Nissan Z - ZX 1970-1988 Repair Guide

Brake Pads

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INSPECTION



1970-78 Models

The brake pads must be removed from the caliper for inspection. Refer to the removal procedures in this section.

  1. Clean the pad with a stiff brush.
  2.  
  3. Check the pad for:

    Heavy saturation with fluid or grease
     
    Friction material thickness of less than 2mm or overall thickness of less than 7.5mm
     

  4.  

If either condition applies, replace both pads with a new set. This minimum thickness measurement may disagree with your state inspection laws. If so, consider the thicker measurement as the minimum standard.

1979-88 Models

An inspection slot is provided in the top of the caliper for checking the pad thickness. However, if the thickness seems marginal, the pads should be removed from the caliper and checked. Minimum thickness for the pads is 0.08 in. (2mm). This measurement may disagree with your state inspection laws.

Always replace all of the pads on both front wheels at the same time. When inspecting or replacing the pads, check the surface of the rotors for scoring or wear. The rotors should be removed for resurfacing if badly scored.

REMOVAL & INSTALLATION



1970-78 Models

See Figure 1

  1. Raise and support the front of the vehicle on jackstands. Remove the wheel.
  2.  

Since these vehicles have fixed brake calipers, pad removal and installation can be performed without removing the calipers.

  1. Remove the clips, the retaining pins and the anti-squeal spring.
  2.  
  3. Remove the pads and anti-squeal shim.
  4.  
  5. Clean all of the caliper and pad locating parts.
  6.  



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Fig. Fig. 1: Front brake caliper components-1970-78 models

  1. Loosen the master cylinder reservoir cap. Using a C-clamp, force the piston back into the cylinder to accommodate the greater thickness of a new pad.
  2.  
  3. Apply a light coat of grease to the sliding surfaces of the caliper and both sides of the shim. The shim should only be greased along the round cut-out which fits around the piston.
  4.  
  5. Install the pad and anti-squeal shim. The shim arrow must point in the direction of forward rotation. Install the anti-squeal spring and retaining pin, then secure them with the clip.
  6.  
  7. Depress and release the brake pedal several times.
  8.  

1979-88 Models

See Figures 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11

  1. Raise and support the front of the vehicle on jackstands. Remove the wheels.
  2.  
  3. Remove the lower pin bolt which retains the caliper to the torque member.
  4.  

Since these vehicles have floating brake calipers, the calipers must be pivoted out of the way before pad removal and installation can be performed.

  1. Rotate the caliper up and out of the way, exposing the pads. Do not try to move the caliper sideways.
  2.  
  3. Remove the pad retainers, the inner and outer shims, then the pads.
  4.  
  5. To install, clean the piston end and pin bolts.
  6.  



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Fig. Fig. 2: Brake caliper and pad components-1979-88 models



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Fig. Fig. 3: Use a C-clamp to compress the piston into the cylinder bore



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Fig. Fig. 4: Loosen and remove the lower caliper retaining bolt ...



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Fig. Fig. 5: ... then the upper retaining bolt ...



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Fig. Fig. 6: ... and slide the caliper off



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Fig. Fig. 7: With the caliper removed, you can see the pads and assorted hardware



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Fig. Fig. 8: Remove the shim from the brake pad



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Fig. Fig. 9: Remove the brake pad from the carrier



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Fig. Fig. 10: Remove the pad retainer clips and inspect



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Fig. Fig. 11: Bleed the brakes, if needed

  1. Install a new inner pad. Rotate the caliper back down into place, slightly open the bleeder screw, then using a long bar, lever the caliper to the outside to press the piston into place. Rotate the caliper back up and out of the way.
  2.  
  3. Lightly coat the sliding surfaces of the torque member with grease. Install a new outer pad with the inner and outer shims. Install the pad retainers; be careful not to install them upside down.
  4.  
  5. Rotate the caliper down and install the pin bolt. Tighten to 16-23 ft. lbs. (22-31 Nm).
  6.  
  7. Apply the brakes a few times to seat the pads. Check the master cylinder level and add fluid if necessary. Bleed the brakes if necessary.
  8.  

 
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