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Author Topic: What causes......  (Read 970 times)

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Taxi_Driver

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What causes......
« on: 15 June 2008, 21:59:36 »

Yer brakes to squeak just as your about to stop?

Fitted new pads to the front yesterday........

Did as MDTM said in another thread.....pad with rubber goes on the oustside......pad without goes on piston side.......tho this was the opposite of how the old pads were fitted......id been previously following how the pads were fitted and vx dealer changed them so previously kept to how they did it...

Mark did say in the other thread..note the direction of rotation marked on the pads......now im a bit blind.......but there wasnt any rotation marks on the pads i got from the vx dealer from what i could see.....

Spayed em with copper grease all sides...except pad side obviously before fitting.........but........

Just as i pull up and about to stop they squeek........breaking at speed they dont but just as i stop theres the squeak!........have i done summat wrong??  :-/

Or do they just need to bed in  :-/
« Last Edit: 15 June 2008, 22:09:20 by Taxi_Driver »
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JamesV6CDX

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Re: What causes......
« Reply #1 on: 15 June 2008, 22:01:47 »

I think you just notice it more TD with so much city driving...
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theolodian

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Re: What causes......
« Reply #2 on: 15 June 2008, 22:02:20 »

The leading edge of the pad should be chamfered (from the factory).  Reduces bite, but also the squeak.
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TheBoy

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Re: What causes......
« Reply #3 on: 15 June 2008, 22:04:46 »

Yup, file a 45 degree angle on leading edge :y
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Taxi_Driver

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Re: What causes......
« Reply #4 on: 15 June 2008, 22:12:03 »

Quote
Yup, file a 45 degree angle on leading edge :y

They were filed........or machine cut by the looks of it......on leading and trailing edges.........or do they need more of a file  :-/
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theolodian

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Re: What causes......
« Reply #5 on: 15 June 2008, 22:14:07 »

Quote
Quote
Yup, file a 45 degree angle on leading edge :y

They were filed........or machine cut by the looks of it......on leading and trailing edges.........or do they need more of a file  :-/
Have you pumped the brake pedal down to get the pistons fully against the pads?  Were the sliding pins OK, not seized?

Otherwise, probably just need bedding in.
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Taxi_Driver

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Re: What causes......
« Reply #6 on: 15 June 2008, 22:22:27 »

Quote
Quote
Quote
Yup, file a 45 degree angle on leading edge :y

They were filed........or machine cut by the looks of it......on leading and trailing edges.........or do they need more of a file  :-/
Have you pumped the brake pedal down to get the pistons fully against the pads?  Were the sliding pins OK, not seized?

Otherwise, probably just need bedding in.

Not quite sure what you mean........undid the 13mm bolt and lifted the caliper up to change the pads.....replaced the bolt as supplied with the pads and tightened to 30nM......

And yes i pumped the brakes before driving..........done about 150 miles since changed  :y
« Last Edit: 15 June 2008, 22:24:53 by Taxi_Driver »
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TheBoy

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Re: What causes......
« Reply #7 on: 15 June 2008, 22:24:45 »

Quote
Quote
Quote
Quote
Yup, file a 45 degree angle on leading edge :y

They were filed........or machine cut by the looks of it......on leading and trailing edges.........or do they need more of a file  :-/
Have you pumped the brake pedal down to get the pistons fully against the pads?  Were the sliding pins OK, not seized?

Otherwise, probably just need bedding in.

Not quite sure what you mean........undid the 13mm bolt and lifted the caliper up to change the pads.....replaced the bolt as supplied with the pads and tightened to 30nM......
Was the caliper free to slide from side to side?
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cem_devecioglu

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Re: What causes......
« Reply #8 on: 15 June 2008, 22:28:25 »

if I'm not wrong old discs cause this sound..Whenever I changed them (front) or cut the with the machining (rear) this noise is lost
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Taxi_Driver

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Re: What causes......
« Reply #9 on: 15 June 2008, 22:35:44 »

Quote
Quote
Quote
Quote
Quote
Yup, file a 45 degree angle on leading edge :y

They were filed........or machine cut by the looks of it......on leading and trailing edges.........or do they need more of a file  :-/
Have you pumped the brake pedal down to get the pistons fully against the pads?  Were the sliding pins OK, not seized?

Otherwise, probably just need bedding in.

Not quite sure what you mean........undid the 13mm bolt and lifted the caliper up to change the pads.....replaced the bolt as supplied with the pads and tightened to 30nM......
Was the caliper free to slide from side to side?

Im a bit of numpty........so dunno  ::) it seemed free to me.........but if youve read my other thread....the pads on drivers side were down to metal on metal.....passenger side only a bit less than 50% worn..... :-/

It might be a sticky caliper  :-/
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theolodian

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Re: What causes......
« Reply #10 on: 15 June 2008, 22:37:45 »

Quote
Quote
Quote
Quote
Quote
Quote
Yup, file a 45 degree angle on leading edge :y

They were filed........or machine cut by the looks of it......on leading and trailing edges.........or do they need more of a file  :-/
Have you pumped the brake pedal down to get the pistons fully against the pads?  Were the sliding pins OK, not seized?

Otherwise, probably just need bedding in.

Not quite sure what you mean........undid the 13mm bolt and lifted the caliper up to change the pads.....replaced the bolt as supplied with the pads and tightened to 30nM......
Was the caliper free to slide from side to side?

Im a bit of numpty........so dunno  ::) it seemed free to me.........but if youve read my other thread....the pads on drivers side were down to metal on metal.....passenger side only a bit less than 50% worn..... :-/

It might be a sticky caliper  :-/
Both pads and it's the piston, although possibly the other caliper.  One pad it's the sliding pins.
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Taxi_Driver

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Re: What causes......
« Reply #11 on: 15 June 2008, 22:50:13 »

Quote
Quote
Quote
Quote
Quote
Quote
Quote
Yup, file a 45 degree angle on leading edge :y

They were filed........or machine cut by the looks of it......on leading and trailing edges.........or do they need more of a file  :-/
Have you pumped the brake pedal down to get the pistons fully against the pads?  Were the sliding pins OK, not seized?

Otherwise, probably just need bedding in.

Not quite sure what you mean........undid the 13mm bolt and lifted the caliper up to change the pads.....replaced the bolt as supplied with the pads and tightened to 30nM......
Was the caliper free to slide from side to side?

Im a bit of numpty........so dunno  ::) it seemed free to me.........but if youve read my other thread....the pads on drivers side were down to metal on metal.....passenger side only a bit less than 50% worn..... :-/

It might be a sticky caliper  :-/
Both pads and it's the piston, although possibly the other caliper.  One pad it's the sliding pins.

Ahhh think i know what you mean now.........the calipers move about on the bolt you have do up.......you have to stop the inside nut from moving whilst you do up the outside bolt........if the case then yes they do move freely.......i think  :-/
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