Toyota corolla 2003 brake problems

[Stevomkd]

Hello i have 2003 corolla 1.4 vvti and i have problems with the brakes. From the right front brake there is sound like scraping/cracking when i brake, i bought the car few months ago and the previous owner gave me "old" rotors so I resurfaced them bought new brake pads new shims and the sound didn't came 1-2 days after that it started again and it wraps the rotors. If some of you guys had this some help is thankfull. Cheers

[oldcodger]

Hi,

Assume you have fitted the resurfaced rotors and new pads to Both front wheels ?  You are aware there is a minimum thickness to the rotors ?

Did you use any Copper grease or better still a compound like CeraTec on the back of the pads and shims?

Have you checked and cleaned/lubricated the caliper slider bolts, they are often seized if not properly serviced and with them being different you need to replace them in the correct order.

 

 

 

 

[Stevomkd]

Thank you for the reply. Yes I am aware of minimum thickness and the rotors are 24mm, I fitted new slider bolts for my caliper with new grease, unfortunately I could not find Copper grease in my town. I asked if the previous owner had this issue and he told me "check the cylinder on the caliper". I've been to two mechanic shops and the said it is maybe the bearing.  

[oldcodger]

Hi,

Some brake pads are fitted with a metal pointer that create a screeching sound when the pads wear low , could that catching on something and creating the noise?

Also getting the slider pins the wrong way around can cause wierd problems, assume yours had a rubber end to one of the bolts.

The calipers do not have any Bearings, just a piston and rubber seals, however replacing them incorrectly can be very dangerous, often better get your refurbished or exchanged calipers, though not cheap.

If  the pad wear is roughly even on both front wheels then it kind of suggests the pistons are both moving ok.

What can you find if you jack the front end up, rotate the wheel by hand as someone lightly presses the brake pedal, can you then 'see' the problem ?

 

[Stevomkd]

2 minutes ago, oldcodger said:

Hi,

Some brake pads are fitted with a metal pointer that create a screeching sound when the pads wear low , could that catching on something and creating the noise?

Also getting the slider pins the wrong way around can cause wierd problems, assume yours had a rubber end to one of the bolts.

The calipers do not have any Bearings, just a piston and rubber seals, however replacing them incorrectly can be very dangerous, often better get your refurbished or exchanged calipers, though not cheap.

If  the pad wear is roughly even on both front wheels then it kind of suggests the pistons are both moving ok.

What can you find if you jack the front end up, rotate the wheel by hand as someone lightly presses the brake pedal, can you then 'see' the problem ?

 

Hello,

The pads are pretty new it's not the sound of worn pad screeching it is like cracking\scraping metal, I put the slider pins as they were before it started  making sounds. For the bearings I taught for the hub bearing. I have the problem with refurbishing or even finding used parts for toyota in my country. I've jacket the car up and did the same procedure but nothing came up only when the car is on the ground.

[Stevomkd]

[oldcodger]

Hi,

Hard to say then what the problem is, its not a common one one, not something like the brake dust shield rattling about ?   they can rust away easily.

When you say a cracking sound, that could be more the force of braking affecting some suspension part, like the strut or its top mount bearing /rubber ?

Perhaps you could record the noise on your phone and post it up, someone else might know what its likely to be, ahh - you just have ! but sadly it does not play ??

Bit surprised you do not have many Corollas in your country  ??

 

 

[oldcodger]

Hi,

The video now plays ok, but not much of a noise, though thinking it may be the ABS unit  or even the brake servo ?

[Stevomkd]

Not many older corollas but newer toyotas now are booming. Did you hear that craking sound. But cant be suspension related because it warps my rotor

 

[oldcodger]

Hi,

Can hear some noises on the video, but nothing thats very loud or comes across as a problem.

Can we just confirm what you are saying " it Warps my Rotor"      - something is literally bending the rotor ? ( brake discs as we call them here in the uk).

They are one solid piece of metal, no idea what could damage them like that, though are you talking after several thousand kilo meters of driving and heavy braking  ??

[Stevomkd]

21 hours ago, oldcodger said:

Hi,

Can hear some noises on the video, but nothing thats very loud or comes across as a problem.

Can we just confirm what you are saying " it Warps my Rotor"      - something is literally bending the rotor ? ( brake discs as we call them here in the uk).

They are one solid piece of metal, no idea what could damage them like that, though are you talking after several thousand kilo meters of driving and heavy braking  ??

I could not capture the sound on camera but it sounds loud. It bends the discs , i know if they are overheated it can bend them but I did 4-5000 km on them not heavy braking could not find the problem

 

[oldcodger]

Hi,

If the pistons were seizing on that would create the heat, but would expect the brake pads to have been worn down quickly and the steering to pull to that side , which you have not said, so assume its not happening  ?

After a good run, if you  carefully put your hand on the center of the wheels they will feel warm to hot, but if the pads are binding  on the RH side it would feel a lot hotter.

Assume the piston is not siezed as you will have to had to push the piston back to allow fitting of new pads ?

One thing that we have read about is if the  flexible hose that connects to the caliper fails internally so  it can act like a one way valve, when you release your foot of the brake pedal, the fluid cannot return from the piston, so  holding the pads on. Expect it can very slowly return , so appears normal when you check thing out ?

Otherwise no idea what could be generating such heat to distort the rotor ?

[Stevomkd]

21 hours ago, oldcodger said:

Hi,

If the pistons were seizing on that would create the heat, but would expect the brake pads to have been worn down quickly and the steering to pull to that side , which you have not said, so assume its not happening  ?

After a good run, if you  carefully put your hand on the center of the wheels they will feel warm to hot, but if the pads are binding  on the RH side it would feel a lot hotter.

Assume the piston is not siezed as you will have to had to push the piston back to allow fitting of new pads ?

One thing that we have read about is if the  flexible hose that connects to the caliper fails internally so  it can act like a one way valve, when you release your foot of the brake pedal, the fluid cannot return from the piston, so  holding the pads on. Expect it can very slowly return , so appears normal when you check thing out ?

Otherwise no idea what could be generating such heat to distort the rotor ?

it makes sense for the brake line, as I said I changed the pads and I did return the cylinder back so no logic for that to be the issue. I will check the line or better buy new one.

[Stevomkd]

Still can not find the problem

[Stevomkd]

After detailed inspection of the brake I found that inside brake pad is lot worn on one corner than the other now I am pretty sure that is the brake caliper 

 

[oldcodger]

1 hour ago, Stevomkd said:

After detailed inspection of the brake I found that inside brake pad is lot worn on one corner than the other now I am pretty sure that is the brake caliper 

 

Think you are describing what thye call Tapered wear, so it still sounds like a fitting problem.

Are your slider pins fitted  as shown in the earlier picture above,   on both wheels ?

When I  got them the wrong way it caused uneven wear, though was hard to find any info on which way round they should be until a good mechanic told me.

If your pins are the wrong way , you will need new pads fitting to be safe.

 

[Stevomkd]

On 8/18/2021 at 1:12 AM, oldcodger said:

Think you are describing what thye call Tapered wear, so it still sounds like a fitting problem.

Are your slider pins fitted  as shown in the earlier picture above,   on both wheels ?

When I  got them the wrong way it caused uneven wear, though was hard to find any info on which way round they should be until a good mechanic told me.

If your pins are the wrong way , you will need new pads fitting to be safe.

 

Slider pins are fitted in correct order the sound I expirience and rotor warp I am 99.99% sure that the caliper is not working correctly   

[oldcodger]

Hard to say what the  problem really is remotely.

Sounds like you are convinced its the calipers so you need to find a good price for a Pair of new or refurbished calipers in your country, though not cheap!

Be sure to check on what make they are, they could be Lucas/TRW or Asin, usually stamped as such somewhere on the outside of the caliper body.