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.  



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



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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.
  4.  
  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.