Nissan Z - ZX 1970-1988 Repair Guide

Clutch Disc And Pressure Plate

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REMOVAL & INSTALLATION



See Figures 1 and 2


CAUTION
The clutch driven disc may contain asbestos, which has been determined to be a cancer causing agent. Never clean clutch surfaces with compressed air! Avoid inhaling any dust from any clutch surface! When cleaning clutch surfaces, use a commercially available brake cleaning fluid.

  1. Refer to the Transmission, Removal and Installation procedures, in this section and remove the transmission.
  2.  
  3. Using the Clutch Aligning Bar tool No. KV30100100 (1970-83 models) or ST20600000 (1985-88 models) or equivalent, insert it all the way into the clutch disc hub. Mark the clutch assembly-to-flywheel relationship with paint or a center punch so that the clutch plate can be assembled in the same position from which it is removed.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Support the clutch disc and plate assembly using a pilot tool



Click image to see an enlarged view

Fig. Fig. 2: Coat the indicated area with grease

Using the clutch aligning bar, support the weight of the clutch disc during removal.

  1. Loosen the pressure plate-to-flywheel bolts evenly, one turn at a time, until the spring pressure is released.
  2.  
  3. Remove the bolts and pull the pressure plate and disc from the flywheel.
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  5. Inspect the flywheel for scoring, roughness or signs of overheating. Light scoring of the flywheel may be cleaned up with emery cloth but any deep grooves or scoring warrant replacement or refacing (if possible).
  6.  

If the clutch faces or flywheel are oily, inspect the transmission front cover oil seal, the pilot bushing and the engine rear seals for leakage, then correct the problem before replacing the clutch.

  1. If the pilot bushing in the crankshaft is worn, replace it. Install it using a soft hammer. The installation depth should be 0.18-0.20 in. (4.6-5.0mm) for 1970-77 models, 0.37 in. (9.5mm) for 1978 models or 0.16 in. (4.0mm) for 1979 and later models.
  2.  

When installing the pilot bushing, the depth is measured from the end of the crankshaft flange to the transmission end. The factory-supplied part does not have to be oiled but check the procedure if you are using an aftermarket part.

  1. Inspect the clutch cover for wear or scoring, then replace if necessary. The pressure plate and spring cannot be disassembled; you must replace the clutch cover as an assembly.
  2.  
  3. Inspect the clutch release bearing; if it is rough or noisy, it should be replaced by performing the following procedures:
    1. Using a puller, remove the bearing.
    2.  
    3. Using a press, install the new bearing.
    4.  
    5. After installation, coat the groove in the sleeve, the contact surfaces of the release lever, pivot pin and sleeve and the release bearing contact surfaces on the transmission front cover with a light coat of grease.
    6.  

  4.  


WARNING
When greasing the clutch release bearing, be careful not to use too much grease, since it will run at high temperatures and get onto the clutch faces.

    1. Reinstall the release bearing on the lever.
    2.  


  1. Apply a thin coat of grease to the pressure plate wire ring, diaphragm spring, clutch cover grooves and the drive bosses on the pressure plate.
  2.  
  3. Apply a thin coat of Lubriplate® to the splines in the driven plate. Slide the clutch disc into the splines, then move it back and forth several times. Remove the disc and wipe off the excess lubricant. Be very careful not to get any grease on the clutch faces.
  4.  
  5. Assemble the clutch cover and the clutch plate on the clutch alignment tool.
  6.  
  7. Align the marks made on the clutch cover and the flywheel (if the old cover is being used) and install the clutch cover-to-flywheel bolts. Dowels are used to locate the clutch cover on the flywheel. Tighten the bolts in a crisscross pattern, one turn at a time, to 12-15 ft. lbs. (16-19 Nm) for 1970-82 models or 16-20 ft. lbs. (21-26 Nm) for 1983-88 models. Remove the clutch alignment tool.
  8.  
  9. To complete the installation, reverse the removal procedures.
  10.  

 
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