been busy with the 197 recently with lots of pictures...
My first plan was to remove and replace the seals on my calipers (due to them all being cracked), in my head i thought 1 full day on this job would suffice, however it ended up turning into 3 do to various issues - this was the most involving DIY i have done! ;
This is what i was faced with prior to removing the calipers, coated in various states of red & black paint.
I have previously checked that the caliper pins would remove ok, they would with the help of a lump hammer and a decent set of punches
Loosen / removal of the caliper bolts (M12)
Undo the brake line from the caliper
In order to clamp the brake lines i bought a pair of these - dont waste your time, they are rubbish and didnt clamp the brake line correctly
They were replaced with good old molegrip / microfibre combination
With the calipers off - i then removed the discs, the retaining bolts are made of soft metal and i had a bit of an issue removing them, managed ok on driver side but the passenger side i failed at removing 1, despite trying T40/T45/T50, it was stuck fast. I had no access to power tools so had a bit of an issue, anyway come back to that later.
Now i turned my attention the the anti rotation / lower droplinks. You need a T40 torx socket, however mine quickly snapped clean in half (halfords professional)
Thankfully they have a lifetime guarantee so after a visit to Halfords, i had a replacement
However i was now stuck as i had no way of removing the anti rotation droplink (also on passenger side!)
I moved to the drivers side and managed to undo both bolts ok , i decided to not replace this part yet though until i could do both at the same time.
with both calipers removed and 1 disc, i moved inside, old vs new disc comparison
Caliper on the table with pads / pins removed, this is what i was faced with - you can make out how mashed the dust covers where
Now, first step was to remove the dust covers before removing the pistons - I didnt have access to compressed air (which is a must!) and the foot pump failed to cut it, so after another journey to borrow an air line i had all the pistons out! Whilst at my brothers unit, we gave the calipers a liberal brushing of thinners, this had a slight effect but not as much as hoped at removing all the paint, so i then set about the painstaking task of using a stanley blade on them to remove the paint
pistons out!
I bought this drill attachement from halfords to assist with the paint removal (it helped in places)
But unfortunately the most effective way of removing the caked on paint was by hand!
After many hours they were now stripped of paint , cleaned inside and out and then the replacement seals replaced
In situ (lots of grease used!)
This was the end of day 2 (spent the 2nd day removing all paint by hand). I then began painting with Hammerite yellow, beware you need to leave 4 hours between applications, and due to my desperation to get them back on the car involved me setting my alarm for 1am to get up and give a 2nd coat (thinking 2 coats would be enough and they would be ready to go back on the 197 first thing in the morning) WRONG! the paint is very thin and they needed a 3rd coat, I am not 100% happy with the finish but given the circumstances i had to accept it.
Here is a shot of the discs being painted silver on the soon to be rusty bits, also did the caliper bolt heads
Refitted on the 197 (looking much better)
Any questions re caliper refurb, fire away!
So back to the stuck disc and seized anti rotation drop link, well this was another visit back to the brothers unit where the disc bolt was drilled out and the anti rotation drop links angle grinded off. Power tools!!