Question about 2001 BMW 325

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325i brakes, inboard pad worn to zero no wearing on outboard pad

Are my front calipers self adjusting? anything adjustments to know when replacing pads so they adjust/wear equally?

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  • Anonymous Mar 22, 2014

    new brake pads and caliper have been installed.

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  • BMW Master
  • 1,779 Answers

If the pads are not wearing equally, u have a caliper problem. What is happening is the caliper isn't completely releasing when u take your foot off the brake (it's dragging). When u see this, u should either rebuild the caliper, or buy and install a new or rebuilt unit. Whenever replacing pads or shoes, flush out the brake lines. Contaminated brake fluid is the usual reason for caliper failure, resulting in premature brake wear. Also clean up the caliper points of contact and use special brake grease to lube calipers.

Posted on Jan 08, 2009

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2 Answers

Why do one side of the brake pad is worn more then the other


To some degree this is normal.
When brake pressure is applied, the inboard pad strikes the rotor first. Then as more pressure is applied, the entire caliper slides so that the outboard pad makes contact. This is a split second difference but over the life of the brakes it can add up.
If you are seeing a difference in wear in only a few months of replacement, something could be sticking.

Aug 25, 2012 | 1996 Geo Prizm

1 Answer

2001 GMC Yukon 4wd -- inside of front brake rotors worn unevenly, what causes this? Caliper slide pins seem to be OK, caliper slides against bracket OK. -David


This is not uncommon. It comes from the design of the disc brake systems which contain the one piston. The ideal condition would be that the clamping pressures are equal for both the inside/inboard pad and the outboard pad, but that just does not happen. It's always good to make sure that the slide pins are lubed with a good brake caliper grease and that you use a good quality original equipment brake pad set. I recomend using the AC Delco brand. This will also prevent any squeeking that you will get from "cheap" pads. Sounds like everything is working good. Let me know if you need anything else.

Jun 03, 2011 | 2001 GMC Yukon

1 Answer

I need to know how to change the front brakes on a 94 jeep grand cherokee laredo.


  1. Raise and support the vehicle safely using jackstands. Remove the wheel(s) on the side to be worked on.

NOTE: Removing a small amount of brake fluid from the master cylinder using a turkey baster


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Fig. 4: Tighten the C-clamp until the piston reaches the bottom of its bore


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Fig. 5: Remove the caliper mounting bolts


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Fig. 6: Slide the caliper off the brake rotor

  1. Drain a small amount of the brake fluid from the front reservoir using a suction gun or a turkey baster.
  2. Place a C-clamp on the caliper so that the solid end contacts the back of the caliper and the screw end contacts the metal part of the outboard brake pad.
  3. Tighten the clamp until the caliper moves far enough to force the piston to the bottom of the piston bore. This will back the brake pads off of the rotor surface to facilitate the removal and installation of the caliper assembly
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Fig. 7: Support the caliper so that no tension is placed on the brake hose


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Fig. 8: Hold the anti-rattle clip while removing the outboard pad (4)


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Fig. 9: Removing the outboard brake pad


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Fig. 10: Remove the inboard pad and anti-rattle clip


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Fig. 11: Removing the inboard brake pad


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Fig. 12: Removing the anti-rattle clip

  1. Remove the C-clamp.
Do not push down on the brake pedal or the piston and brake pads will return to their original positions up against the rotor.
  1. Remove the caliper mounting bolts. Tilt the top of the caliper outward and lift it off the rotor.
  2. Hold the anti-rattle clip against the caliper anchor plate and remove the outboard brake pad.
  3. Remove the inboard pad and the anti-rattle clip. Be sure that the support spring is removed with the inboard pad.
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Fig. 13: Install the support spring onto the shoe of the inboard brake pad


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Fig. 14: Installing the inboard pad


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Fig. 15: Piston extension on new and worn brake pads

  1. Use a piece of wire to support the caliper so that no tension is placed on the brake hose. Do not allow the caliper to hang by the brake hose.
To install:
  1. Clean all the mounting holes and bushing grooves in the caliper ears. Clean the mounting bolts. Replace the bolts if they are corroded or if the threads are damaged. Wipe the inside of the caliper clean, including the exterior of the dust boot. Inspect the dust boot for cuts or cracks and for proper seating in the piston bore. If evidence of fluid leakage is noted, the caliper should be rebuilt.
Do not use abrasives on the bolts in order not to destroy their protective plating. You should not use compressed air to clean the inside of the caliper, as it may unseat the dust boot seal.
  1. If not already in place, attach the support spring to the inboard brake pad.
  2. Install the anti-rattle clip on the trailing end of the inboard pad's anchor plate. The split end of the clip must face away from the rotor.
  3. Install the inboard pad in the caliper. The pad must lay flat against the piston.
  4. Install the outboard pad in the caliper while holding the anti-rattle clip.
  5. With the pads installed, position the caliper over the rotor.
Before securing the caliper, ensure the brake hose is not twisted, kinked or touching any chassis parts.
  1. Lubricate the caliper pins and bushings with silicone grease. Line up the mounting holes in the caliper and the support bracket and insert the mounting bolts. Make sure that the bolts pass under the retaining ears on the inboard shoes. Push the bolts through until they engage the holes of the outboard pad and caliper ears. Thread the bolts into the support bracket and tighten them to 7-15 ft. lbs. (9-20 Nm).
CAUTION On models with manual/power brakes, pump the pedal until the caliper pistons and brake shoes are seated. On models with anti-lock brakes, turn the ignition ON and allow the booster pump to build pressure. Pump the brake pedal until the shoes are seated and the indicator lights turn off.
  1. Fill the master cylinder with brake fluid and pump the brake pedal to seat the pads.
  2. Install the wheel assembly and lower the vehicle. Check the level of the brake fluid in the master cylinder and fill as necessary.

Remember to rate this, good luck.

Nov 04, 2010 | 1994 Jeep Grand Cherokee

1 Answer

96 chevy rear brake adjustment can't adjust the calibars looking for a diagram


There is no adjustment for the rear calipers. They work just like the front through pressure and wear on the pads. If you are getting poor stopping, or excessive stopping power, then the pads, quality and installation need to be inspected. There are 2 "dents" in the pistons to which the back of the inboard pad will fit into. If they dont, the pad sticks out too far and can cause the wheels to lock up upon braking. Let me know if this is the case.

May 31, 2010 | 1996 Chevrolet K1500

1 Answer

Need help changing brake pads and routers on 2003


Remove brake fluid from the master cylinder brake fluid reservoir until the reservoir is approximately 1/2 full. Discard the removed fluid.
  1. Raise and safely support the front of the vehicle. Remove the front wheels.
    1. Remove or disconnect the following:
    2. Front brake caliper guide pin bolts
    • Brake caliper by slowly sliding it up and off the adapter and brake rotor. Support the caliper out of the way with a strong piece of wire. Do not let the caliper hang by the brake hose or damage to the brake hose will result.
    1. If necessary, compress the caliper piston into the bore using a C-clamp. Insert a suitable piece of wood between the C-clamp and caliper piston to protect the piston.
    2. Outboard disc brake pad from the caliper by prying the brake pad retaining clip over the raised area on the caliper. Slide the brake pad down and off the caliper.
    • Inboard disc brake pad from the caliper by pulling the brake pad away from the caliper piston until the retaining clip on the pad is free from the caliper piston cavity
  • To install:
    1. Be sure the caliper piston has been completely retracted into the piston bore of the caliper assembly. This is required when installing the brake caliper equipped with new brake pads.
    2. If equipped, remove the protective paper from the noise suppression gaskets on the new disc brake pads.
    3. Install or connect the following:
      • New inboard disc brake pad into the caliper piston by pressing the pad firmly into the cavity of the caliper piston. Be sure the new inboard brake pad is seated squarely against the face of the brake caliper piston.
      • Outboard disc brake pad by sliding it onto the caliper assembly
      • Brake caliper assembly over the brake rotor and onto the steering knuckle adapter
      • Caliper guide pin bolts and torque to: 35 ft. lbs. (47 Nm) on 2002–04 models or 26 ft. lbs. (35 Nm) on 2005 models
      • Front. Apply the brake pedal several times until a firm pedal is obtained.
    4. Check the fluid level in the master cylinder and add fluid as necessary. Road-test the vehicle.

    For the rotors:

    1. Remove brake fluid from the master cylinder brake fluid reservoir until the reservoir is approximately 1/2 full. Discard the removed fluid.
    2. Raise and safely support the front of the vehicle. Remove the front wheels.
    1. Remove or disconnect the following:
    2. Front brake caliper guide pin bolts
    • Brake caliper by slowly sliding it up and off the adapter and brake rotor. Support the caliper out of the way with a strong piece of wire. Do not let the caliper hang by the brake hose or damage to the brake hose will result.
    1. If necessary, compress the caliper piston into the bore using a C-clamp. Insert a suitable piece of wood between the C-clamp and caliper piston to protect the piston.
    2. Outboard disc brake pad from the caliper by prying the brake pad retaining clip over the raised area on the caliper. Slide the brake pad down and off the caliper.
    • Inboard disc brake pad from the caliper by pulling the brake pad away from the caliper piston until the retaining clip on the pad is free from the caliper piston cavity
  • To install:
    1. Be sure the caliper piston has been completely retracted into the piston bore of the caliper assembly. This is required when installing the brake caliper equipped with new brake pads.
    2. If equipped, remove the protective paper from the noise suppression gaskets on the new disc brake pads.
    3. Install or connect the following:
      • New inboard disc brake pad into the caliper piston by pressing the pad firmly into the cavity of the caliper piston. Be sure the new inboard brake pad is seated squarely against the face of the brake caliper piston.
      • Outboard disc brake pad by sliding it onto the caliper assembly
      • Brake caliper assembly over the brake rotor and onto the steering knuckle adapter
      • Caliper guide pin bolts and torque to: 35 ft. lbs. (47 Nm) on 2002–04 models or 26 ft. lbs. (35 Nm) on 2005 models
      • Front. Apply the brake pedal several times until a firm pedal is obtained.
    4. Check the fluid level in the master cylinder and add fluid as necessary. Road-test the vehicle.

    May 28, 2010 | 2003 Chrysler Town & Country

    1 Answer

    Brake pad replacement


    Removal & Installation
    1. Before servicing the vehicle, refer to the Precautions section.
    2. Remove or disconnect the following:
      • Negative battery cable
      • Front wheels
    3. Place a C-clamp over the caliper as illustrated, place a screw drive head against the outboard pad and hook against the rear of the caliper. Slowly tighten the screw drive and retract the caliper pistons into their bores and breaking the outboard brake pad from the caliper fingers.
    4. Once the pad is free, slide the caliper in on the guides to provide clearance between the rotor and inboard pad.
    5. Place an appropriate prytool through the center opening in the top of the caliper behind the inboard pad between the pistons using care not to contact the piston boots. Pry the pad to free it from the pistons.
    6. Remove the two caliper guide pin bolts and position the caliper aside. Remove the brake pads.
    ff17c9d.gif
    Place a C-clamp over the caliper as illustrated

    b802acb.gif
    View of the caliper guide pins and boots (1), anti-rattle clips (2), brake rotor (3), outboard pad (4), caliper adapter (5) and inboard pad (6)

    To install:
    1. Completely compress the caliper pistons
    2. Install or connect the following:
      • Brake pads with anti-rattle clips onto the adapter
      • Caliper and align the guide pin bolt holes with the guide pins. Install the pin bolts and tighten to 32 ft. lbs. (43 Nm).
      • Banjo bolt with new washers on each side of the hose fitting and tighten to 35 ft. lbs. (47 Nm)
      • Wheels
      • Negative battery cable
    3. Check and adjust the brake system fluid level and road test the vehicle.

    Nov 01, 2009 | 2005 Chrysler Pacifica

    1 Answer

    How do i replace front pads on 2005 chrysler pacifica


    PLEASE DON'T FORGET TO RATE!!!!

    Removal & Installation
    1. Before servicing the vehicle, refer to the Precautions section.
    2. Remove or disconnect the following:
      • Negative battery cable
      • Front wheels
    3. Place a C-clamp over the caliper as illustrated, place a screw drive head against the outboard pad and hook against the rear of the caliper. Slowly tighten the screw drive and retract the caliper pistons into their bores and breaking the outboard brake pad from the caliper fingers.
    4. Once the pad is free, slide the caliper in on the guides to provide clearance between the rotor and inboard pad.
    5. Place an appropriate prytool through the center opening in the top of the caliper behind the inboard pad between the pistons using care not to contact the piston boots. Pry the pad to free it from the pistons.
    6. Remove the two caliper guide pin bolts and position the caliper aside. Remove the brake pads.
    24539c8.gif
    Place a C-clamp over the caliper as illustrated

    6ccd8b6.gif
    View of the caliper guide pins and boots (1), anti-rattle clips (2), brake rotor (3), outboard pad (4), caliper adapter (5) and inboard pad (6)

    To install:
    1. Completely compress the caliper pistons
    2. Install or connect the following:
      • Brake pads with anti-rattle clips onto the adapter
      • Caliper and align the guide pin bolt holes with the guide pins. Install the pin bolts and tighten to 32 ft. lbs. (43 Nm).
      • Banjo bolt with new washers on each side of the hose fitting and tighten to 35 ft. lbs. (47 Nm)
      • Wheels
      • Negative battery cable
    3. Check and adjust the brake system fluid level and road test the vehicle.

    Nov 01, 2009 | 2005 Chrysler Pacifica

    1 Answer

    Need to replace 1991 chevy astro van break pads and rotors and need a diagram


    The following procedure requires the use of a C-clamp and slip-joint lock pliers.
    1. Siphon off about 2/3 of the brake fluid from the master cylinder reservoirs.

    CAUTION The insertion of thicker replacement pads will push the piston back into its bore and will cause a full master cylinder reservoir to overflow, possibly causing paint damage. In addition to siphoning off fluid, it would be wise to keep the reservoir cover on during pad replacement.

    1. Raise and support the front of the vehicle on jackstands. Remove the wheels.
    When replacing the pads on just one wheel, uneven braking will result; always replace the pads on both wheels.
    1. Install a C-clamp on the caliper so that the frame side of the clamp rests against the back of the caliper and so the screw end rests against the metal part (shoe) of the outboard pad.
    2. Tighten the clamp until the caliper moves enough to bottom the piston in its bore. Remove the clamp.
    3. Remove the 2 Allen head caliper mounting bolts enough to allow the caliper to be pulled off the disc.
    4. Remove the inboard pad and loosen the outboard pad. Place the caliper where it will not strain the brake hose; it would be best to wire it out of the way.
    5. Remove the pad support spring clip from the piston.
    6. Remove the 2 bolt ear sleeves and the 4 rubber bushings from the ears.
    7. Riveted style brake pads should be replaced when they are worn to within 1/32 in. (0.8mm) of the rivet heads; bonded style pads should be replaced when they are worn to no less than 1/32 in. (0.8mm) of the backing plate.
    8. Check the inside of the caliper for leakage and the condition of the piston dust boot.
    To install:
    1. Lubricate the 2 new sleeves and 4 bushings with a silicone spray.
    2. Install the bushings in each caliper ear. Install the 2 sleeves in the 2 inboard ears.
    3. Install the pad support spring clip and the old pad into the center of the piston. You will then push this pad down to get the piston flat against the caliper. This part of the job is a hassle and requires an assistant. While the assistant holds the caliper and loosens the bleeder valve to relieve the pressure, obtain a medium pry bar and try to force the old pad inward, making the piston flush with the caliper surface. When it is flush, close the bleeder valve so that no air gets into the system.
    Make sure that the wear sensor is facing toward the rear of the caliper.
    1. Place the outboard pad in the caliper with its top ears over the caliper ears and the bottom tab engaged in the caliper cutout.
    2. After both pads are installed, lift the caliper and place the bottom edge of the outboard pad on the outer edge of the disc to make sure that there is no clearance between the tab on the bottom of the shoes and the caliper abutment.
    3. Place the caliper over the disc, lining up the hole in the caliper ears with the hole in the mounting bracket. Make sure that the brake hose is not kinked.
    4. Start the caliper-to-mounting bracket bolts through the sleeves in the inboard caliper ears and through the mounting bracket, making sure that the ends of the bolts pass under the retaining ears of the inboard shoe.
    5. Push the mounting bolts through to engage the holes in the outboard shoes and the outboard caliper ears and then threading them into the mounting bracket.
    6. Torque the mounting bolts to 37 ft. lbs. (50 Nm). Pump the brake pedal to seat the linings against the rotors.
    7. Using a pair of slip-joint locking pliers, place them on the notch on the caliper housing, bend the caliper upper ears until no clearance exists between the shoe and the caliper housing.
    8. Install the wheels, lower the vehicle and refill the master cylinder reservoirs with brake fluid. Pump the brake pedal to make sure that it is firm. If it is not, bleed the brakes.

    Oct 11, 2009 | 1991 Chevrolet Astro Extended

    2 Answers

    2001 brake pad replacement 2001 nissan quest


    The hard part is pressing the caliper piston abck into the caliper so you can get the new, thicker pads over the rotor. A large C Clamp works best.

    SECTION 206-03: Front Disc Brake 2001 Villager Workshop Manual
    REMOVAL AND INSTALLATION Pads —Front Disc Brake Removal
    1. Remove the wheel and tire assembly. For additional information, refer to Section 204-04 .
    1. Remove the front disc brake caliper bolts. torx bit. T20?
    1. Support the front disc brake caliper from the front strut and spring assembly using mechanics wire.
    1. Remove the front disc brake pads.
      1. Remove the outboard front disc brake pad.
      1. Remove the inboard front disc brake pad.
    Installation
    1. s1v~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Make sure the master cylinder reservoir does not overfill and spill brake fluid while retracting the front disc brake caliper piston.
      NOTE: It is necessary to fully retract the front disc brake caliper piston in the bore before installing the front disc brake pads.
      Install the front disc brake pads.
      1. Install the inboard front disc brake pad.
      1. Install the outboard front disc brake pad.
    Caution. The outer pads are left and right. put left on driver side.
    1. Position the front disc brake caliper on the front-wheel knuckle and install the brake caliper pin bolts.
    1. s1v~us~en~file=ani_caut.gif~gen~ref.gif WARNING: It is necessary to depress the brake pedal several times to position the front disc brake caliper piston before driving the vehicle.

    Apr 23, 2009 | 2001 Nissan Quest

    1 Answer

    Worn brake pads


    Front brake pad exchange guide.

    Step1 Park the Dodge Durango on a flat surface. Put the emergency brake on and put wedges behind the wheels to prevent the vehicle from rolling. Disconnect the negative battery cable from the battery. Drain 2/3 of the brake fluid from the master cylinder, using a syringe. Remove the wheel and the tire assemblies. Step2 Compress the caliper piston back into the caliper bore using a large C-clamp to drive the piston into the bore. Use additional force if it is required. Using a 3/8 inch hex wrench or socket remove the caliper mounting bolts. Step3 Rotate the caliper rearward off the rotor and out from its mount. Remove the inboard and outboard brake pads. Remove the spring clip that holds the inboard brakes in the caliper. Tilt the pad out at the top to unseat the clip. Remove the retaining spring that secures it in the caliper. Unseat one spring end and rotate the pad out of the caliper. Step4 Suspend the caliper assembly from the Durango frame using mechanic's wire. Do not allow the caliper assembly to dangle from the brake hose as this may damage the brake hose. Step5 Clean the surfaces of the caliper and steering knuckle with a wire brush. Apply multi-mileage grease or similar product. Using brake fluid or break cleaner clean the caliper slide pins. Apply a light coating of silicone grease to the pins. Step6 Install the inboard brake pad and it's spring. Install the outboard brake pad. Install the caliper over the rotor and seat it in its original position until it is flush. Using a torque wrench, torque the slide caliper pins to 22 ft./lbs. Step7 Add brake fluid to the master cylinder. Bleed the brakes. Reconnect the negative battery cable to the battery. Start the engine and pump the brakes 3-4 times to seat the brake pads. Reinstall the wheels. Test drive the Durango at slow to moderate speeds to ensure that the maintenance was performed correctly.
    Rear brake pad exchange.

    Step1 Lift the Durango off the ground with a car jack. Support the vehicle on all sides with jack stands. Keep children and small animals out of the vicinity when you replace the brakes. Step2 Loosen the lug nuts on the wheels with a torque wrench. Remove the wheel and tire assemblies and set them aside, face up, to prevent damage. Step3 Compress the caliper and remove it by lifting the top up and off the caliper adapter. Hang the caliper from the Durango's frame with mechanical wire. Step4 Remove the inboard and outboard brake shoes from the caliper adapter. Take off the top and bottom anti-rattle springs. Keep the springs separated, as they aren't interchangeable. Step5 Press the piston into the bore with a C-clamp. To prevent damage to the pistons, insert an old brake shoe in between the C-clamp and caliper piston. Remove the C-clamp. Step6 Wipe down the caliper mounting adapter and anti-rattle springs with brake cleaner. Grease the anti-rattle springs with brake grease. Install the bottom anti-rattle springs, followed by the top anti-rattle springs. Step7 Install the inboard brake shoes followed by the outboard brake shoes. Replace the caliper and the wheel and tire assemblies. Lower the vehicle to the ground and pump the brakes to seat the pistons.


    Please rate and god bless:)


    Apr 02, 2009 | 1999 Dodge Durango

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