squealing brakes

[docevi1]

hi, I posted across in suspension and brakes, but no-one seems to be about in there so echo'd my question here.

I recently replaced my standard Marina pads with Green Stuff units, bed them in as the last thread suggested (10 stops of increasing pressure from 60-5 allowing the brakes to cool in between) and whilst as the bads work well, they squeal like you wouldn't believe.

On the original pads was a small shim, which only went on half of the back of the pad (one presumes to make sure one side contacts first), I put this behind the new pads...

any ideas?

[Plotloss]

Did you liberally apply coppper slip?

[docevi1]

I have absolutely no idea what copper slip is

My dad was helping me as I've never changed brakes before, and all we did was pull the clips on the pad bars, pull the pads out, force the pistons back in, slide the new pads/replace bars and clips.

[KITT]

Copper slip or grease should be applied to the back of the pads and clips to stop the squealing you're getting You can get it in any motor factors.

[Plotloss]

Its copper grease, you put it on the back of the pads and it reduces squeal.

Some pads just squeal though, mine do.

Greenstuff have a bit of a reputation for it as well...

[GreigM]

Its always a big tradeoff - to be honest better pads usually mean loads of squealing. I've used performance friction and pagid pads and both squeal like i've installed a kitten instead of a pad.

If you're just for street use then generally speaking the stock pads are the best compromise between bite, wear, dust and squeal.

[docevi1]

do apply the copper grease to the back of the pad itself, of the back of the shim (or both)?

I can put up with a bit of squealing, but this hurts my ears it's so loud.

[Plotloss]

Both sides of the shim, the shim is trying to do what the copper slip will do a little better.

[docevi1]

Rightio, I'll do that this weekend them (along with bleeding the brakes ).

Fingers crossed. Thanks

[miniman]

Remeber... the back of the pads!!!

[docevi1]

Put the copper slip on the shim yesterday and went out for some fresh air this evening

They still squeal but no-where near as bad as before. Thanks guys!

[cobra kid]

miniman said:

Remeber... the back of the pads!!!

At a car supermarker I used to work for (it ended up on watchdog!!) one technician put pads in back to front another used multipurpose grease on the back and one put wishbones on Mondeos upside down and...the list goes on and on......and these people are qualified as well.

[omitchell]

i also have greenstuff pads and they squeak but only under moderate to light braking pressure so i just live with it for the stopping power it gives me