Toyota Celica, Corolla, ECHO & MR2 1999-05

Brake Pads

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Inspection



If you hear a squealing noise coming from the brakes while driving, check the brake lining thickness and pad wear indicator by looking into the inspection hole on the brake cylinder with the 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 are traces 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 using a machinists rule. Also looks for signs of uneven wear. Standard thickness is 10mm. The minimum allowable thickness is 0.039 inch. (1mm) at which time the brake pads must be replaced.



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Fig. An inspection hole is located on the side of the caliper to check brake pad lining thickness

Always replace the pads on both wheels. When inspecting or replacing the brake pads, check the surface of the disc rotors for scoring, wear and runout. The rotors should be resurfaced if badly scored or replaced if badly worn.

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove the wheels.
  4.  
  5. Loosen and remove the caliper mounting bolts, then remove the caliper assembly, without disconnecting the brake line. Position it aside.
  6.  
  7. Slide out the old brake pads along with any anti-squeal shims, springs, pad wear indicators and pad support plates.
  8.  

To install:

  1. Install the pad support plates into the torque plate.
  2.  
  3. Install the pad wear indicators onto the pads. Be sure the arrow on the indicator plate is pointing in the direction of rotation.
  4.  
  5. Install the anti-squeal shims on the outside of each pad and then install the pad assemblies into the torque plate.
  6.  
  7. Compress the caliper piston into the bore. For Corolla rear calipers, use tool SST 09719-14020, to rotate the piston clockwise while pressing it into the bore until it locks.
  8.  
  9. Position the caliper back down over the pads.
  10.  
  11. Install and tighten the caliper mounting bolts.
  12.  
  13. Install the wheels. Check the brake fluid level.
  14.  

When replacing brake pads on a vehicle, always replace both sides at the same time. In other words, if the brake pads are worn only on the drivers side of the vehicle, do NOT just replace the drivers side pads, replace the passengers side also.



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Fig. Exploded view of the front brake pads and related components-7A-FE engine



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Fig. Exploded view of the front brake pads and related components-5S-FE engine

  1. Loosen the wheel lug nuts.
  2.  

  1. Raise and safely support the vehicle securely on jackstands.
  2.  
  3. Remove the wheel.
  4.  
  5. Temporarily retain the brake disc with a couple of lug nuts.
  6.  
  7. 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 is necessary as the piston must be forced into the caliper bore to provide sufficient clearance when installing the pads.
  8.  
  9. Hold the caliper sliding pin on the bottom and loosen the installation bolt.
  10.  



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Fig. Using a slim line wrench, loosen the installation bolt and use another wrench to retain the sliding pin



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Fig. Once removed, inspect the bolt threads

  1. Grasp the caliper from behind and carefully pull it to seat the piston in its bore.
  2.  
  3. On some models it will be necessary to remove the two caliper mounting pins (bolts), then remove the caliper assembly. Suspend the caliper with a wire. On other calipers, remove just the lower bolt and lift the caliper up and suspend it from a wire. Do NOT disconnect the brake line.
  4.  



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Fig. Raise the outer portion of the caliper

  1. 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.
  2.  



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Fig. Unclasp and remove the anti-squeal springs ...



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Fig. ... and slide the brake pads and shims out of the caliper



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Fig. Inspect the tabs on the shims, be sure they are in good condition for reuse



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Fig. Check the pad wear indicators and support plates

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.  



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Fig. The wear indicators slide over the end of the pads as shown

  1. Apply brake grease to both sides of the inner anti squeal shim. Install the anti-squeal shims on the outside of each pad and then install the pad assemblies into the torque plate.
  2.  

There should be no grease or oil adhering to the friction surfaces of the pads or disc.

  1. 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 into its bore.
  2.  



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Fig. Note the piston is slightly away from the caliper casing and must be pushed in



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Fig. Seat the piston back into its bore using a clamp



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Fig. Now the piston is flush with the caliper case

  1. Install the caliper over the brake disc.
  2.  
  3. Hold the sliding pin and tighten the installation bolt to 25 ft. lbs. (34 Nm).
  4.  
  5. Install the wheels and lower the vehicle. Check the brake fluid level. Before moving the vehicle, make sure to pump the brake pedal to seat the pads against the rotors.
  6.  

 
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