Toyota Celica 1986-1993 Repair Guide

Brake Pads

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CAUTION
Brake shoes and pads may 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 surfaces. When cleaning brake surfaces, use a commercially available brake cleaning fluid.

REMOVAL & INSTALLATION





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Fig. Fig. 1 Front brake components1986-87 Celica shown



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Fig. Fig. 2 Front brake components1988-89 2wd Celica shown

1986-87
  1. Loosen the front wheel lugs slightly, then raise and safely support the front of the car. Remove the front wheel(s) and temporarily attach the rotor disc with two of the wheel nuts.
  2.  
  3. Remove the two bolts from the torque plate.
  4.  



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Fig. Fig. 3 Front brake components1988-89 4wd Celica shown

  1. Remove the brake caliper and suspend it with a piece of wire from the strut spring so that the brake hose is not under stress. Do NOT disconnect the brake hose.
  2.  
  3. Remove the two brake pads, two anti-squeal shims, two wear indicator plates and four pad support plates. Note the various positions of the parts removed to make installation easier.
  4.  



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Fig. Fig. 4 Front brake components1990-91 Celica shown



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Fig. Fig. 5 Front brake components1992-93 Celica shown

  1. Check the rotor thickness and disc runout as described in this section.
  2.  

To install:

  1. Install the four pad support plates and a pad wear indicator plate on the inside brake pad.
  2.  


WARNING
Make sure that the arrow on the pad wear indicator is pointing in the rotating direction of the disc.

  1. Install the new brake pads onto the support plates, then install the two anti-squeal springs. Do NOT allow oil and grease to come in contact with the surface of the pads.
  2.  
  3. Remove the master cylinder cap and take a small amount of brake fluid from the reservoir, if necessary, so that it does not overflow when the caliper piston is pushed in. Force the piston back into the caliper bore using a large C-type clamp to accommodate the greater thickness of the new brake pads. Always do one wheel at a time, because at this point there is the possibility of the opposite piston extending out of the caliper bore. If the piston is difficult to push into the caliper, loosen the bleeder plug and allow fluid to exit the caliper while depressing the piston into the caliper bore.
  4.  
  5. Remove the supporting wire and position the brake cylinder carefully to avoid wedging the dust boot. Install the cylinder installation bolts. Torque the bolts to 18 ft. lbs. (24 Nm).
  6.  
  7. Install the front wheels and lower the vehicle.
  8.  
  9. Check the master cylinder level to ensure that it is on the max line.
  10.  


CAUTION
Before moving the vehicle, make sure to pump the brake pedal with short strokes to seat the pads against the rotors, otherwise the vehicle may have no braking.

1988-93
  1. Raise and support the vehicle safely.
  2.  
  3. Remove the wheels.
  4.  
  5. If necessary, siphon a sufficient quantity of brake fluid from the master cylinder reservoir to prevent any brake fluid from overflowing the master cylinder when removing or installing new pads. This may be necessary as the piston must be forced into the caliper bore to provide sufficient clearance when installing the pads.
  6.  
  7. Grasp the caliper from behind and carefully pull it to start to seat the piston(s) in its bore.
  8.  
  9. Loosen and remove the 2 caliper mounting pins (bolts) and then remove the caliper assembly, without disconnecting the brake line. Position it aside.
  10.  
  11. Slide out the old brake pads along with any anti-squeal shims, springs, pad wear indicators and pad support plates. Make sure to note the position of all assorted pad hardware.
  12.  

To install:

  1. Check the brake disc (rotor) for thickness and run-out. Inspect the caliper and piston assembly for breaks, cracks, fluid seepage or other damage. Overhaul or replace as necessary.
  2.  
  3. Install the pad support plates into the torque plate.
  4.  
  5. Install the pad wear indicators onto the pads. Be sure the arrow on the indicator plate is pointing in the direction of rotation.
  6.  
  7. Install the anti-squeal shims on the outside of each pad and then install the pad assemblies into the torque plate.
  8.  
  9. Position the caliper back down over the pads. If it won't fit, use a C-clamp or hammer handle and carefully force the piston straightly into its bore.
  10.  
  11. Install and tighten the caliper mounting bolts to 18 ft. lbs. (25 Nm) on the 13-inch rotor or to 29 ft. lbs (39 Nm) on the other rotors.
  12.  
  13. Install the wheels and lower the vehicle. Check the brake fluid level.
  14.  


CAUTION
Before moving the vehicle, make sure to pump the brake pedal with short strokes to seat the pads against the rotors, otherwise the vehicle may have no braking.

INSPECTON



If you hear a squealing noise coming from the front brakes while driving, check the brake lining thickness and pad wear indicator by looking into the inspection hole on the brake cylinder with the front wheels removed and the vehicle properly supported. The wear indicator is designed to emit the squealing noise when the brake pad wears down to 2.5mm at which time the pad wear plate and the rotor disc rub against each other. If there is evidence of the pad wear indicator contacting the rotor disc, the brake pads should be replaced.

To inspect the brake lining thickness, look through the inspection hole and measure the lining thickness. Also looks for signs of uneven wear. The minimum allowable thickness is 0.039 in. (1mm) at which time the brake pads must be replaced.


WARNING
Always replace the pads on both front wheels. When inspecting or replacing the brake pads, check the thickness of the rotors and the surfaces of the disc rotors for scoring, wear and runout, which can cause pedal pulsation. The rotors should be resurfaced or replaced.



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Fig. Fig. 6 Brake pad wear indicator locationCelica



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Fig. Fig. 7 Checking brake pad lining thicknessCelica

 
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