Help! Defender Brake Squeal. Going Insane!

[skip]

I need help bad.
300tdi Defender with rear brake squeal. It squeals on braking. A really really gentle stop keeps it quiet but any firmer away she goes. I thought it was the WELL WORN (185k) rear discs so I replaced the lot. Gen pads, new discs. Still squealing.
Spoke to a local brake specialist and he suggested putting some Loctite Anti-seizing compound between the pad back and the steel shim plate. That did work once but a long time ago. Not this time but.
Any ideas troops.
Its driving me nuts.

Skip

[p38arover]

Did you chamfer the leading edge of the pads?

Ron

[RoverOne]

Originally posted by p38arover
Did you chamfer the leading edge of the pads?

Ron

Agree with Ron, although most brake pads should already be chamfered. Could take existing ones out of calipers and deglaze with some emery paper can work, also could just be dust between pad and disc.

I once dropped a new set in and eliminated squeal, turned out to be just compound difference didn't suit the Defender on that set of pads, never happened again.

Cheers
Bryce

[crossy]

i have just used CRC stop squeek for the same problem. Mechanic in a can stuff. worked beautifully on the series drum brakes, 100% recomend it. $15.00 a can, money well spent.

[siegucci]

Skip
With new pads and rotors there shouldn't be any need to chamfer the edges because the discs don't have lips. Did you by the parts from a dealer?
I ask this because LR introduced upgraded rotors a while ago to get rid of the brake squeal.

[Shifter]

Get a hose on em and wash em out, cheap and works every time!

[p38arover]

New pads I bought recently had a very heavy 45 deg chamfer on them.

Ron

[cols110]

One of our club members had this problem as well a couple of weeks ago, and the solution was to fit the latest spec TD5 pads, he spoke to his local LR stealer and that was their advice, thats how they overcome the problem.

[DEFENDERZOOK]

<span style="color:blue">did you have shims on the pads....?



did you fit the shims the right way around......that is with the "D" down....?

if yes and they are still sqealing.....
make sure they are chamfered and deglazed and cut a groove down the centre of the friction material (with a hacksaw)......


i have done plenty in my time......
its a common problem.....</span>

[Reads90]

did you but chaep pads, as they do this alot.
Or the old faith full the stone betwwen the disc and pads

[DEFENDERZOOK]

<span style="color:blue">we used to only use genuine pads and they used to squeal all the time.....</span>

[Reads90]

[quote=DEFENDERZOOK]<span style="color:blue">we used to only use genuine pads and they used to squeal all the time.....</span>

as i mean't ,good quality pads style_emoticons/<#EMO_DIR#>/laugh.gif style_emoticons/<#EMO_DIR#>/laugh.gif

i tend to use EBC pads

[skip]

What a great response. Thanks guys.

Genuine pads, actually even had one set replaced for free because of the squeal. 2nd set still squeal.

New genuine discs.
Tried the CRC spray can stuff, no good.
Tried the hose out, no good.
tried the CRC orange Goo stuff between the pad and shim, no good.
Pads in correctly,
Huge 45deg chamfer on leading edge of new pads as standard.
Might need to try EBC or similar brand pads.
Will chamfer the end of the pad as well.

We will get there brothers!!

Skip

[DEFENDERZOOK]

<span style="color:blue">where abouts are you...?</span>

[disconut]

Extreme fix that worked on my old Jap bikes years ago when Stainless discs caused squealing.

Drill a series of pencil lead size dia holes (leads should press in neatly), diagonally across the pad. 5 or 6 per pad will be plently. Insert the pencil leads, sand flush and refit the pads. This releases a small amount of graphite onto the disc under braking. Worked back then. Worth a try. Sounds like you have plenty of pads to play with.

Trev.

[p38arover]

A few years back a rep from Disc Brakes Australia came to an LROC meeting. He was asked baout brake squeal. His response was that they don't really know what causes it and how to eliminate it.

Ron

[disconut]

I read somewhere that harmonics from the disc during braking cause the squeal. :?
If they don't know, it must be good luck to get a non squealing vehicle! 8O

So far so good with mine. 41 K's only though. It could be the metallurgy used in the disc design.

Trev.

[weeds]

As defenderzook said re: shim

I had a leaking rear caliper the other month, when I pulled it apart I though it was strage the way the shim was designed as the D was cut out from memory does not allow the piston to push square on the pad. With the piston pushing at an angle it chopped out the piston seals and rubbed all the chrome of the piston. When I picked up the new bits from MR Automotive I asked if I could throw the shim away so the the piston would sit square, they inidated that if I was to do that the brakes would squeel.

I was at MR Automotive the other day and they were having a bit of trouble stopping squeeling brakes on a 130 after fitting new pads. Maybe try a differant set of pads or hold your foot on the brake a little bit while driving for a few hundred meters.

[disconut]

Article link on this subject.

http://www.canadiandriver.com/articles/jk/...k/at_000829.htm (http://www.canadiandriver.com/articles/jk/at_000829.htm)

Cheers.

[disconut]

From Google "Brake Squeal"

Ten reasons brakes squeal

by Rob Forte posted August 17, 2004


When it comes to instilling unrelenting embarrassment upon car drivers and mechanics alike, nothing comes close to the shrill screeching of brakes. It is the number one comeback complaint related to brake service and the one that mechanics know the most about.

We drivers know that when we hear our brakes squeak it is time to have them looked at and possibly replaced. If you are experiencing a repeated problem with your braking system that results in a squeak or squeal, then have a look at these ten examples on why our brakes squeak:

1. Low quality brake parts. Friction compounds are a well-guarded secret in the industry and each manufacturer has spent years refining the process to achieve the best performance results.
2. Rust accumulation on drums and rotors. When the brakes of a car are not used for a while, rust forms on the braking surface of both rotors and drums. Apply the brakes lightly during for the first few feet of driving to remove any rust build-up. Noise from surface rust should subside after a few minutes.
3. New brakes not properly burnished. Burnishing the brakes should be done by your repairer and requires a repeated application of the brakes in a prescribed manner that mates the surface of the brake material to the drum or disc.
4. Brake-liners not beveled. Choose a brand of brake lining that incorporates beveling at the leading and trailing edge of the brake lining to avoid squeaks.
5. Improper upkeep. Follow all of the required steps as directed by the brake parts manufacturer, including using any included adhesives or lubricants supplied.
6. Heat build-up. Slight squeaking after repeated, hard-braking application without ample cooling time for the brakes is normal.
7. Restricted airflow around the brake assembly. Replace any broken or missing ductwork that directs air to the brakes. Choose aftermarket rims that allow air to flow through the brake assembly. Most of today's brand names have designs that increase airflow around the brakes.
8. Worn components. Replace any worn parts such as calipers, sliders, bushings, anti-rattle clips, rotors or drums to reduce the likelihood of noise. Rust and wear are the most common cause of brake squeals.
9. Missing spacer shims behind pads. Some manufacturers include this shim as part of their installation hardware. Be sure to include these shims when replacing the brake pads.
10. Improper clearances between part surfaces. For persistent noise, check for assembly clearances that may cause high frequency vibration. Close proximity between part surfaces may cause noise during brake application, be sure to apply the compound included with the parts to these areas.

If you are still experience squealing after addressing any of the above possibilities, you may consider taking the vehicle to a brake specialist or to a dealership from your vehicle's make for a more comprehensive diagnostic inspection.

[DEFENDERZOOK]

<span style="color:blue">another killer of brake pads is mag wheel cleaner......
some of these are just some type of acid......


they are designed to eat away brake dust.....they will also eat at the brake pads....



as to the price of pads....we were only fitting genuine land rover pads...
not cheaper alternatives....and they still used to squeal.....</span>


<span style="color:darkred">(you could also hook up a couple of windscreen washer jets and washer bottle aimed at the brake pads with the control switch connected the the brake light switch.......then fill the washer bottle with WD40 or equivalent.....)</span>

[sclarke]

My 30c

Has anyone ever heard Volvo Brakes.... They Squeel like School Girl at Schoolies

To fix them they have a super intelligent fix..... Silicon between the pad and brake caliper piston. Not lots just a few dobs to hold them.

I boutght some antysqueel pads that stick on the back of brake pads and they worked great. it was 3m double sided tape.

The squeel is the pad vibrating on the disc and pistion. by rubber isolation it to the pistion it does not squeel.

Simple ehh....