This is intended as a guide only if your in any doubt over you ability to do this consult a qualified mechanic as your brakes are rather important
bit of an add on to this guide as im not going over the intimate details of pad removal again for the sake of it
https://www.fiatforum.com/grande-punto-guides/210073-front-caliper-strip-clean.html
So car parked safely wheels chocked hand brake applied
car jacked and axle standed and front wheel off
remove the caliper piston body using a 13mm spanner as in the above guide and the pads (if your new pads come with clips look how the old pad spring clips fit as they only fit on one way)
clean the piston
clean then remove the brake fluid cap off the header tank
((DO NOT SPILL ANY FLUID ON YOUR PAINTWORK OR IT WILL REMOVE IT))
next reset the piston ensuring you do not damage the rubber piston seal boot
i used a g clamp but you can get a special tool to do this from most motor factors
do this slowly to give the fluid chance to move back without putting any undue pressure on the seals
now i have dropped a bo bo here and not got a photo of this step but i will try and get one when i get chance
you need to undo the caliper carrier using a 19mm socket and remove the 2x bolts
so this bit comes off
now you can get the disc off
using a T30 Torx bit undo the 2 torx aligning bolts these are commonly seized in so a bit of release oil might help and in my case a hammer and impact driver
once both are removed either the disc will drop off with a slight pull or need braying round the edge with a hammer to crack any corrosion
clean the stub axle up and coat with copper grease (makes changing them next time easier)
now get your new disc and clean it well with brake cleaner (they come coated in light oil to prevent rusting in storage)
and refit
apply copper grease to the threads of the torx bolts to make removal easier next time
refit the caliper carrier putting a drop of threadlock on the bolt threads for added security
then fit the new sping retainer clips and new pads greasing the back of them lightly (on the piston side the other side bonds in place with a sticky pad so degrease the caliper where the pad will stick
ultimately you will be left with this
19mm caliper across flat carrier bolts Torque 9.9 ÷ 11.0 (daNm)
13mm across flats caliper bolts torque to 2.7 ÷ 3.3 (daNm)
T30 torx bolts torque 0.9 ÷ 1.4 (daNm)
now refit the wheel and do the other side
check fluid doesnt over flow as you reset the piston
once the other side is done pump the brake pedal slowly with the cap off to reset the pistons then refit the cap
now start the car and pump the brakes and check they feel ok
now do several low speed stops in a quiet area to check all is working as it should
AND IMPORTANTLY DRIVE WITH GREAT CARE FOR THE FIRST HUNDRED OR SO MILES OR SO TO GIVE THE NEW PADS AND DISCS TIME TO BED IN AND GET TO FULL POWER AS YOU MIGHT FIND THEM LACKING IN BITE FOR A WHILE i know of a chap who stuffed his car into the back of another having just had his brakes done so it can happen
bit of an add on to this guide as im not going over the intimate details of pad removal again for the sake of it
https://www.fiatforum.com/grande-punto-guides/210073-front-caliper-strip-clean.html
So car parked safely wheels chocked hand brake applied
car jacked and axle standed and front wheel off
remove the caliper piston body using a 13mm spanner as in the above guide and the pads (if your new pads come with clips look how the old pad spring clips fit as they only fit on one way)
clean the piston
clean then remove the brake fluid cap off the header tank
((DO NOT SPILL ANY FLUID ON YOUR PAINTWORK OR IT WILL REMOVE IT))
next reset the piston ensuring you do not damage the rubber piston seal boot
i used a g clamp but you can get a special tool to do this from most motor factors
do this slowly to give the fluid chance to move back without putting any undue pressure on the seals
now i have dropped a bo bo here and not got a photo of this step but i will try and get one when i get chance
you need to undo the caliper carrier using a 19mm socket and remove the 2x bolts
so this bit comes off
now you can get the disc off
using a T30 Torx bit undo the 2 torx aligning bolts these are commonly seized in so a bit of release oil might help and in my case a hammer and impact driver
once both are removed either the disc will drop off with a slight pull or need braying round the edge with a hammer to crack any corrosion
clean the stub axle up and coat with copper grease (makes changing them next time easier)
now get your new disc and clean it well with brake cleaner (they come coated in light oil to prevent rusting in storage)
and refit
apply copper grease to the threads of the torx bolts to make removal easier next time
refit the caliper carrier putting a drop of threadlock on the bolt threads for added security
then fit the new sping retainer clips and new pads greasing the back of them lightly (on the piston side the other side bonds in place with a sticky pad so degrease the caliper where the pad will stick
ultimately you will be left with this
19mm caliper across flat carrier bolts Torque 9.9 ÷ 11.0 (daNm)
13mm across flats caliper bolts torque to 2.7 ÷ 3.3 (daNm)
T30 torx bolts torque 0.9 ÷ 1.4 (daNm)
now refit the wheel and do the other side
check fluid doesnt over flow as you reset the piston
once the other side is done pump the brake pedal slowly with the cap off to reset the pistons then refit the cap
now start the car and pump the brakes and check they feel ok
now do several low speed stops in a quiet area to check all is working as it should
AND IMPORTANTLY DRIVE WITH GREAT CARE FOR THE FIRST HUNDRED OR SO MILES OR SO TO GIVE THE NEW PADS AND DISCS TIME TO BED IN AND GET TO FULL POWER AS YOU MIGHT FIND THEM LACKING IN BITE FOR A WHILE i know of a chap who stuffed his car into the back of another having just had his brakes done so it can happen
