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Heli coiling brake calipers

Tj 0785 Aug 28, 2017

  1. Tj 0785

    Tj 0785 Well-Known Member Silver Supporter VCDS Map User Bronze Supporter Audi S3

    IMG_2033.PNG IMG_2034.PNG I Might need some brake calipers helicoiling anyone recommend any for the job? Apparently if you thread the nipple in it just pulls out of one and as you can see the other the nipple has snapped
    Last edited: Aug 28, 2017
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  3. IanPG

    IanPG Well-Known Member Team Nogaro Blue Audi S3

    d'oh! someone got too happy with the spanner

    Should be able to use a bolt extractor.... they're not in there too tight
  4. A19quattro

    A19quattro Active Member

    I have had this done before and I have to say I was delighted despite some people (mechanics) saying it should not be done on brakes. I certainly got someone who had done it before (a mechanic) and he was confident it would be safe and in my ownership of the car, it never gave me any problems.
    This I should say was on a 2002 8l which decided after 20,000 miles, first brake pad change, to strip three guide pin threads on the front calipers. There was nothing much about second hand so we were looking at new Audi parts, which was expensive as you probably can guess.
  5. Tj 0785

    Tj 0785 Well-Known Member Silver Supporter VCDS Map User Bronze Supporter Audi S3

    I've not bought them yet was not sure if it's was safe to heli coil calipers. He wants £250 for them like that but I can get a non broken pair for £300 so unless he drops the price I don't think I will bother with them
  6. A19quattro

    A19quattro Active Member

    Yep, I think you are right, no harm telling the £300 guy there's a set for sale for £250, wouldn't mention the Heli coils though, he won't need to know that :)
  7. SamHendry

    SamHendry Active Member

    The cheaper set might end up costing the same as the other calipers by the time you bought helicoils/ stud extractors and on top the hassle of doing it and assuming the repair actually works, personally I would lean towards the more 'expensive' ones.
    snowy likes this.
  8. snowy

    snowy Active Member


    those calipers look in poor condition
    Bet a good chance the caliper pins will need replacing, piston seals too
    not to mention paint stripping and repainting
    ~ all extra cost and time

    £250 way too much imho
  9. Mario

    Mario Active Member TDi quattro Audi A4 S tronic S-line owners group Manual

    Helicoiling them is easy. I did it on my Brembo calipers when the aluminium thread stripped on the bleed nipple. Just drill VERY slowly. Apply some grease to the drill bit and put a bit of tissue down into the "V" seating area at the bottom so that swarf cannot get inside the caliper.

    Only drill until you get to the bottom of the threads, do not go past this point, otherwise you will damage the seating / sealing surface at the bottom and it will never be fluid tight ever again.

    Once drilled, run the tap down, cut the helicoil to size and thread it in. Remove the "tang" of the coil with needle nose pliers. Job done!!

    There is no reason not to do it, despite what some mechanics say. The threads do not form any part of the sealing surface. All the sealing is done by the cone "V" shaped part at the bottom which you do not want to touch.

    All the threads do is hold the nipple in place and the new stainless steel threads of the helicoil were certainly far, far stronger than the aluminium ones on my Brembo Calipers.

    However if you can pay £300 for a good set then why bother paying £250 for a set that needs work? Helicoil kit alone costs circa £35 - £40!
  10. Alex C

    Alex C Well-Known Member VCDS Map User Audi S3

    I'd grab the pair for £300 if they look OK. I had my Brembos repaired with Timeserts last year - look to have done a good job (haven't fitted them yet)

    As above, i think you'll find the cost of getting that pair up to a reasonable condition will push you past your £300 option
  11. Tj 0785

    Tj 0785 Well-Known Member Silver Supporter VCDS Map User Bronze Supporter Audi S3

    Yeah I'm not going to bother if I could get them for £200 than might be worth it
    IanPG likes this.
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  13. hendo#1

    hendo#1 Active Member

    I found when restoring my brembo calipers that you only get one shot at anything thats seized.

    So apply plenty of heat to any nipples, pins etc and get them out first attempt.
  14. Stuart B

    Stuart B Well-Known Member

  15. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User TDi quattro Audi A4 Audi Avant Owner Group

    I bought some Brembo LCR calipers for my TT. They looked pretty good on the EBAY auction pictures and had actually been rebuilt with new seals and hardware recently. However the nipples hadn't and I snapped one off.
    Fortunately it was the inboard one and you can bleed the caliper with just the outboard nipple by holding it upside down to allow the air to move to the outboard part of the caliper.
    Worked for me on the one caliper, pedal is nice and firm with no issues.
    Better off spending a bit more money on a good set than hoping to fix a rubbish set. The pair I bought cost £300 with virtually new MTEC discs.
  16. tcg

    tcg Well-Known Member


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