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Thread: Hood bump stops

  1. #21
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    9,004

    My VIN:    03572

    Well I got my 8-32 form tap and was able to tap my first attempt. And I can machine the rubber using high speed turning and very light cuts. So I think I'm going to be using this for my car. I like the thicker rubber padding and know it should last.

    All I can think of with the problem tapping that 304 SS is when I drilled the hole it "work hardened" the SS. I tried to heat it and cool it fast and even tried cooling slow but I still could not tap it using the normal cutting tap. Anyway, I bet using a form tap for aluminum would be great since you don't get chips and would not have to keep backing out the tap to clear chips.

    So this SS is a little discolored from my heating when I tried to soften the metal.

    I'm thinking of maybe using a bigger bolt for the engine cover bumps so I can use the same rubber bumpers for those.
    Attached Images
    Dave M vin 03572
    http://dm-eng.weebly.com/

  2. #22
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    9,004

    My VIN:    03572

    Interesting tidbit. My drivers side OEM bump stop is 37 mm long. The passenger side is 50 mm. I wonder if this is normal on all of our cars.

    Now I see why Ed's parts were to short when I tried it in the passenger side.
    Last edited by Bitsyncmaster; 03-25-2023 at 02:16 PM.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  3. #23
    Senior Member
    Join Date:  Nov 2019

    Location:  Pittsburgh, PA

    Posts:    504

    My VIN:    Yes.

    Club(s):   (DCO) (DMA) (DCUK)

    I just installed the DGo ones, but Chris Miles has yet another style for both hood and engine cover.

    https://dmctalk.org/showthread.php?1...By-Chris-Miles

  4. #24
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    9,004

    My VIN:    03572

    I do think the passenger side was always 50 mm long and the drivers side 40 mm. I had to cut my new one for it not to bottom out on the drivers side. The parts list does show different part numbers but it says 2 of each in the parts list.

    Maybe it's just some VINs that require the two different lenghts.
    Dave M vin 03572
    http://dm-eng.weebly.com/

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