Hi guy's. Fitted some new pads yesterday in the rear of the zed and decided I'd see if they were ok today. Out I go targas off windows down only to hear a horrendous squealing noise! And not just under breaking but all the time! Just got it on a jack now and looked at it and nothing seems to be amiss apart from the pads seem to be touching the disc. Is this normal or do I have another problem?

 

Cheers

 

Ivan

put some oil on them, should sort it out! :x: :shock: :shock:

Cheers Scoops for the quick reply but not what I want to hear right now :slap: :nono:

The pads should be touching the disk.

 

Pads take a while to wear in. Give it longer

1st off have the pistons siezed on on them, may need cleaning off with some brake cleaner.

 

2nd could be the wear indicators touching the disc, they can get bent quite easy when putting the new pads on, I take the wear indicators off mine from new now so that I get no grief from them as they tend to make noise when the pads are only 1/2 worn.

 

3rd. Im not sure on this but i think its possible to put the rears on the wrong way round, therefor the wear indicators will permanantly rub on the disc. Might be worth checking that the wear indicators are on the outside.

 

Good Luck.

Are the wear indicators the brass clip things? If so they were on the inside pads when I took them out?

2 secs ill check.

SRREA is right, leave them to bed in for a while. Old calliper seals don't 'roll back' fully so the pads contact the discs more then they should. It is normal not to be able to see air between the pads and discs, but the hubs should spin by hand (out of gear, both rear wheels off the ground). Were the pads hard to squeeze in? Also loosen the brake fluid reservoir lid. If the vent is blocked there may be some residual pressure in the system causing the pads to bind.

 

In the 14 days I've had my Z I haven't had to do the rear brakes yet so i don't know their configuration. However, if they are like other Jap brakes there will be thin metal plates between the pads and anchor bracket / calliper. Take these out while the pads bed in to give the callipers some breathing space (they are only there to suppress squel) and put them back when the pads have worn enough to allow them to slip back in easily. Also apply copper grease to the back of the pads.

Wear indicators go on the outside, think thats your problem.

Ah could be B19rks but why didn't they squeal before?

SRREA is right, leave them to bed in for a while. Old calliper seals don't 'roll back' fully so the pads contact the discs more then they should. It is normal not to be able to see air between the pads and discs, but the hubs should spin by hand (out of gear, both rear wheels off the ground). Were the pads hard to squeeze in? Also loosen the brake fluid reservoir lid. If the vent is blocked there may be some residual pressure in the system causing the pads to bind.

 

In the 14 days I've had my Z I haven't had to do the rear brakes yet so i don't know their configuration. However, if they are like other Jap brakes there will be thin metal plates between the pads and anchor bracket / calliper. Take these out while the pads bed in to give the callipers some breathing space (they are only there to suppress squel) and put them back when the pads have worn enough to allow them to slip back in easily. Also apply copper grease to the back of the pads.

 

Sorry for being so dim but do you mean at the top and bottom of the pad area? Or between it and the piston?

Ah could be B19rks but why didn't they squeal before?

 

Dunno, pehaps the new ones are a bit sharper and not so covered in brake dust so the squeal louder?? :confused:

 

Im grasping a straws now!!

Hmmm just took the pads out and the inside one seemed to be very tight at the hub side/end of the caliper. Didn't seem to want to move in or out? Do you think that the edges of the pad need greasing? Does the back of the shim where it meets the piston need greasing?

Ok while the pads are off.

 

Take the top off the resevior and put some kitchen roll round it.

 

Spray brake cleaner all over the pistons, then force them back with a "suitable tool"

 

Then put it all back together and see how you go.

 

Good luck (again)

Hmmm interesting. Just greased the pads up on the sides and put them all back in which seemed to have gone better and been out for a run and seems the same. Doesn't sound like a brake type squeal but more of a metal on metal scrapey squeal. It's the same regardless of road speed (upto 60) and whether the brake is on or off.

i had a simaler noise it turned out to be the hand brake shoes there inside the rear disc

 

 

 

rod

Dont think it's the brake shoes because it wasn't doing it before I put the pads in. Just been out for 10 miles and it's still the same noise and still the same symptons. Gave it a bit of stick (not too much) and still regardless of speed and brake on/off/pressure it didn't make any difference.

Just a thought, but its not that noisey wheel bearing you got doing it is it? I know they squaek when they are well and truely buggered.

 

Did you put the pads with the wear indicators on the outside?

Nah not wheel bearing type noise. Looked on the CDROM manual I have and it shows the indicators on the inside? :confused: They are not touching the disc anyhow. Would they cause the noise if they weren't touching the disc? :confused:

Sorry for being so dim but do you mean at the top and bottom of the pad area? Or between it and the piston?

 

If you are talking about the grease, put it on the back of the pad and on all of the shims, if there are any.

 

The wear indicators should not make a noise if they aren't touching the discs, and it shouldn't really make a difference which pad carries the indicator, inside or out.

Have you solved it yet?

If you spin the wheel you must be able to hear it?

Theres has to be metal to metal contact somewhere - have you got a bent disc shield ?