+ Reply to Thread
Results 1 to 13 of 13

Hybrid View

  1. #1
    Registered Member
    Location
    Irvine, CA, United States
    Member No: 25723 jsubbi is an unknown quantity at this point jsubbi's Avatar
    Join Date
    Jan 2002
    Posts
    323
    Rep Power
    0


    Yes | No

    Caliper rebuild question

    I ordered some stainless-steel pistons and new seals from Bimmerworld, but the seal is a couple of mm larger than the piston (the ID of the seal is about 62 mm and the max OD of the piston is 60 mm). The part number on the seals match the ETK and BW swears it's the right piston. Does this sound normal? It doesn't seem like it would seal.







  2. #2
    Registered Member
    Location
    , , United States
    Member No: 49533 95DayVI is an unknown quantity at this point 95DayVI's Avatar
    Join Date
    Sep 2002
    Posts
    16,858
    Rep Power
    0


    Yes | No

    abbey normal

    _______
    GC RTAB shims, RSMs, T/S Coilover with Koni DA f/SA R & 450#f/550#r Eibach ERS
    Eyeball Arm CA mounts
    Sunbelt CAMS w chip for 24# injectors, Euro MAF, Conforti/ITG CAI
    96+ exhaust manifolds
    Euro fLoAtErS, Ferodo DS2500
    accessory UDPs
    M roadster lever
    All done in my garage

    corkscrew:Laguna Seca

  3. #3
    Registered Member
    Location
    Irvine, CA, United States
    Member No: 25723 jsubbi is an unknown quantity at this point jsubbi's Avatar
    Join Date
    Jan 2002
    Posts
    323
    Rep Power
    0


    Yes | No

    Any guesses on whether it's the piston or seal?


  4. #4
    Registered Member
    Location
    , , United States
    Member No: 49533 95DayVI is an unknown quantity at this point 95DayVI's Avatar
    Join Date
    Sep 2002
    Posts
    16,858
    Rep Power
    0


    Yes | No

    only if you double check PN of either

    _______
    GC RTAB shims, RSMs, T/S Coilover with Koni DA f/SA R & 450#f/550#r Eibach ERS
    Eyeball Arm CA mounts
    Sunbelt CAMS w chip for 24# injectors, Euro MAF, Conforti/ITG CAI
    96+ exhaust manifolds
    Euro fLoAtErS, Ferodo DS2500
    accessory UDPs
    M roadster lever
    All done in my garage

    corkscrew:Laguna Seca

  5. #5
    Registered Member
    Location
    Lexington, KY, United States
    Member No: 81720 adsingl is on a distinguished road adsingl's Avatar
    Join Date
    Jul 2003
    Posts
    449
    Rep Power
    13


    Yes | No

    I'd guess seal, but see if somebody can get you a

    I've seen rubber seals expand. Funny thing is, brake fluid on the wrong type of rubber would do that, but obviously shouldn't to a brake part o-ring, but heat, or somebody stuffing the wrong o-ring in the bag with the right part number would be my number one guess.
    Get somebody to measure a piston for you. Try a racing board (where someone may have their stock calipers off from a Brembo/stoptech upgrade) or maybe visit Pelican parts site and see if somebody there can give you the diameter spec.

    Good luck.
    ADS

  6. #6
    Registered Member
    Location
    , , United States
    Member No: 49533 95DayVI is an unknown quantity at this point 95DayVI's Avatar
    Join Date
    Sep 2002
    Posts
    16,858
    Rep Power
    0


    Yes | No

    he can go to realoem and cross the #s 4 seal

    _______
    GC RTAB shims, RSMs, T/S Coilover with Koni DA f/SA R & 450#f/550#r Eibach ERS
    Eyeball Arm CA mounts
    Sunbelt CAMS w chip for 24# injectors, Euro MAF, Conforti/ITG CAI
    96+ exhaust manifolds
    Euro fLoAtErS, Ferodo DS2500
    accessory UDPs
    M roadster lever
    All done in my garage

    corkscrew:Laguna Seca

  7. #7
    Registered Member
    Location
    Lexington, KY, United States
    Member No: 81720 adsingl is on a distinguished road adsingl's Avatar
    Join Date
    Jul 2003
    Posts
    449
    Rep Power
    13


    Yes | No

    point of my post ^ is that right number ON bag can


  8. #8
    Registered Member
    Location
    Irvine, CA, United States
    Member No: 25723 jsubbi is an unknown quantity at this point jsubbi's Avatar
    Join Date
    Jan 2002
    Posts
    323
    Rep Power
    0


    Yes | No

    I have the ETK and the seal part number matches

    That's why I suspect it's the piston, but Bimmerworld swears it's the right diameter (60 mm). I've scoured the net to see if the piston size is speced, but unfortunately no luck.

  9. #9
    Registered Member
    Location
    Irvine, CA, United States
    Member No: 25723 jsubbi is an unknown quantity at this point jsubbi's Avatar
    Join Date
    Jan 2002
    Posts
    323
    Rep Power
    0


    Yes | No

    I posted this qestion on serveral sites

    but no luck. I'm just going to have to pull my caliper and mesure the piston this weekend. I'll let you know what I find out.

+ Reply to Thread


Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Bookmarks

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
1e2 Forum