Removing rear Caliper bolts

[Classic Chim]

8mm Allen head I believe.

I’ve got one on a 1/2 in drive socket but it’s to short to reach the top one and clashes with the hub carrier. Do I need a long reach one of similar type as mine are tight as you like and an Allen key won’t do the job for one moment.
Rattle gun but you’d never get one behind so what’s best practice here... heat and plenty of penetrating oil as I’m sure to be rounding these Allen heads off before loosening them as they are welded tight. I’ve smacked them with hammers etc but not feeling confident these are coming loose easily.
Any tips would be kindly accepted.

[Steve_D]

They are normally high tensile flange headed hex bolts.
https://www.nutsandbolts.co.uk/metric-flange-bolts...

The top bolt stays in place because it is too close to the upright. It can be released but not removed. Because of this I cant see how cap head bolts will work unless they are fitted before the hub is attached to the upright.
For now you will need to undo the 4 bolts holding the hub to the upright. You can get at these bolts through the wheel mounting flange.

Steve

[ianwayne]

I had issues with an allen headed bolt on my front brake carriers last year.

I read a tip somewhere (but can't find it now) that if an allen head bolt gets rounded off, you can often get purchase uses a torx drive. I know that sounds perverse but it worked for me. The torx head gives more points of contact.

[Classic Chim]

Steve_D said:

They are normally high tensile flange headed hex bolts.
https://www.nutsandbolts.co.uk/metric-flange-bolts...

The top bolt stays in place because it is too close to the upright. It can be released but not removed. Because of this I cant see how cap head bolts will work unless they are fitted before the hub is attached to the upright.
For now you will need to undo the 4 bolts holding the hub to the upright. You can get at these bolts through the wheel mounting flange.

Steve

Someone’s replaced mine with Allen head bolts maybe?
They look like they’ve been there a long time.
Is it possible someone can have removed the outside pad, remove disc then remove inside pad as im wondering if either have ever been undone before yet I had new pads and discs only a couple of years ago!

Thanks Steve and yes I’ve looked at those 4 bolts. Hmm!

And thanks fit the torque bit idea, hopefully I’ll not be going there Ian

Edited by Classic Chim on Tuesday 12th June 22:48

[Zeb74]

I've just changed brake pads all around and front discs.
For front calipers it was 7mm allen, for mounting brackets it was 5/16 allen.
Rear calipers were mounted with 13mm bolts and 15mm lock-nuts.

[BoostedChim]

Rear caliper bolts come out fine, I thought they were 7mm though. I have an allen key that has had short leg ground down to fit.

[over_the_hill]

Not sure about the bolts but the caliper pins are 7mm - standard Ford.
If you buy a 'toolbox' set of Allen Keys there is usually not a 7mm included as they go something like 5mm, 6mm, 6.5mm, 8mm.