Nissan Z - ZX 1970-1988 Repair Guide

Flywheel/Drive Plate and Ring Gear

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Always use new bolts when installing the flywheel/drive plate. On vehicles equipped with a manual transmission, inspect the clutch shaft pilot bushing in the crankshaft. If the bushing is excessively worn, remove it with an expanding puller and a slide hammer, then tap a new bushing into place.

REMOVAL & INSTALLATION



See Figure 1

  1. Refer to the Manual Transmission or Automatic Transmission removal and installation procedures in Drive Train , then remove the transmission from the engine.
  2.  

Before removing the pressure plate from the flywheel (or torque converter from the drive plate), be sure to mark the relationship to one another.

Click image to see an enlarged view

Fig. Fig. 1: Installing a disc pilot tool

  1. If equipped with a manual transmission, perform the following:
    1. Using the Clutch Disc Alignment tool No. KV30100100 (except VG) or ST20600000 (VG), support the clutch assembly.
    2.  
    3. Loosen the pressure plate-to-flywheel bolts, evenly, a little at a time, in a crisscross fashion, until the spring pressure is released.
    4.  
    5. Remove the pressure plate, clutch disc and the alignment tool.
    6.  

  2.  
  3. If equipped with an automatic transmission, perform the following:
    1. Remove the torque converter cover plate.
    2.  
    3. Remove the torque converter-to-drive plate bolts.
    4.  
    5. Slide the torque converter back into the transmission and tie it into place.
    6.  

  4.  
  5. Remove the flywheel/drive plate-to-crankshaft bolts and the flywheel/drive plate.
  6.  
  7. To install, reverse the removal procedures. Tighten the flywheel/drive plate-to-crankshaft bolts to 72-80 ft. lbs. (98-108 Nm) for VG or 94-108 ft. lbs. (127-147 Nm) for all other engines, and the pressure plate/torque converter-to-flywheel/drive plate bolts 15-22 ft. lbs. (21-29 Nm).
  8.  

RING GEAR REPLACEMENT



  1. To remove the ring gear from the flywheel, perform the following:
    1. Secure the flywheel so that the ring gear may be removed without damaging it.
    2.  
    3. Using a cold chisel and a hammer, cut through the ring gear. Remove the ring gear from the flywheel.
    4.  

  2.  


WARNING
When cutting through the ring gear, be careful not to damage the flywheel.

  1. Using a clean rag and solvent clean the ring gear-to-flywheel mounting surface.
  2.  
  3. Using a new ring gear, heat it to 356-428°F (180-220°C).
  4.  
  5. Using a clean, flat surface (which heat will not affect) and a mallet (if necessary), place the HOT ring gear on the surface. Insert the flywheel into the ring gear, making sure that both items are flat on the surface; if necessary, use the mallet to drive the flywheel into the ring gear.
  6.  
  7. Allow the ring gear to COOL onto the flywheel, then install the flywheel to the engine.
  8.  

 
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