Brake Calliper bolts.

Hi all ,
Needed to do work on front brakes today only to discover a gorilla had worked on them previously and rounded off the 13mm star MP heads using a vise grips or something , and I can 't remove them now. any good suggestions please ? Was thinking of welding something on to the bolts to undo them but afraid of heat damage to other parts .Any ideas.
Thanks
Disco 1 300tdi year 97

1/2" multipoint socket fits better, you probably knacked them using the 13mm.
Oh, this is on my 86 110, disco may be different..

I have tried using the proper socket , but I only have this disco 6 months. I think its welding time .
Thanks anyway .

I meant a 1/2 AF (imperial size) socket NOT 1/2" drive.
A 13mm socket will round them off if they are tight.
I'll post a picture up in a bit for you if I can remember how.

welding is fine ,heat will help break the hold

Bottom pic shows the 1/2 " size, top pic shows the 12 point business end.

Thanks Flossie I have one of these 1/2 AF and tried to use it , but some sod was there before me and knackered the heads, some of them are pure round . Brake pads are almost new so rust may not be too big a problem..

Try giving them a SMACK with a hammer then try waking a 12mm socket on them !

Steve

Irwin bolt grips are made just for this circumstance. I have used them successfully loads of times when I was ready to go for the welder.

Thanks Valdershelf.Good advice Heard about these irwin grips . i need vehicle today so I have to try welder as I dont have the Irwin tool.

What is it you need to do to the brakes? Could it wait till you get some irwins? They are a super good bit of kit

Hi Flat ,
Wheel bearing needs replacing . Tried the welding cant get enough leverage to open even using 2LB lump hammer. Too little space in there to operate , will have to do partial corner strip down to make space.Ordered new bolts anyway.Looks like someone used an air tool to lock them up and chewed the old bolt heads . I cant get enough leverage to open .
What size socket would I need using the Irwin tool as these heads are bad and ultra tight. ?

I use these

http://www.homebase.co.uk/en/homeba...vc:c|adp:1o5&gclid=COagyKS_48wCFYu6GwodvDEOHg
and also have the expansion set when working on the brakes, never let me down yet

Got the bolts out ...
I made room by removing brake pipe and a steering rod used a 14mm spanner and welded it good . Then a good bang with the 2LB hammer it opened ....then removed welded spanner and welded on a 13mm nut and wound bolts out.
I think heads were beyond the Irwan tool as they were more like round 12mm pipe .
I checked all the other callipers and they are perfect
Thanks everybody for help.