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Old 27th September 2012, 10:26 PM   #21 (permalink)
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This is a good read of how a worn wheel bearing can cause "pad knockback" or deflection of the hub/rotor during cornering that will actually push the caliper pistons (and pads) back into the caliper away from the rotor.

I'm wondering if an off-flush contact of the pad to the rotor may be the noise you're hearing and a fresh bearing may cure it. Here's to hoping!

Pad Knockback
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Old 28th September 2012, 01:35 AM   #22 (permalink)
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Quote:
Originally Posted by BIGALR33 View Post
This leaves me with the conclusion that the hub is perhaps not completely square to the disc
Best get a DTI onto that hub then and see if you have any runout aye..
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Old 28th September 2012, 10:41 AM   #23 (permalink)
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Yeah, done that, run out on the outer diameter of the disc is 0.025mm. I was thinking more the relationship between the caliper mounting and the squareness of this compared to the disc face
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Old 29th September 2012, 09:47 AM   #24 (permalink)
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Boom! And the dirt is gone...
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Old 29th September 2012, 06:47 PM   #25 (permalink)
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and what about the squeal ??

Following this one with angst !!..
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Old 30th September 2012, 04:10 PM   #26 (permalink)
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Ha, yes, that was what I was saying.. Can finally move on with other jobs I want to do now. I was getting worried for a bit, having spent money on a remap and other bits, didn't want to end up with a car that I had to sell and waste the money I had spent. I have a spare set of slotted discs and front calipers, I'll post them in the for sale section at somepoint, if anyone's interested in the meantime, pm me.
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Old 30th September 2012, 08:23 PM   #27 (permalink)
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Great thread, mine squeals so bad that im using the E brake a bit at traffic lights so i dont look like a buffoon.
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Old 30th September 2012, 08:56 PM   #28 (permalink)
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So what was causing the noise???
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Old 1st October 2012, 06:29 AM   #29 (permalink)
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I was doing the same, combination of handbrake and brakes to try and stop at the lights. My handbrake started a squeal of its own after a while though!

So what was the cause in the end? Quite embarrassingly, it was the rear brake. Incorrect fitment of one of the brake springs. The previous owner had reshaped it to fit at 90 degrees to what it should be. I changed the pads earlier this year and didn't notice, probably just whacked it back it in the way it came out. - I feel like such a tool shed. But on the other hand, I have nice new brakes, adjustable camber bushes and a new ball joints so all is well.

The thing is, is I could've sworn it was the front brake. I even asked the opinion of other passengers and it sounded like it was without a shadow of a doubt, coming from the front. I booked the car into a well known 'specialist' a while back and they, nor another garage it went to, could find the problem either... So if you have a similar problem, don't let your ears mislead you and check front and rear!!
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Old 1st October 2012, 04:20 PM   #30 (permalink)
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So, it turns out that although under normal use all seems well. However under really heavy braking it still squeals like a piggy. Here we go again.....
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