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I've developed a rear (drum) brake squeal on my 02 Zafira . Have taken the drum off and given everything it a good clean , but it persists. The shoe surfaces looked a bit shiny, could this be the cause - is it OK to rough up the surface with sandpaper? - I assume it's all asbestos free these days.
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I assume you know it is the rears becuase you can make the noise using the hand brake ye. If it is really the rears then degaze the metal surface of the drum and the brake shoes and do both sides. Regards Peter
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>>The shoe surfaces looked a bit shiny...
I've just spent some time deglazing the rear shoes on our '53 Astra. The symptom in our case was a grating noise on the first few brake applications after setting off.
Our car has done 34,000 miles, and the rear brakes were in tip-top condition - apart from the glazed surface of the shoes.
So, I stripped the brakes down, deglazed the shoes and drums with some aluminium oxide paper, cleaned and reassembled with some copperslip on all the metal to metal contact points, and adjusted the brakes up (Vauxhall self adjusters come quite close to breaking the trades descriptions act!)
So far, so good. I don't know if anything had got in and contaminated the rear brakes (we bought the car at 10,000 miles), but the appearance of the shoes was a surprise to me.
Number_Cruncher
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i agree deglace the shoes and i do the drums as well and then clean off with brake cleaner and a coating of coppaslip, but dont go mad with it,no idea on how the hub is held on with this model but if it is still a split pin do use a new one.
--
\"a little man in a big world/\"
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Thanks for the advice, I'll give both sides a quick buff when it stops raining.
Sounds exactly like my problem, same mileage and probably the same brake assembly as mine. Plenty of life left in the shoes too.
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If the shoes don't already have a chamfered edge at each end of the shoe, then file some on them. This will help shoes from sticking if left for long periods.
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my xreg astra was doing this but i cleaned up the shoes still the same, i backed off the adjuster a bit these cars seem to over adjust no problems since!!
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if you back of the adjusters and rebuild the drums up then the adjusters should reajust up again if everything is tickaty boo.
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\"a little man in a big world/\"
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