A bit of a surprise today.

[LesXRN]

Having read a few comments regarding squeaky park brake pads and my Vanquish developing a squeak at low speed left turns, I decided to take a look today.

I removed the outer half of the park brake caliper, complete with the pad, which looked perfectly OK. I then removed the inner pad and found the cause of the squeak. The brake material was completely missing having detached from the backing plate.
Definitely not what I expected to find. Thankfully the disc is OK.

I found a new set on the Bay, they are made by Textar but have a Brembo logo on them. £53.63 for a full set.

Here's a photo of the offending article.

[Longy00000]

A nice catch it seems.
Could have been so much worse

[LesXRN]

Longy00000 said:

A nice catch it seems.
Could have been so much worse

It would if the disc had been damaged, very expensive too I bet.

[GTRene]

look if the outer pistons still come out (if all works well check and or clean), the inner side seems to work or did the work alone? or did it really let loose the brake pad?.

[LesXRN]

GTRene said:

look if the outer pistons still come out (if all works well check and or clean), the inner side seems to work or did the work alone? or did it really let loose the brake pad?.

There are no outer pistons on the park brake caliper, just the self adjusting inner part. It seems that the inner pad broke loose from the backing plate and I haven't a clue why that would happed other than poor manufacturing processes.

At least I seem to have found the cause of the mysterious squealing noise!

[Ninja59]

Not the first time I have heard of friction material parting company with the backing plate sadly. It is the first on a handbrake pad though.

Oddly, it is on Volvos, but V60 Polestars which had 6 pots up front. Some suffered with crumbling, others with this issue. Ours suffered with crumbling.

Sadly, there is some commonality in supplier though, Brembo.
I believe Brembo put extra hooks on the backing plate to resolve it and altered the compound slightly.

[reddiesel]

Delighted its not " big" money for you Les

[Craig elam1]

If it’s same caliper as earlier db9 it’s a sliding design , it runs on 2 posts, you should be able to move the caliper in and out reasonably freely, if it’s seized on the posts then the outer never wears just the inner, although I have seen the friction lining come off the backing.
Mine replacements crossed over to s type jag

[LesXRN]

Craig elam1 said:

If it’s same caliper as earlier db9 it’s a sliding design , it runs on 2 posts, you should be able to move the caliper in and out reasonably freely, if it’s seized on the posts then the outer never wears just the inner, although I have seen the friction lining come off the backing.
Mine replacements crossed over to s type jag

Luckily Craig the caliper is really free moving, so no worries there.
The pads cross reference with a few cars so are available a lot cheaper than a main dealer.

I'm hoping to fit them on Wednesday, then off from the Mayenne up to Cheshire on Thursday via the tunnel.

[GTRene]

LesXRN said:

GTRene said:

look if the outer pistons still come out (if all works well check and or clean), the inner side seems to work or did the work alone? or did it really let loose the brake pad?.

There are no outer pistons on the park brake caliper, just the self adjusting inner part. It seems that the inner pad broke loose from the backing plate and I haven't a clue why that would happed other than poor manufacturing processes.

At least I seem to have found the cause of the mysterious squealing noise!

ow ships, missed (did not read it well enough) that part 'parking brake' in your story :-) I mostly have worked with BMW Z3/E30 and so on parking brakes which look way different and different set up, so I fooled myself when seeing the bake pad instead of a brake shoe.

those are not used so much (by most people) and can get old, then all weather, cold warm and heat then after years can crumble or in your case worse I guess, you would think those would last longer, maybe a 'bad' batch.

[LesXRN]

GTRene said:

ow ships, missed (did not read it well enough) that part 'parking brake' in your story :-) I mostly have worked with BMW Z3/E30 and so on parking brakes which look way different and different set up, so I fooled myself when seeing the bake pad instead of a brake shoe.

those are not used so much (by most people) and can get old, then all weather, cold warm and heat then after years can crumble or in your case worse I guess, you would think those would last longer, maybe a 'bad' batch.

Could be a bad batch I guess. They are original from new.
The only time I've had this happen previously was on a Volvo V70 park brake shoe.