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[chrisgixer]

Had young Grain Ben round today, bit of a knock, bit of tyre wear, concerns over loose wishbone bolts and a general look over the suspension, prior to set up and new tyres.


Rearward wishbone bush failed but not enough to cause a knock. So what's causing the (slight) knock...?

Well, its coming from the pas side.
With car on stands, thump the drivers road wheel with a closed hand and there's no noise other than reverberation through the suspension. Pas side however, and there's a clank. Foot in brake, no clank. So wheel off, check caliper, there's play and a wobble.
Caliper off, check the pins for play, lower ones had a fair bit of play. Check the pads, pattern parts. These have no rubber sticker on one pad like tc ones have. Ie both pad backs are bare metal.

So conclude, pin wear and no rubber sticker on the pad back is allowing the caliper to knock slightly over bumps. Also, tc pads should be fitted with the brake pad with rubber sticker on the outboard clipper side (as opposed to against the piston)

Point? Fit genuine parts. 

[tunnie]

Given the price on TC too at £15+ vat approx? Another reason 

[chrisgixer]

Given the price on TC too at £15+ vat approx? Another reason 

These where similarly priced. So not as good value.

[grain.ben]

Had young Grain Ben round today, bit of a knock, bit of tyre wear, concerns over loose wishbone bolts and a general look over the suspension, prior to set up and new tyres.


Rearward wishbone bush failed but not enough to cause a knock. So what's causing the (slight) knock...?

Well, its coming from the pas side.
With car on stands, thump the drivers road wheel with a closed hand and there's no noise other than reverberation through the suspension. Pas side however, and there's a clank. Foot in brake, no clank. So wheel off, check caliper, there's play and a wobble.
Caliper off, check the pins for play, lower ones had a fair bit of play. Check the pads, pattern parts. These have no rubber sticker on one pad like tc ones have. Ie both pad backs are bare metal.

So conclude, pin wear and no rubber sticker on the pad back is allowing the caliper to knock slightly over bumps. Also, tc pads should be fitted with the brake pad with rubber sticker on the outboard clipper side (as opposed to against the piston)

Point? Fit genuine parts. 

As I stressed earlier Chris  , those pads were fitted before I found this site, not knowing its best to use gen gm parts, and I really have taken that on board now.

Although, the Motorquip pattern pads have lasted a very long time, but that's no excuse for not using gen gm parts  :

Also, thanks very much for today, im learning all the time now, and thank the mrs for the cold beverage, twas lovely in this in heat 

[omega3000]

Had young Grain Ben round today, bit of a knock, bit of tyre wear, concerns over loose wishbone bolts and a general look over the suspension, prior to set up and new tyres.


Rearward wishbone bush failed but not enough to cause a knock. So what's causing the (slight) knock...?

Well, its coming from the pas side.
With car on stands, thump the drivers road wheel with a closed hand and there's no noise other than reverberation through the suspension. Pas side however, and there's a clank. Foot in brake, no clank. So wheel off, check caliper, there's play and a wobble.
Caliper off, check the pins for play, lower ones had a fair bit of play. Check the pads, pattern parts. These have no rubber sticker on one pad like tc ones have. Ie both pad backs are bare metal.

So conclude, pin wear and no rubber sticker on the pad back is allowing the caliper to knock slightly over bumps. Also, tc pads should be fitted with the brake pad with rubber sticker on the outboard clipper side (as opposed to against the piston)

Point? Fit genuine parts. 

 
 

[TheBoy]

With GM TC pads being tried and tested on here, and from personal experience, I can assure you they can withstand an awful lot of road abuse, there is no reason to use anything else.

I had an Omega (not a member) round here a few weeks ago, looking for an emissions related code, took it for a spin, and the brakes were shockingly bad, he'd recently had some no-name crappy pads that ECP had flogged him for about £15 fitted. He thought it was a bargain, and said he didn't mind that it didn't stop as well.

[omega3000]

Had young Grain Ben round today, bit of a knock, bit of tyre wear, concerns over loose wishbone bolts and a general look over the suspension, prior to set up and new tyres.


Rearward wishbone bush failed but not enough to cause a knock. So what's causing the (slight) knock...?

Well, its coming from the pas side.
With car on stands, thump the drivers road wheel with a closed hand and there's no noise other than reverberation through the suspension. Pas side however, and there's a clank. Foot in brake, no clank. So wheel off, check caliper, there's play and a wobble.
Caliper off, check the pins for play, lower ones had a fair bit of play. Check the pads, pattern parts. These have no rubber sticker on one pad like tc ones have. Ie both pad backs are bare metal.

So conclude, pin wear and no rubber sticker on the pad back is allowing the caliper to knock slightly over bumps. Also, tc pads should be fitted with the brake pad with rubber sticker on the outboard clipper side (as opposed to against the piston)

Point? Fit genuine parts. 

Thats what was happening to mine  No rubber on the backs 

[chrisgixer]

Had young Grain Ben round today, bit of a knock, bit of tyre wear, concerns over loose wishbone bolts and a general look over the suspension, prior to set up and new tyres.


Rearward wishbone bush failed but not enough to cause a knock. So what's causing the (slight) knock...?

Well, its coming from the pas side.
With car on stands, thump the drivers road wheel with a closed hand and there's no noise other than reverberation through the suspension. Pas side however, and there's a clank. Foot in brake, no clank. So wheel off, check caliper, there's play and a wobble.
Caliper off, check the pins for play, lower ones had a fair bit of play. Check the pads, pattern parts. These have no rubber sticker on one pad like tc ones have. Ie both pad backs are bare metal.

So conclude, pin wear and no rubber sticker on the pad back is allowing the caliper to knock slightly over bumps. Also, tc pads should be fitted with the brake pad with rubber sticker on the outboard clipper side (as opposed to against the piston)

Point? Fit genuine parts. 

Thats what was happening to mine  No rubber on the backs 

I must admit, I was always unsure which way to fit the pads. Rubber backing to the calliper or piston...? Historically its not made any odds ime. Until today.

I presume this is the reason for the backing, from what saw today. If so, rubber backing on the outboard pad it seems. We'll see what happens when its re bushed and the polys are re greased as to the noise, as this needs doing anyway.

If the noise persists then new tc pads and go from there.

I use oe pads anyway, soft metal shims riveted to both sides. (As opposed to the cast metal backing to caliper)

[VXL V6]

I use oe pads anyway, soft metal shims riveted to both sides. (As opposed to the cast metal backing to caliper)

Struggling to get the rear OE's now. Can still get the fronts though.

[Broomies Mate]

Meh, Omega brakes are utter shite anyway.

Don't get me wrong, they'll stop you from 100-0 very well....... once.

What I don't understand is, the car has reasonable size discs (all round) decent pad surface....... but overheat quickly.

My e39 (similar size and weight) will stop numerous times in quick succession without brake fade. Why?

[chrisgixer]

IMO they are under sized tbh. Need bigger discs, with twin pot opposing calliper minimum.

[tunnie]

Or just brake earlier 

... and carry less "ballast" 

[chrisgixer]

Or just brake earlier 

... and carry less "ballast" 

Or fit a less powerful engine

[chrisgixer]

Its not just capacity either, pedal feel and level of servo assistance are exceptionally poor, for my taste.

[henryd]

IMO they are under sized tbh. Need bigger discs, with twin pot opposing calliper minimum.

Agreed,my Signum has way bigger brakes on a lighter car,313mm on the front I think