Brake bolt question for techs/brake gurus

[CarolinaMBZ]

Just replaced front rotors on sliding calipers (W124). Do the "self-securing" caliper bolts need to be replaced or locktited? I coated with anti-seize and torqued to spec (81 ft-lbs). Am I OK?

Also, one rear piston was a little difficult to force back into the bore but I was able to get it in with extra effort? Do I need rebuild/replacement or will it be alright? I did replace fluid.

All assistance appreciated.

[Benzmac]

The bolts that hold the caliper bracket to the spindle and the bolts that hold the two halves of the caliper together should be coated with LOCTITE!!

[CarolinaMBZ]

Thanks Benzmac.

What should I do now? Also, friend and I did same thing on friends 850 Volvo with same setup? Clean bolts and coat with loctite or replace bolts?

Also, what about piston issue? Any thoughts?

Thanks.