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2006 C4 1.6 16v rounded caliper carrier bolts help to remove and size bolt to replace.

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Dtsc419   
Thu May 07 2020, 05:34am
Member No: #53461
Joined: Apr 04 2019
Location: Falkirk, Scotland
Hi Folks,

I was doing my discs and pad on my C4 and done the front no problem but went to do the back ones and looks like previous owner had a go them self's but failed badly cause driver side rear carrier torque head bolts are rounded. Am gonna replace them just to see if anybody knew the size of the bolts and any help to get those bolts out would be appreciated.

Thanks

Dave
BigJohnD   
Thu May 07 2020, 07:57am

Member No: #82
Joined: Jan 22 2007
Location: Hoylake
Are they Torx T55s? Or conventional hex?
Dtsc419   
Thu May 07 2020, 08:40am
Member No: #53461
Joined: Apr 04 2019
Location: Falkirk, Scotland
BigJohnD wrote ...

Are they Torx T55s? Or conventional hex?

I'm not 100 % sure buddy tbh
vexorg   
Thu May 07 2020, 12:36pm
Member No: #48843
Joined: Jul 06 2017
Location: Scotland
I'd get them from citroen, caliper bolts are usually fine thread and high tensile bolts.
Dtsc419   
Thu May 07 2020, 12:42pm
Member No: #53461
Joined: Apr 04 2019
Location: Falkirk, Scotland
I'm gonna call euro car parts tomorrow hopefully they can help. Rather citroen replacement parts but aftermarket woukd have been good.
BigJohnD   
Thu May 07 2020, 05:50pm

Member No: #82
Joined: Jan 22 2007
Location: Hoylake
Dtsc419 wrote ...

BigJohnD wrote ...

Are they Torx T55s? Or conventional hex?

I'm not 100 % sure buddy tbh

T55 needs a Torx key like this to turn it:


A hex bolt needs a conventional socket:
1 User said Thank You to BigJohnD for this Post :
 Zeus (29 May 2020 : 06:34)
Dtsc419   
Fri May 08 2020, 04:07am
Member No: #53461
Joined: Apr 04 2019
Location: Falkirk, Scotland
Aw ok my apologies I thought you were meaning different types of trx. It's defo a trx on it I do have them but it just jumps it if I even try it. It's limited room to hammer a socket on it too.
BigJohnD   
Sat May 09 2020, 05:01am

Member No: #82
Joined: Jan 22 2007
Location: Hoylake
A Screw Remover/Extractor is your best bet. But you'll need a heavy duty version.
vexorg   
Sat May 09 2020, 09:45am
Member No: #48843
Joined: Jul 06 2017
Location: Scotland
Usually big bolts like that are the female torx, that need the "E-xx" sockets to remove
DeuxChevaux   
Sun May 10 2020, 03:23am
Member No: #16472
Joined: Nov 21 2010
Location: North Norfolk UK
Last one I had to get out came out with heat to destroy the grip from the thread lock and then I welded a nut onto the bolt by which time it came out easilly - next one I'll try just the nut first as the heat from welding may well do the job of loosening the thread lock as well
Dtsc419   
Thu May 21 2020, 11:42am
Member No: #53461
Joined: Apr 04 2019
Location: Falkirk, Scotland
Hey guys good news got the bolts out with some good old fashion heat and a 9/16 socket hammered over the bolts and bingo they come out. So all new discs, pads and new sliders for the carriers since both sides had one seized. Happy with my result big thanks to you guys for all the help. Much appreciated 👍🏻 av put some pictures on to show you my work 😁

Dtsc419   
Thu May 21 2020, 11:47am
Member No: #53461
Joined: Apr 04 2019
Location: Falkirk, Scotland
Sorry I don't know how to upload pictures from my phone.
routemaster1   
Thu May 21 2020, 12:51pm
Member No: #574
Joined: Jul 08 2007
Location: Dorset
Dtsc419 wrote ...

Sorry I don't know how to upload pictures from my phone.


You can only upload pictures if you are a premier member. You can upload to a site like Flickr and post a link.
 

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