Brake Pads

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Gordon
Learner Driver
Posts: 69
Joined: Sun Apr 30, 2006 8:14 am
Location: Lancashire

Brake Pads

Postby Gordon » Wed Aug 29, 2007 10:32 am

I have had no problems with my brakes on my 53 Meg except for them always squealing which is annoying and something I have never had on previous models/other makes of cars.

When it has had a service it comes back and they are squeal free for a day or so and then it returns.

When the pads are due for replacement (not for about a year yet I hope) what are GreenStuff pads which I have seen on this forum. Are they the 'bees knees' and will they cure the problem? Why do the current ones squeal?

And are Green Stuff expensive as I am not a DIYer

Thanks

Gordon

AlexB
Driving Legend
Posts: 4312
Joined: Tue Mar 22, 2005 8:17 pm
Currently Drives:: Renaultsport R.S.250 Cup

Postby AlexB » Wed Aug 29, 2007 4:58 pm

The price is about £40 per axle delivered. Search the Internet for special offers.

No, there is no magic in these pads. They are just made with Kevlar, which is kind on disks, have a much wider thermal envelope and have a higher friction coefficient than the regular pads. GreenStuff will significantly improve braking and the overall driving experience if and only if all other parts of the brakes are in a good condition. It is probably the best road-legal pad one can get. On the other hand, many cars with standard pads don't squeal...

What causes squeal?
- Stuck calipers or hydraulic cylinders. I hope you changed the brake fluid twice by now. It serves 2 years maximum and it is a characteristic of the fluid and not a car.
- Rust. It is formed on the disk, sticks to the pad and creates a rust-to-metal friction pair.
- Burnt resin from overheated pads, which sticks to the disk, thus again forming a wrong friction pair.
- Burnt disk (blued).
- Some other sort of contamination of the friction material.
- Deformed calipers.
- Lack of lubrication on the back of pads.
- Incorrectly composed pad material.

A few relevant earlier discussions on this subject:

https://www.meganeownersclub.co.uk/forum ... greenstuff
https://www.meganeownersclub.co.uk/forum ... greenstuff
https://www.meganeownersclub.co.uk/forum ... greenstuff
https://www.meganeownersclub.co.uk/forum ... greenstuff
AlexB
(no, a different AlexB)

User avatar
Ray
Site Admin
Posts: 3845
Joined: Mon Mar 21, 2005 1:11 am
Currently Drives:: 2005 Megane Privilege - Now Sold
Location: Hong Kong

Postby Ray » Wed Aug 29, 2007 6:29 pm

I just got the rears pads today and am aiming to fit the Greenstuff pads (front and rear) this saturday.

I got them from Brakes4U which were the cheapest with postage. Rears came to about £38


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