Brake Squeal? - BMW Luxury Touring Community
 
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post #1 of 16 Old Feb 16th, 2009, 8:41 am Thread Starter
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Brake Squeal?

Folks. My new to me 2001 has an absolutely horrendous screech when the rear brake is applied. Funny thing is, it's dead quiet when the brakes are applied only at the front lever. I thought these were linked brakes, so the rear gets applied along with the front when the front brake is applied. But it is dead quiet using the front brake lever and ear splitting when the brake is applied at the foot pedal.

I removed the rear brake pads, cleaned and lubed the pins and the back of the pads, but that made only a marginal difference.

Any help out there?

Thanks.
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post #2 of 16 Old Feb 16th, 2009, 9:52 am
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Re: Brake Squeal?

Quite common. Use of rear pedal and hand leaver put different amounts of pressure on the pads.
One solution is to use EBC FA244HH sintered pads and modify them as detailed HERE

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post #3 of 16 Old Feb 16th, 2009, 9:52 am
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Re: Brake Squeal?

My 06 was not as bad as you describe but the fix was replacing the disc from a floating 12 stud to a 5 stud which was done under warranty. I am not sure why this would not work for you but I would bet that others will pipe in to share their solutions.

Mugz

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post #4 of 16 Old Feb 16th, 2009, 12:52 pm Thread Starter
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Re: Brake Squeal?

Thanks! Just ordered a set of the EBC's and I'll let you all know how it works out.
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post #5 of 16 Old Feb 16th, 2009, 3:05 pm
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Re: Brake Squeal?

Quote:
Originally Posted by steveboutilier
Thanks! Just ordered a set of the EBC's and I'll let you all know how it works out.
My 2000 LT did the same thing. I put the "Premium BMW Pads" on and the noise went away. I'm on my 3rd set now with no noise ever.

Stevie Shreeve
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post #6 of 16 Old Feb 16th, 2009, 3:37 pm
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Re: Brake Squeal?

Come on...no one has said it yet? "Loud brakes save lives!"

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post #7 of 16 Old Feb 16th, 2009, 6:40 pm
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Re: Brake Squeal?

Quote:
Originally Posted by ibbones
Come on...no one has said it yet? "Loud brakes save lives!"
You want them to hear you BEFORE you have to apply your brakes but now you're talking Harley so that is no solution! On the otherhand, you can always turn up your radio speakers.

I SAY, TURN UP YOUR RADIO. 8Amazing what we have to do as we get older.

10Mugszy

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post #8 of 16 Old Feb 18th, 2009, 3:52 am
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Talking Re: Brake Squeal?

G'day everyone,

I have a 2001 LT and when I first got it I had the usual (same as everyone else) brake squeal and replaced the pads with EBC (same as everyone else). That worked perfectly.

Recently a set of EBC just wore out and needed to be replaced.

I looked closely at the nearly new original BMW pads. I decided that the squealing noise can only be caused by the pad dust dragging across the face of the rotor. So I made a vertical cut with a hack saw blade down the centre of the face of the pad through the pad material until the blade touched the backing plate to remove the dust from the rotor as it was produced. I have now done about 10,000Km with the modified pad and guess what - no squealing.

For what its worth. Cheers.

Shane,
Bright,
Australia

2001 K1200LT Metallic Mauve - Merlot. (Deceased)
2003 Ducati 999 Testastretta, Red (of course) - Demos.
2005 Cagiva Xtra Raptor 1000, Bat Black - Rex.
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post #9 of 16 Old Feb 18th, 2009, 2:22 pm
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Oz Brake Squeal Solution

If that turns out to be the best solution, this needs advertising a bit more

Quote:
Originally Posted by shalei
G'day everyone,

I have a 2001 LT and when I first got it I had the usual (same as everyone else) brake squeal and replaced the pads with EBC (same as everyone else). That worked perfectly.

Recently a set of EBC just wore out and needed to be replaced.

I looked closely at the nearly new original BMW pads. I decided that the squealing noise can only be caused by the pad dust dragging across the face of the rotor. So I made a vertical cut with a hack saw blade down the centre of the face of the pad through the pad material until the blade touched the backing plate to remove the dust from the rotor as it was produced. I have now done about 10,000Km with the modified pad and guess what - no squealing.

For what its worth. Cheers.

"Whenever you find you are on the side of the majority, it is time to pause and reflect" Mark Twain


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post #10 of 16 Old Feb 18th, 2009, 6:08 pm
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Re: Brake Squeal?

Quote:
Originally Posted by Mugszy
My 06 was not as bad as you describe but the fix was replacing the disc from a floating 12 stud to a 5 stud which was done under warranty. I am not sure why this would not work for you but I would bet that others will pipe in to share their solutions.

Mugz
I plan on doing this when the weather warms up a bit. Figure I'll have the dealer put on a new front tire at the same time so they at least are getting some cash from me while the bike is there (although I do have a $100 dollar gift card from this dealer, so it won't be quite as much).

Tony

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post #11 of 16 Old Feb 19th, 2009, 9:22 pm Thread Starter
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Re: Brake Squeal?

That vertical cut down the center of the pad... is that relative to the way the pad sits on the bike, or in the palm of your hand? I guess a better way of saying that would be, was that along the long edge, or the short?
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post #12 of 16 Old Feb 23rd, 2009, 3:50 am
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Re: Brake Squeal?

I made the cut vertical as it sits in the caliper i.e. the short way.

Shane,
Bright,
Australia

2001 K1200LT Metallic Mauve - Merlot. (Deceased)
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post #13 of 16 Old Feb 23rd, 2009, 3:55 am
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Re: Brake Squeal?

I guess a better way to describe it is imagine a line directly out from the centre of the hub (or axle) though the centre of the pad. Then cut along that line through the pad material to the backing plate.

cheers

Shane

Shane,
Bright,
Australia

2001 K1200LT Metallic Mauve - Merlot. (Deceased)
2003 Ducati 999 Testastretta, Red (of course) - Demos.
2005 Cagiva Xtra Raptor 1000, Bat Black - Rex.
2006 Cagiva Raptor 650, Red - Gina (sold)
Bike Trailer for Merlot - Cabernet.
2007 Ducati 1098S Tricolore
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post #14 of 16 Old May 11th, 2009, 4:56 pm
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Re: Brake Squeal?

Thanks for that tip Shane. I have a 00LT and both front and rear squeal but the fronts more than the rears. I replaced the breaks last summer and have to listen to the squealing each time I stop. I will try your suggestion next weekend and let the forum know how it turns out.

Thanks again!

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post #15 of 16 Old May 11th, 2009, 8:25 pm
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Re: Brake Squeal?

Like the sound of that solution from Shane down under.
Some hard to sneak up on my buddies on the Goldwings at the stop lights this way ....
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post #16 of 16 Old May 12th, 2009, 10:16 am
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Re: Brake Squeal?

With the LTs there is the issue of the defective rear rotor which I imagine contributes to many of these brake noise issues, particularly the "cowbell effect". However typical brake squeal normally is a secondary noise caused by the pad backing vibrating against the piston or on an LT the pucks. There are several products available to apply between the two surfaces to eliminate the noise. I use never seize compound applied to the piston face.


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