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Bolt removal

Posted: Wed Mar 15, 2017 7:31 pm
by New Dexter
I had thought it would be a simple job. Jack up the car, after undoing the wheel nuts, remove two bolts holding the callipers to the suspension and then replace the pads.
However, as with many jobs on a car it was like pulling a thread on an old jumper. First the wheel nuts were very tight, then I had to use a "Daimler Screwdriver" to remove the wheel from the hub and to add further irritation I could not undo the two 8mm bolts that hold the calliper in place.
The heads are 13mm AF and after all the years they do not have a perfect hexagonal shape. I tried to use the oxyacetylene but there is too much in the locality that is made of rubber and might suffer damage.
The callipers are ATE and thus one cannot remove the pads through the top, the callipers themselves must be removed. Given the circumstances does anyone have any suggestions please? I have considered welding larger nuts to the damage bolt heads.

Re: Bolt removal

Posted: Wed Mar 15, 2017 8:10 pm
by Phillmore
Copious amounts of penetrating fluid of your choice and time to soak in and a pair of stilsons if the bolts are scrap anyway?

Re: Bolt removal

Posted: Wed Mar 15, 2017 8:21 pm
by NickDeAth
As above plus if the hexagon is that bad find a socket which is slightly smaller and hammer it onto the bolt, that should make it nice and tight. If you have a selection of AF and imperial sockets you can usually find one to do the job. Of course you will then need new bolts.

Nick.

Re: Bolt removal

Posted: Wed Mar 15, 2017 8:22 pm
by Vortex O'Plinth
Tried these? Bit expensive for a one-off job, but they do work.

Re: Bolt removal

Posted: Wed Mar 15, 2017 10:33 pm
by theoldman
How about one of those sockets which has pins inside? They are cheap enough.

I wouldn't be without mine - it was well worth the cost.

http://www.ebay.co.uk/itm/Magical-Grip- ... Swa~BYa~Q3

Neil

Re: Bolt removal

Posted: Thu Mar 16, 2017 10:13 am
by Phillmore
theoldman wrote: Wed Mar 15, 2017 10:33 pm How about one of those sockets which has pins inside? They are cheap enough.

I wouldn't be without mine - it was well worth the cost.

http://www.ebay.co.uk/itm/Magical-Grip- ... Swa~BYa~Q3

Neil
Looks good but it doesn't say what size socket drive it is?

Re: Bolt removal

Posted: Thu Mar 16, 2017 10:37 pm
by theoldman
Mines 1/2 inch
Neil

Re: Bolt removal

Posted: Fri Mar 17, 2017 9:59 am
by Chris_R
New Dexter wrote: Wed Mar 15, 2017 7:31 pm I could not undo the two 8mm bolts that hold the calliper in place.
The heads are 13mm AF and after all the years they do not have a perfect hexagonal shape.
8mm bolts and 13mm AF heads? You don't say what car it is but are you sure metric is correct? I would have expected Imperial sizes on a classic Daimler and a 1/2" head which is slightly smaller than 13mm. Using the wrong size socket or spanner can lead to rounded off heads as they apply forces at the wrong place.
Anyway, if you are using bi-hex sockets or spanners the area of grip is limited. Try a hex socket or spanner which will give a better grip on the head and allow more urge. Also, those Irwin removers are very good but limited to 3/8" drive only.

Re: Bolt removal

Posted: Sat Mar 18, 2017 2:31 am
by JT7196
Why not purchase a 1/2" to 3/8" adaptor, ???

Cheers A'l 😊😊😊☀️☀️