
  2.  
  3. Tighten the bolts in a diagonal pattern and in 3 passes. Tighten the flywheel bolts (manual transmission) to 58 ft. lbs. or the driveplate bolts (automatic transmission) to 47 ft. lbs.
  4.  
  5. Install either the clutch cover mounting bolts to 14 ft. lbs. or the torque converter, tightening its mounting bolts to 20 ft. lbs. on Nova models and 31 ft. lbs. on Prizm models.
  6.  

If the clutch appears worn or cracked in any way, replace it with a new disc, pressure plate and release bearing. The slight extra cost of the parts will prevent having to remove the transaxle again later.

  1. Reinstall the transaxle assembly.
  2.  

RING GEAR REPLACEMENT



If the ring gear teeth on the driveplate or flywheel are damaged, the unit must be replaced. The ring gear cannot be separated or reinstalled individually.

If a flywheel is replaced on a manual transmission car, the installation of a new clutch disc, pressure plate and release bearing is highly recommended.

 
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