Pontiac Fiero 1984-1988 Repair Guide

Brake Pads

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INSPECTION




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



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Fig. Fig. 1 Look through the inspection hole in the caliper housing to observe the brake pad lining thickness

The pad thickness should be inspected every time that the wheels are removed. Pad thickness can be checked by looking down through the inspection hole in the top of the caliper. If the thickness of the pad is worn to within 0.030 in. (0.76mm) of the rivet at either end of the pad, all the pads should be replaced. A thermal material is sandwiched between the lining and backing. Don't include this material when determining the lining thickness. This is the factory recommended measurement. Your state's automobile inspection laws may be different.

Always replace all pads on both front wheels at the same time. Failure to do so will result in uneven braking action and premature wear.

REMOVAL & INSTALLATION



1984-87 Models


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Fig. Fig. 2 Front disc brake calipers external components-1984-87 models



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Fig. Fig. 3 Remove the caliper mounting Torx® bolts



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Fig. Fig. 4 Compress the piston using adjustable pliers-1984-87 models



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Fig. Fig. 5 Position the pliers over the caliper support bracket and inboard caliper housing



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Fig. Fig. 6 The brake caliper should not hang by the hose. Use a piece of wire or bungee cord to support the caliper



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Fig. Fig. 7 The brake pads can now be removed from the caliper



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Fig. Fig. 8 Remove the outboard shoe using a suitable prytool



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Fig. Fig. 9 Install the inboard brake pad in the caliper



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Fig. Fig. 10 When installing the outboard brake pad, make sure the wear sensor is at the leading edge of the pad during forward wheel rotation



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Fig. Fig. 11 The caliper housing cavities should be liberally lubricated using silicone grease

  1. Siphon 2 / 3 of the brake fluid from the master cylinder reservoir.
  2.  
  3. Loosen the wheel lug nuts and raise the car. Support the car safely with jackstands then remove the wheel.
  4.  
  5. Remove the two boots and mounting bolts using a No. 50 Torx® wrench.
  6.  
  7. Position 4-inch adjustable pliers over the inboard surface of the caliper housing and caliper support bracket.
  8.  
  9. Squeeze the pliers to compress the piston back into the caliper bore and provide clearance between the linings and rotor.
  10.  
  11. Remove the caliper from the rotor and suspend with a wire hook from the suspension. Do not allow the caliper to hang by the hose.
  12.  
  13. Remove the shoe and lining assemblies from the caliper. To remove the outboard shoe and lining use a suitable tool to disengage the buttons on the shoe from the holes in the caliper.
  14.  
  15. Remove the sleeves from the mounting bolt holes.
  16.  
  17. Remove the bushings from the grooves in the mounting bolt holes.
  18.  

To install:

  1. Bottom the piston in the caliper bore before installing new linings. This can be done with a large C-clamp.
  2.  
  3. Use new bushings and sleeves and lubricate with a silicone lubricant.
  4.  
  5. Install the inboard shoe and lining as shown in the illustration.
  6.  
  7. Install the outboard shoe and lining with the wear sensor at the leading edge of the shoe during forward wheel rotation.
  8.  
  9. Liberally fill both cavities in the caliper housing between the bushings with silicone grease.
  10.  
  11. Install the sleeves and boots in the caliper.
  12.  
  13. Install the caliper over the rotor in the mounting bracket.
  14.  
  15. Install the mounting bolts and torque to 21-35 ft. lbs. (28-41 Nm).
  16.  
  17. Install the wheel assemblies and torque the lug nuts to 100 ft. lbs. (136 Nm). Lower the vehicle and pump the brake pedal before moving the vehicle.
  18.  

1988 Models


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Fig. Fig. 12 Components of the front caliper and brake pad assemblies-1988 models



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Fig. Fig. 13 The spring pins should be removed from the caliper using tools J-36620 and J-6125-1B, or their equivalents-1988 models



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Fig. Fig. 14 A pair of adjustable pliers may be used to compress the caliper piston-1988 models



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Fig. Fig. 15 Install the spring pin in the caliper assembly by tapping it into position using a soft brass drift and a hammer-1988 models

The pad thickness should be inspected every time that the wheels are removed. Pad thickness can be checked by looking down through the inspection hole in the top of the caliper. If the thickness of the pad is worn to within 0.030 in. (0.76mm) of the rivet at either end of the pad, all the pads should be replaced. A thermal material is sandwiched between the lining and backing. Don't include this material when determining the lining thickness. This is the factory recommended measurement. Your state's automobile inspection laws may be different.


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

Always replace all pads on both front wheels at the same time. Failure to do so will result in uneven braking action and premature wear.

  1. Siphon 2 / 3 of the brake fluid from the master cylinder reservoir.
  2.  
  3. Loosen the wheel lug nuts and raise the car. Support the car safely with jackstands then remove the wheels.
  4.  
  5. Install two adjacent lug nuts to retain the rotor.
  6.  
  7. Bottom the piston into the caliper bore to provide clearance between the brake pads and rotor. This can be done with a caliper compressing tool J-36621 or a pair of locking pliers.
  8.  


CAUTION
Be prepared to catch the springs when removing spring pins. Springs may fly out causing personal injury.

  1. Remove the spring pins with the use of spring pin removing tools J-36620 onto J-6125-1B. Insert the rod completely through the pin and install the threaded tip as far as possible. Thrust weight on J-6125-1B outward against the tool handle to drive the pin out and remove the springs.
  2.  
  3. Remove both brake pads by pulling straight out of the caliper with the locking pliers.
  4.  

To install:

  1. Before installing new brake pads, the piston must be bottomed into the caliper bore.
  2.  
  3. Install the inboard pad with the wear sensor at the leading edge of the shoe during forward wheel rotation. Install the outboard brake pad in the same way.
  4.  


WARNING
Do not use a steel drift to install the spring pins. This will damage the ends of the pins causing later removal difficult.

  1. Install one spring pin while aligning the holes in the brake pads. Tap the pin with a soft brass drift and hammer until the end of the pin just emerges from the inboard face of the caliper housing.
  2.  
  3. Install the springs and the remaining spring pin. The hock end of the spring has to be under the spring pin. Make sure the springs are centered on the pad flanges with each spring end projecting under the pins.
  4.  
  5. Install the wheel assemblies and torque the lug nuts to 100 ft. lbs. (136 Nm). Lower the vehicle and pump the brake pedal before moving the vehicle.
  6.  

 
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