Rear Brake Caliper (Drivers side) Granturismo Sport.

Sam McGoo

Member
Messages
1,746
As above , does anyone know of one or have one available asap?
I've found one on ebay, that can be delivered Tuesday but thought I'd ask here anyway just in case.

An attempted extraction of a very seized nipple hasn't gone well. :worried1:
 

CatmanV2

Member
Messages
48,547
As above , does anyone know of one or have one available asap?
I've found one on ebay, that can be delivered Tuesday but thought I'd ask here anyway just in case.

An attempted extraction of a very seized nipple hasn't gone well. :worried1:

As the actress said to the bishop...

Sorry to hear about that, Sam

C
 

Sam McGoo

Member
Messages
1,746
As the actress said to the bishop...

Sorry to hear about that, Sam

C

Thanks Cat.
It was one of those days lol. It had penetrating fluid on it for 24 hrs, I was so careful, but it inevitably sheared even after applying heat. Then slowly drilling it and trying the easy-outs in increasing sizes....then twang...easy out in there too.
Then Diamond drill bit to get that out, by which time the sealing seat was damaged.
It was absolutely welded in!

I'm aware of a repair kit you can get, but think it best to just replace it.
Gutted, as I'm gonna have to paint it too!
 

philw696

Member
Messages
25,119
Sorry to be reading that you have got to this point and it's one of the problems with different metals and the nipple being over tightened.
Using the best easy outs too and I'm shamefully going to say Snap On have never let me down.
Is it worth getting an engineering shop to take a look ?
 

conaero

Forum Owner
Messages
34,593
It’s something we always wince at. Every car gets a brake bleed but you can tell the ones that are going to snap so they get left. We think its from where the brakes were not or never have been bled before.

Before you give up on it, it’s with trying to tap it out.
As it has a central hole in the sheered off bit it’s worth a go or take it to an engineering firm.

you need to set the depth you drill as the base is tapered

File the snapped bit off flush, get a new nipple and measure the thread, drill out with a 0.5 undersized drill then run the tap through it.

fill with fluid via the working nipple then push the pistons in to purge any swarf.
 
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Sam McGoo

Member
Messages
1,746
It’s something we always wince at. Every car gets a brake bleed but you can tell the ones that are going to snap so they get left. We think its from where the brakes were not or never have been bled before.

Before you give up on it, it’s with trying to tap it out.
As it has a central hole in the sheered off bit it’s worth a go or take it to an engineering firm.

you need to set the depth you drill as the base is tapered

File the snapped bit off flush, get a new nipple and measure the thread, drill out with a 0.5 undersized drill then run the tap through it.

fill with fluid via the working nipple then push the pistons in to purge any swarf.

Yeah, I think you're right. It must be the lazy bleeders in the garages! It's nearly always the inner bleed nipples too. I didn't have the option of leaving it, as I'd replaced the brake lines with braided and was changing the fluid to RBF600.
Great advise though Matt, thanks. @conaero.
I've had it with a couple of my previous cars too, but always managed to succeed eventually, whether it be with heat or re-tapping.
The problem I had with this one was unfortunately even with the diamond drill, the broken easy-out steered me slightly off centre so by the time it was all out, it was never gonna seal again as the orifice was off centre in the tapered seat.
In hindsight an engineering firm almost certainly would have done a better job with the right equipment, but having never failed with one before, I just cracked on with it lol

Anyway, I did source a spare, but unfortunately it still hasn't arrived yet. Tomorrow hopefully.
 
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