Hi all I've put new discs and pad all round on my Audi a3 but when doing the rear I could get them piston back in even with wind back tool I had resovoir cap of and I even undon nipple but still wouldn't go back in . I had to take the rear calipers completely of and give them to my friend to help he said one caliper went in ok but the other was really hard and had to use pry bar and grips to wind it in he has said they will be ok , just wanted second appinion do think they will be alright and please any help would be greatfull on how to bleed the breaks myself thanks