Brake Caliper Bolts Seized

[Thom]

Sorry lads, i admit this is not bike related but this was the best place i have access to!

I have a Ford Fiesta from '98 and the front right brake is binding quite severely. i need to remove and strip the caliper however the two bolts holding the caliper on are both seized and VERY rounded.

The bolts are fairly inaccessible, i cant grind the heads and drill them out due to this, a file is far too slow and i have no further ideas.

Any suggestions other than let a mechanic do it for me?
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Current Bike: 1996 Yamaha TRX850 (The Japanese-Ducati One).
Previous Bikes: 1990 Honda NSR125 'Rothmans' (The smoking one), 1990 Suzuki GS500e 'Caf? fighter' (The loud one), 1987 Kawasaki GPX400r (The quick one), 1997 XJ600s Diversion (The reliable one), 2000 Kawasaki ER-5 (The spontaneously combustive one)

[.....]

Can you get an impact driver in there?

[Thom]

unfortunately no, even on full lock i gain little extar in the way of space. i have a nasty feeling to get access it's going to involve removing various suspension components
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Current Bike: 1996 Yamaha TRX850 (The Japanese-Ducati One).
Previous Bikes: 1990 Honda NSR125 'Rothmans' (The smoking one), 1990 Suzuki GS500e 'Caf? fighter' (The loud one), 1987 Kawasaki GPX400r (The quick one), 1997 XJ600s Diversion (The reliable one), 2000 Kawasaki ER-5 (The spontaneously combustive one)

[DrDonnyBrago]

Hammer on a slightly smaller socket (lifetime guarantee helps!), try an imperial socket onto a metric bolt i.e. 9/16" onto a 15mm bolt as the 14mm will be harder to hammer on.

alternatively file two of the sides down and slip a spanner (maybe an adjustable one) over it.

failing that then a blow torch, penetrating fluid (not WD40!!!) and mole grips works wonders!

[DrDonnyBrago]

sorry I assumed it was a hex head bolt!

[Thom]

it is/was previously however they might as well be round, i assume theyre made of steel but theyre so soft its unreal.
____________________
Current Bike: 1996 Yamaha TRX850 (The Japanese-Ducati One).
Previous Bikes: 1990 Honda NSR125 'Rothmans' (The smoking one), 1990 Suzuki GS500e 'Caf? fighter' (The loud one), 1987 Kawasaki GPX400r (The quick one), 1997 XJ600s Diversion (The reliable one), 2000 Kawasaki ER-5 (The spontaneously combustive one)

[Kickstart]

Hi

I assume these are the large bolts holding the complete caliper to the hub (rather than small ones holding the sliding part of the caliper onto the carrier).

Can you remove the disk and get at the other end of the bolts? Access to a welder to weld a bolt onto the rounded heads (both to provide something to grip and also to get a load of heat in to undo them)?

Or something like these:-

https://www.machinemart.co.uk/shop/product/details/5-piece-bolt-grip-set/path/socket-sets-sockets-tool-sets/brand/irwin

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Raffles]

[Thom]

The bolts that mount the calliper to... their mountain point are 1/2" 6 point bolts. Certainly not allen bolts.

I cant remove the disc without removing the caliper, this may be possible if the piston wasnt seized and i could push the piston back into the caliper hwoever this isnt the case.
____________________
Current Bike: 1996 Yamaha TRX850 (The Japanese-Ducati One).
Previous Bikes: 1990 Honda NSR125 'Rothmans' (The smoking one), 1990 Suzuki GS500e 'Caf? fighter' (The loud one), 1987 Kawasaki GPX400r (The quick one), 1997 XJ600s Diversion (The reliable one), 2000 Kawasaki ER-5 (The spontaneously combustive one)