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General Brake noise when reversing

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General Brake noise when reversing

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CPW218

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My wife has a 2009 Panda 100HP... which we all love. Prior to that we had a 2007 100HP. The '07 car always made this awful noise when it was reversing. It came from the rear brakes and sounded like a whale. If you carried on reversing and just dabbed the brake pedal, the noise stopped.

When we got the 2009 (59 plate) car I was hoping that it would no longer make the same noise, but as soon as I reversed it away from the dealer's front door... it did exactly the same thing - and it was brand new.

Twelve months on, I've just taken it in for its first service. Of course the garage says that it's never heard of this before. I suggested they have a look on here.

Has anyone found a solution to this awful racket? If so, I'd be delighted to hear about it.

Thanks,
Chris
 
The solution is to take out the rear pads and thoroughly clean up the rear callipers and the back of the pads. Methylated spirits works fine. If you can file off any loose rust from the edges of the discs, all the better.
Then put a very fine film of copper-based grease onto the back of the pads and the metal edges where they run within the calliper. Reassemble. If still noisy, try non-Fiat pads such as EBC. They are quieter.
There are some here who disagree with this but it worked for me on my 4x4, same rear brakes.
 
Thanks for the tips!!
If it stops raining long enough to have a look at it, I'll give it a go.
 
Betcha got rear discs and will bet further that the rear callipers float or in this case don't move that much the pads are literally held to the disc.

There is a reason.

The disc callipers float inside their housing effectively sliding in their mount. That float initially caused knocking from the rear when going over bumps (see many related topics Knocking from the rear). Fiat came up with an answer and applied some rather thick almost Evostik like grease which allows movement but stops the calliper knocking in the housing. Having fixed the knock the pads don't relax that much from the disc as the thick grease doesn't allow that much movement. Net result is when you reverse the pads cant slightly as they are in contact with the disc. They then rattle/vibrate against the disc giving the noise that is described.
If your Panda 4x4 or 100bhp doesn't make this noise it probably has knocking from the rear. I know what I prefer - I've had the knocking but prefer the vibes. :)
 
4x4 said:
Betcha got rear discs and will bet further that the rear callipers float or in this case don't move that much the pads are literally held to the disc.

There is a reason.

The disc callipers float inside their housing effectively sliding in their mount. That float initially caused knocking from the rear when going over bumps (see many related topics Knocking from the rear). Fiat came up with an answer and applied some rather thick almost Evostik like grease which allows movement but stops the calliper knocking in the housing. Having fixed the knock the pads don't relax that much from the disc as the thick grease doesn't allow that much movement. Net result is when you reverse the pads cant slightly as they are in contact with the disc. They then rattle/vibrate against the disc giving the noise that is described.
If your Panda 4x4 or 100bhp doesn't make this noise it probably has knocking from the rear. I know what I prefer - I've had the knocking but prefer the vibes. :)
Click to expand...

Cheers for that :)
 
Is mine the only 100HP that doesn't make this noise? If so, there may be a connection with handbrake use. I use the car on two or three days of the week only and on non-use days it sits in the garage with the handbrake off, so the handbrake's typically on for, possibly, three to five hours a week, rather than being on for the vast majority of the time.
 
babbo_umbro said:
Is mine the only 100HP that doesn't make this noise? If so, there may be a connection with handbrake use. I use the car on two or three days of the week only and on non-use days it sits in the garage with the handbrake off, so the handbrake's typically on for, possibly, three to five hours a week, rather than being on for the vast majority of the time.
Click to expand...

Hmmm you might be onto something there as mine is used everyday of the week and it is always left outside with the handbrake on as the garage is full of mine and my dad's bikes. :slayer:
 
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