Exterior moulding bolts

Discussion in 'E9 Projects and Restorations' started by GRKOALA, Jan 19, 2018.

  1. OCCoupe

    OCCoupe Well-Known Member

    View My Showcase
    Messages:
    1,267
    Likes Received:
    303
    Trophy Points:
    83
    Location:
    PG, CA
    If I had to grind the heads on a bolt to make it work I would send it and the rest of them out to be plated. I would not paint them and I would not take a chance on not having any rust protection.

    As for the rubber disc that goes over the washer/nut all, every e9 that I have dismantled had them. Alan's is no exception. If they were missing then someone removed and didn't replace them or the car was so old and crusty that they rotted off.
     
    HB Chris, sfdon and Markos like this.
  2. Stan

    Stan Well-Known Member

    View My Showcase
    Messages:
    5,407
    Likes Received:
    431
    Trophy Points:
    83
    Location:
    Newmarket, New Hampshire
    I bought those T bolt and nuts with the rubber part from La Jolla Independent
     
  3. HB Chris

    HB Chris Well-Known Member Site Donor $

    View My Showcase
    Messages:
    10,420
    Likes Received:
    1,133
    Trophy Points:
    113
    Location:
    Huntington Beach, CA
    Stan, That was a long time ago!
     
  4. w. chen

    w. chen Member

    Messages:
    98
    Likes Received:
    7
    Trophy Points:
    8
    Location:
    los angeles, ca
    Hi all. I can vouch that my 74 do have the rubber ends. I had all the chrome trimmings replaced back in 93. Sad, but I did scrimp on not buying new bolts. Anyways, the bolts were not badly rusted and were re used with the rubber n nuts. Back in those days, I paid a ‘fortune’ for the trimmings but no foresight in thinking that the hardware should be replace too.
     
    Markos likes this.
  5. HB Chris

    HB Chris Well-Known Member Site Donor $

    View My Showcase
    Messages:
    10,420
    Likes Received:
    1,133
    Trophy Points:
    113
    Location:
    Huntington Beach, CA
    Thanks for setting the record straight!
     
  6. rsporsche

    rsporsche Well-Known Member Site Donor $$

    Messages:
    7,049
    Likes Received:
    895
    Trophy Points:
    113
    Location:
    Atlanta, GA
    maybe the rubber is still on the inside of the fenders + doors on Alan's coupe ... just the bolts came off
     
  7. GRKOALA

    GRKOALA Peter K Site Donor

    Messages:
    108
    Likes Received:
    1
    Trophy Points:
    18
    Location:
    South Australia
    How did you go, Any update on the bolts?
     
  8. sfdon

    sfdon Well-Known Member

    Messages:
    4,290
    Likes Received:
    609
    Trophy Points:
    113
    Location:
    sfbay area
    It appears......

    The new trim matches the new bolts.
    The new bolts with old trim will not assemble.
    I have ordered bolts from the dealer to see if they have changed also.
    More to come.
     
    GRKOALA and Markos like this.
  9. eriknetherlands

    eriknetherlands Active Member

    Messages:
    560
    Likes Received:
    197
    Trophy Points:
    43
    Location:
    Netherlands, Eindhoven area
    Hi;
    just in case the non BMW fastener doesn't work; I came across a supplier in Germany, Raymond that sells to automotive manufacturers 10.000 standard clips and fasteners.
    They have some things that could perhaps replace the belt line trim bolts

    For this, I'm trying to identify the thread diameter (M5 I guess?) and the band width that would applicable to the size of the head when selecting a fastener from a standard parts catalogue.
    (i'm not putting effort trying to find bolts to match the reportedly ill fitting W&N reproduction belt trim line)

    Can anyone confirm the following dimension that I gathered from this thread:
    1.15 mm head thickness
    16 mm thread length
    Cross section of head is 7 mm.

    other questions:
    - the original bolt has an oblong, (not round, but more like two half circles) head shape. What size is it in long an short direction?
    - If anyone has an original belt trim at hand, could they please confirm the width of the channel at location of the head of the bolt, and the width of the channel where the thread of the bolt passes through?

    Erik.
     
    Last edited: Feb 8, 2018
  10. rsporsche

    rsporsche Well-Known Member Site Donor $$

    Messages:
    7,049
    Likes Received:
    895
    Trophy Points:
    113
    Location:
    Atlanta, GA
    Erik,

    the measurement of the cross section of the head is about 7mm and is 1mm thick (could be 1.15mm) ... the overall length of the bolt is 16mm. i did not measure the bolt width, but i'm guessing its M4 as the dimension between the thread + edge of head is more than 1mm.

    the short direction width of the head of the bolt is 7mm. the long dimension is longer, but i didn't measure that. if nobody pops up with answers, i can check all of the dimensions when i get home tonight as i have a set of loose belt trims and t-bolts and nuts. in addition to the channel width in the belt trim, the other critical dimension is the opening width to put the bolt into the channel.
     
  11. rsporsche

    rsporsche Well-Known Member Site Donor $$

    Messages:
    7,049
    Likes Received:
    895
    Trophy Points:
    113
    Location:
    Atlanta, GA
    Erik

    the head of the bolt is nominally 7mm x 9mm. the head has 1mm bevels on each of the long sides. the bolt is 4 mm wide, so M4. the overall length of the bolt is 16 mm from top of head to bottom of machine screw.
    the slot in the belt trim is nominally 4.5 mm wide at the edge along the body. the opening to put the bolt in is 8mm wide.
     
    Markos and sfdon like this.
  12. restart

    restart Well-Known Member

    Messages:
    1,048
    Likes Received:
    132
    Trophy Points:
    63
    Location:
    KANADA, Roberts Creek, BC
    I came across these and thought of this thread. BMW used quite a few sizes of f these. Maybe one fits?
    62CEC1D2-E03B-4FF4-AC5D-BC257883B79D.jpeg
     
  13. Markos

    Markos Well-Known Procrastinator Staff Member Site Donor $$

    View My Showcase
    Messages:
    7,531
    Likes Received:
    1,868
    Trophy Points:
    113
    Location:
    Seattle, WA
    I measured the belt line trim. There is zero wiggle
    room. The slot is 7.13mm at the widest point, and 5.84mm at the most narrow point. The bolt pass through is 4.32mm. The holes on the body are closer to 5.6mm, giving you a lot of flexibility with alignment.

    DEC732D1-F96F-4660-9EC2-EDF1574BC74C.jpeg
     
    autokunst likes this.
  14. eriknetherlands

    eriknetherlands Active Member

    Messages:
    560
    Likes Received:
    197
    Trophy Points:
    43
    Location:
    Netherlands, Eindhoven area
    Thanks,
    Perfect info guys!
     
  15. Rex Kapriellian

    Rex Kapriellian Active Member

    Messages:
    346
    Likes Received:
    37
    Trophy Points:
    28
    Location:
    Long beach california
    How many T bolts does it require to put the trim all around the car and is it useef anywhere else?
     
  16. rsporsche

    rsporsche Well-Known Member Site Donor $$

    Messages:
    7,049
    Likes Received:
    895
    Trophy Points:
    113
    Location:
    Atlanta, GA
    i believe its 45. not to my knowledge is that bolt used elsewhere on the coupe.
     
  17. Rex Kapriellian

    Rex Kapriellian Active Member

    Messages:
    346
    Likes Received:
    37
    Trophy Points:
    28
    Location:
    Long beach california
    Ouch. Carl from La Jolla just confirmed that. Just ordered the bolts, Nuts and tephlon washers.
     
  18. Rex Kapriellian

    Rex Kapriellian Active Member

    Messages:
    346
    Likes Received:
    37
    Trophy Points:
    28
    Location:
    Long beach california
    The T bolts are not cheap...
     
  19. Koopman

    Koopman Well-Known Member Site Donor

    Messages:
    1,586
    Likes Received:
    140
    Trophy Points:
    63
    Location:
    Uxbridge,Ma
    Hi guys.
    I know I mentioned this before. Before my health issues and before giving my car to my son,I ordered plastic nuts and flat head bolts and ground two sides of the bolt heads square making them easy to slide in the rear of the moulding. No chance of scratching or rusting at all. Now that my son who I call "the perfectionist" owns the car chances are he removed them and made stainless steel bolts to match the originals. Being Director of Engineering at Bose Corp. he can usually reproduce almost any part on the car.
    Sorry not trying to brag.
     
  20. Koopman

    Koopman Well-Known Member Site Donor

    Messages:
    1,586
    Likes Received:
    140
    Trophy Points:
    63
    Location:
    Uxbridge,Ma
    Hi guys.
    I know I mentioned this before. Before my health issues and before giving my car to my son,I ordered plastic nuts and flat head bolts and ground two sides of the bolt heads square making them easy to slide in the rear of the moulding. No chance of scratching or rusting at all. Now that my son who I call "the perfectionist" owns the car chances are he removed them and made stainless steel bolts to match the originals. Being Director of Engineering at Bose Corp. he can usually reproduce almost any part on the car.
    Sorry not trying to brag.
     
  21. Koopman

    Koopman Well-Known Member Site Donor

    Messages:
    1,586
    Likes Received:
    140
    Trophy Points:
    63
    Location:
    Uxbridge,Ma
    Hi guys.
    I know I mentioned this before. Before my health issues and before giving my car to my son,I ordered plastic nuts and flat head bolts and ground two sides of the bolt heads square making them easy to slide in the rear of the moulding. No chance of scratching or rusting at all. Now that my son who I call "the perfectionist" owns the car chances are he removed them and made stainless steel bolts to match the originals. Being Director of Engineering at Bose Corp. he can usually reproduce almost any part on the car.
    Sorry not trying to brag.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice