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#1 14-03-06 07:28:00

danbrown
Member
Registered: 31-01-06
Posts: 20

brakes squeeling realy badly

Hi, the brakes on my 1999 1.8 astra have delevoped a realy bad squeel aparently from all 4 wheels, thought it was handbrake to start with so i adjusted that but it seemed to tighten itself again, is this possible.

anyway, it only does it when they get hot,(after about 2 hours driving) had a feel of the wheels after it had been doing it and both the off side were warm and one near side was slightly warm and the other cold, also the fluid level is too high, could that be it.

FYI all new disks and pads, didnt do it before i changed them all

Help please, thanks

Dan

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14-03-06 07:28:00

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Re: brakes squeeling realy badly



#2 14-03-06 08:30:08

Graham
Guest

Re: brakes squeeling realy badly

The squeal is caused by the pads moving slightly in the caliper.

You will need to take off the pads and apply some grease to the backs of the pads (NOT the friction side!) and then replace them. The grease can be bought from Halfords or similar.

Some free advice. The above procedure is standard. If you're not sure about any aspect of car maintenance, then leave well alone or at least get some professional advice before leaping in. Especially with such important items such as brakes!

Only attempt these things so you're sure you won't cause danger to yourself and others.

Which you have done in this instance.


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#3 14-03-06 08:57:29

Mmm
Member
From: W Sussex
Registered: 08-04-05
Posts: 262

Re: brakes squeeling realy badly

You will need to take off the pads and apply some grease to the backs of the pads (NOT the friction side!) and then replace them. The grease can be bought from Halfords or similar.


!!!!!!!!!!!!!!!!!!!!!!!!!
Please note that you should use copper grease not ordinary grease if youre going to do this!
!!!!!!!!!!!!!!!!!!!!!!!!!

It might also help to fit anti-squeal shims, did you do this? Did you remove the protective coating from the discs and did you glaze-bust the rear drums?
Also worth emptying a can of brake cleaner on them to get rid of any dust that has built up during running-in.

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#4 14-03-06 09:02:30

danbrown
Member
Registered: 31-01-06
Posts: 20

Re: brakes squeeling realy badly

I did grease them when i changed all the disks and pads, however someone has suggested that i removed the casting marks off the tangs on the brake ligners to ensure that they run free, thanks for not being too patranising,

Some free advice. The above procedure is standard. If you're not sure about any aspect of car maintenance, then leave well alone or at least get some professional advice before leaping in. Especially with such important items such as brakes!

Only attempt these things so you're sure you won't cause danger to yourself and others.

not just jumping in, have been working on cars for years and am a qualified test engineering fitter at a large engineering company.

I am comfortable in the fact that no danger has come to anyone as the problem has been found early and is being rectified before the vehicle is going back on the road

thankyou for your fast response

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#5 14-03-06 09:06:35

danbrown
Member
Registered: 31-01-06
Posts: 20

Re: brakes squeeling realy badly

]

i used copper grease, i didnt fit any shims as there was none there and no mention of that on the vauxhall service cd, it has disks on the back too, i assume the shims would sit between the piston and the pad or is that rong

thanks

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#6 14-03-06 13:36:20

danbrown
Member
Registered: 31-01-06
Posts: 20

Re: brakes squeeling realy badly

So what you are saying is that if you need advice go to a professional, that would lead to a very quite message board now wouldn't it. I followd instructions to do the job in hand the job was done exaclty as instructed and a problem has arrisen which i am trying to rectify, so thankyou for your input but take a check on the attitude to avoid offending people!!

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#7 14-03-06 14:14:59

Andi
Member
Registered: 21-10-05
Posts: 1,382

Re: brakes squeeling realy badly

Hi...

I believe it takes about 200 miles plus to actually wear new brakes/discs in (i was told this by Vauxhall masterfit, and displayed your exact same problems). Brake with caution and in plenty of time untill it gets better.
If you have any doubt though, get a free brake check at Kwikfit or equivalent!

Graham....please keep your postings polite, personal insults/digs, no matter how delicate are not acceptable..

thanks

Andi


1.gif

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#8 14-03-06 19:06:37

Automan
Verified Member
From: West Yorkshire
Registered: 07-11-05
Posts: 36
Website

Re: brakes squeeling realy badly

Hi Dan Brown,

I’m slightly worried that you say three of the wheels are becoming hot and one is staying cool. This is usually due to the friction pads slightly binding, which can be a common problem if the pads and brake fluid have not been changed for a long time. What you need to do is jack each wheel up in turn and check the wheel rotates freely with very little resistance. If there is excess resistance with the front wheels then the piston and cylinder might have slight pitting thus not fully releasing a grip of the disc. If the back wheels have excessive resistance then the piston/s may not have been fully screwed back into the helix. If you wind the piston in too fare it will self adjust up.

If the brake fluid hasn’t been changed in the last two years then I would advise changing it. As you are an engineer I’m sure I’m not telling you anything new but I’ll mention it anyway, Brake fluid is hygroscopic which means it absorbs atmospheric moisture, which is why the fluid can boil at relatively low temperatures. This will reduce brake performance and be responsible for corrosion. The problems this can cause are hard, perished or broken piston seals and dust covers also resulting in corroded, pitted pistons and calliper bore.

For your model the Brake fluid should be SEA j1703, dot 4 (Duckhams universal brake and clutch fluid).

If you take on changing the fluid your self then you need to know that it is risky when bleeding the brake system by pumping the brake pedal. I’ll explain, if the brake foot pedal is pressed all the way to the floor then upon releasing the brake the seal on the master cylinder can flip over thus rendering the brake system useless with a potentially expensive repair job.
So either use short pumps of the brake pedal when bleeding the system to change the brake fluid or better still pressure bleed the system.

I think it’s excessive heat that is the cause of the brakes squeeling.   roll

I hope I’ve explained that well enough.

Take care,

Automan.



NB  Typo amended for you as shown in red !

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#9 14-03-06 19:15:46

luchell
Guest

Re: brakes squeeling realy badly

Once again thankyou Automan.

#10 16-03-06 08:40:48

danbrown
Member
Registered: 31-01-06
Posts: 20

Re: brakes squeeling realy badly

thanks for all your help, you were spot on with the brakes binding, all 4 pads on the back had seized in the guides so removed, cleaned up to run free and plenty of grease on that sorted the back,

1 pad on the front had seized and 2 were tight so same treatment and all is good now.

havent blead the system yet but shall in the near future, thanks for the advice regards to pushing the pedal all the way.

again, all is good now, thanks all

Dan

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