Scraping noise from rear

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Altrezia
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Post Tue Apr 22, 2014 12:28 pm

Hi guys,

I have a scraping noise coming from the rear of my car - and annoyingly I have just noticed it before I have to drive for 3 hours!

It's the exact noise that a disc-brake backing plate makes when scraping on something.. but I have drums on the rear.

Any ideas what I should check before setting off?

-a
jimmyspeed
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Post Tue Apr 22, 2014 12:35 pm

the inside of the disc where all the handbrake mechanism is , and look for stones outside
Altrezia
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Post Tue Apr 22, 2014 12:39 pm

Can you get at that without removing the whole drum assy?
jimmyspeed
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Post Tue Apr 22, 2014 12:42 pm

edit just clicked - you have drums

still looks like one allen bolt to remove and the same for the handbrake adjustment,. through the small viewing hole

my bets a stone
Last edited by jimmyspeed on Tue Apr 22, 2014 1:09 pm, edited 1 time in total.
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PeteE30Tourer
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Post Tue Apr 22, 2014 12:56 pm

This sounds like a very similar noise to what I'm experiencing here: http://www.e30zone.net/modules.php?name ... c&t=250260 Number 2.

I hope to get the back end up in the air one evening this week to work out what's going on.
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Back behind an M20, but now I can hear it better.
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PeteE30Tourer
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Post Tue Apr 22, 2014 12:57 pm

Forgot to mention I'm on discs. Keep us posted on what you find and I'll do likewise.
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Altrezia
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Post Tue Apr 22, 2014 1:33 pm

Just took my rear drums apart and found that one of the shoes was scraping it's edge on the inner face of the drum.
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Brianmoooore
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Post Tue Apr 22, 2014 1:40 pm

Altrezia wrote:Just took my rear drums apart and found that one of the shoes was scraping it's edge on the inner face of the drum.
Presumably because the securing pins have gone missing?
If the cause is a rusted backplate, then the same kind of repair should be possible as detailed in the wiki for the handbrake mechanism on rear disc brakes.
Altrezia
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Post Wed Apr 30, 2014 11:04 pm

No the pins were still there. No idea why it was touching, and I still have a scraping noise even after grinding a bit of the shoe away, but less loud :/
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Brianmoooore
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Post Wed Apr 30, 2014 11:08 pm

Shoes should be hard against the backplate, so how can they touch the drum? Warped backplate? Wrong (wider) shoes fitted?
Altrezia
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Post Thu May 01, 2014 9:53 am

Wrong shoes I'll guess.

They were hard against the back plate, and the back plate looked fine.

Will be swapping to discs at some point so not putting too much thought into it winkeye
votivequagmire
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Post Thu May 01, 2014 2:13 pm

If they were the wrong shoes then surely both sides would have the same symptoms and it would have started a long time ago rather than just recently?

:?:
'88 325i M20, could've done with a sunroof.