2003 LT Rear Rotor Noise - BMW Luxury Touring Community
 
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post #1 of 22 Old Dec 9th, 2009, 4:19 pm Thread Starter
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2003 LT Rear Rotor Noise

My 03 LT's rear rotor (OEM) makes noise when going over speed bumps, slow speed parking lot riding and when on side stand while engine running. It is like rattling/ vibration noise. EBC Brake pads are around 3mm thick. So it is not time to replace them yet. (My 04 LT does not make that noise at all.) Any ideas on how to fix this rear rotor noise?
Thanks in advance...

Matt Kas

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post #2 of 22 Old Dec 9th, 2009, 5:59 pm
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Re: 2003 LT Rear Rotor Noise

if its a clunk or clank sound then its getting loose and needs replacement or just live with the sound. some have use filler materials to make it less noisy. I ended up having mine replaced with a beer discount.

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post #3 of 22 Old Dec 10th, 2009, 2:23 pm
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Re: 2003 LT Rear Rotor Noise

You have what is called "the cow bell" sound. Replace the rear rotor and pads with the EBC unit. My '08 LT had the "bells" at 8,000 miles.
I was told, yesterday, by my BMW shop that the EBC units are hard to get now. Apparently EBC learned they should have been a higher priced unit.

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post #4 of 22 Old Dec 10th, 2009, 3:29 pm Thread Starter
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Re: 2003 LT Rear Rotor Noise

What kind of filler materials and where?

Quote:
Originally Posted by mwnahas
if its a clunk or clank sound then its getting loose and needs replacement or just live with the sound. some have use filler materials to make it less noisy. I ended up having mine replaced with a beer discount.

Matt Kas

13 Triumph Trophy SE Lunar Silver
12 Suzuki Burgman 650 Executive Pearl White

Laguna Niguel, Southern California (South Orange County)
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post #5 of 22 Old Dec 10th, 2009, 3:30 pm Thread Starter
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Re: 2003 LT Rear Rotor Noise

When replacing the rear rotor do you have to drain the brake liquid?

Quote:
Originally Posted by bblalock
You have what is called "the cow bell" sound. Replace the rear rotor and pads with the EBC unit. My '08 LT had the "bells" at 8,000 miles.
I was told, yesterday, by my BMW shop that the EBC units are hard to get now. Apparently EBC learned they should have been a higher priced unit.

Matt Kas

13 Triumph Trophy SE Lunar Silver
12 Suzuki Burgman 650 Executive Pearl White

Laguna Niguel, Southern California (South Orange County)
"Riding Year around"

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post #6 of 22 Old Dec 10th, 2009, 3:44 pm
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Re: 2003 LT Rear Rotor Noise

Quote:
Originally Posted by MattKas
When replacing the rear rotor do you have to drain the brake liquid?
No just remove the wheel, Unbolt the caliper ( use a piece of wire threw a bolt hole & to the bike to support the caliper) Then remove the 3 bolts on the caliper.

Stevie Shreeve
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post #7 of 22 Old Dec 10th, 2009, 3:46 pm
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Re: 2003 LT Rear Rotor Noise

the bike I have now is also a 03 the older gentleman that I got the bike off of solved this problem with belleville washers some how but I'm not sure how he did it.
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post #8 of 22 Old Dec 10th, 2009, 7:15 pm
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Re: 2003 LT Rear Rotor Noise

Quote:
Originally Posted by MattKas
When replacing the rear rotor do you have to drain the brake liquid?
Search for solutions.
Here is one...
http://www.bmwlt.com/forums/showthre...hlight=cowbell

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post #9 of 22 Old Dec 11th, 2009, 1:28 pm
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Re: 2003 LT Rear Rotor Noise

You've got time before the noise goes from annoyance to a real problem. Matt, call Omar (at MotoGhost). He replaced my rear rotor with the EBC after the old one rattled for an eternity. He's got enough LTs coming through for service he may have one in stock.

Motor On ,/'


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post #10 of 22 Old Dec 11th, 2009, 2:16 pm
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Re: 2003 LT Rear Rotor Noise

I tried RTV between rotor & hub, cutting a radial slot in disc pads, cleaning routinely and the only long term solution was Blue Brake Pad glue as used in auto brakes. I've run this for 3 months & with no noise.
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post #11 of 22 Old Dec 11th, 2009, 5:00 pm
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Re: 2003 LT Rear Rotor Noise

http://www.perfectbrakes.com/products.asp?cat=4624

They have the rear rotor in stock for $157.00. Not only is it quite but you get better brake response.

Wolfgang

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post #12 of 22 Old Dec 11th, 2009, 6:44 pm
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Re: 2003 LT Rear Rotor Noise

I check with some K1200LT forum of Taiwan website,they cut the 15mm washer to insert between nail and disc to fix the problem.

attached the the washer picture.http://www.wilin.com/chinese/08ww.htm
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post #13 of 22 Old Dec 13th, 2009, 8:38 pm Thread Starter
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Re: 2003 LT Rear Rotor Noise

The washer makes sense if it does not drop.

I tried Shoe Goo today. I will see tomorrow if the noise is gone. I did not have to take off the wheel or anything at all. If this does not cure the cow bell, I should probably get an EBC rotor. I am only worried about taking off the ABS linkfrom the original rotor. Maybe I should also order a new ABS link.


Quote:
Originally Posted by fh8932
I check with some K1200LT forum of Taiwan website,they cut the 15mm washer to insert between nail and disc to fix the problem.

attached the the washer picture.http://www.wilin.com/chinese/08ww.htm

Matt Kas

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post #14 of 22 Old Dec 14th, 2009, 8:00 am
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Re: 2003 LT Rear Rotor Noise

Heat the old rotor with a heat gun and the ABS ring will pop right off. Goes back on just as easy. It's a simple job and you'll be amazed at how easy it is. New EBC rotor and brakes will fix you right up. Relax..........

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post #15 of 22 Old Dec 14th, 2009, 2:18 pm
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Wink Re: 2003 LT Rear Rotor Noise

My ABS ring popped right off. Don't bother getting another you will not likely mess it up.

Benton Blalock
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post #16 of 22 Old Dec 15th, 2009, 11:14 pm Thread Starter
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Re: 2003 LT Rear Rotor Noise

Shoe Goo works!!! COW BELL is gone....
I hope this last long time :-)


Quote:
Originally Posted by MattKas
The washer makes sense if it does not drop.

I tried Shoe Goo today. I will see tomorrow if the noise is gone. I did not have to take off the wheel or anything at all. If this does not cure the cow bell, I should probably get an EBC rotor. I am only worried about taking off the ABS linkfrom the original rotor. Maybe I should also order a new ABS link.

Matt Kas

13 Triumph Trophy SE Lunar Silver
12 Suzuki Burgman 650 Executive Pearl White

Laguna Niguel, Southern California (South Orange County)
"Riding Year around"

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post #17 of 22 Old Dec 18th, 2009, 2:33 pm
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Re: 2003 LT Rear Rotor Noise

Not having had this problem, Matt, where did you put the Shoe Goo?

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post #18 of 22 Old Dec 18th, 2009, 4:12 pm Thread Starter
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Re: 2003 LT Rear Rotor Noise

on and around the loose rivets on the rotor.

Quote:
Originally Posted by Lare
Not having had this problem, Matt, where did you put the Shoe Goo?

Matt Kas

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post #19 of 22 Old Dec 18th, 2009, 6:21 pm
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Re: 2003 LT Rear Rotor Noise

I wouldn't expect the goo to last forever. The high temp RTV held for about a year on my '03. I now have the new EBC unit. Not a hassle at all to put on, either.

Quite a difference when you're going down those brick streets in old Amarillo...
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post #20 of 22 Old Dec 19th, 2009, 10:46 am
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Re: 2003 LT Rear Rotor Noise

Quote:
Originally Posted by MattKas
on and around the loose rivets on the rotor.
Actually the rivets being a little loose is a design feature, while beit a poor one in comparison to the EBC. for the floating rear rotor on the LT,

The good centering springs for the rear rotor look like this.




A broken centering spring looks like this:



When you get multipe springs missing next to each other like this you start to get the cowbell effect:


Notice the groove in the rivet to allow the spring to center the rotor in the caliper.

A new EBC rotor with the springs located between the hub and the rotor:



These photos were taken in October when I upgraded to the EBC rotor. About an hours worth of work including yanking/replacing the rear wheel. And in my humble opinion a much more forceful braking capability from the rear than I ever had on the OEM rear rotor.

The stop gap measure everybody is using is just that a stop gap. Over time I believe that the silicone will deteriorate and leave you with the same problem you had before.

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post #21 of 22 Old Dec 19th, 2009, 12:25 pm
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Thumbs up Re: 2003 LT Rear Rotor Noise

Steve, your pics of the rear rotor and the EBC replacement are the best I can recall seeing! Tks for taking the time to post them. In fact, I say they should be part of our HOW for future reference!

John

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post #22 of 22 Old Dec 19th, 2009, 5:16 pm Thread Starter
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Re: 2003 LT Rear Rotor Noise

Thanks for advice and great photos. I will go for EBC rotor as soon as my Shoe Go starts going bad.

Quote:
Originally Posted by Steve_R
Actually the rivets being a little loose is a design feature, while beit a poor one in comparison to the EBC. for the floating rear rotor on the LT,

The good centering springs for the rear rotor look like this.




A broken centering spring looks like this:



When you get multipe springs missing next to each other like this you start to get the cowbell effect:


Notice the groove in the rivet to allow the spring to center the rotor in the caliper.

A new EBC rotor with the springs located between the hub and the rotor:



These photos were taken in October when I upgraded to the EBC rotor. About an hours worth of work including yanking/replacing the rear wheel. And in my humble opinion a much more forceful braking capability from the rear than I ever had on the OEM rear rotor.

The stop gap measure everybody is using is just that a stop gap. Over time I believe that the silicone will deteriorate and leave you with the same problem you had before.

<on soapbox> I've been in the computer business for 30 years worked on everything from the CPUs to the peripherals and my motto has been "Fix it right the first time." It's not failed me yet and I don't believe it will fail me now. <off soapbox>

Matt Kas

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12 Suzuki Burgman 650 Executive Pearl White

Laguna Niguel, Southern California (South Orange County)
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