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Thread: Gas Flap Hood Corners Too High

  1. #11
    Senior Member
    Join Date:  Feb 2013

    Location:  FL

    Posts:    948

    My VIN:    Early

    I'm eventually going to try the sanding body tub thing. I have maybe an inch worth of washers stacked on front fenders.


    Oh the joys of having one of the first 500 cars..
    Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3

  2. #12
    Motors about after dark Michael's Avatar
    Join Date:  May 2011

    Posts:    4,784

    My VIN:    Banged your VIN'S mom

    Moving the latch down will make the problem worse. Watch this video I made a few years ago starting at 3:50
    It explains my thoughts and fixes.
    Shimming fenders and moving the catch is old guard Jerry rig fixes. People just blindly followed and accepted it when you only needed to use a little common sense.



    PS: If you watch the whole video, I mispoke about the heat gun temps on correcting the fascia temps...I meant the heat gun got 1,500 degrees, not make the fascias that hot.
    Last edited by Michael; 01-13-2023 at 06:03 AM.
    http://dmctalk.org/image.php?type=sigpic&userid=90&dateline=161808992  9

  3. #13
    Senior Member
    Join Date:  Feb 2013

    Location:  FL

    Posts:    948

    My VIN:    Early

    Quote Originally Posted by Michael View Post
    Moving the latch down will make the problem worse. Watch this video I made a few years ago starting at 3:50
    It explains my thoughts and fixes.
    Shimming fenders and moving the catch is old guard Jerry rig fixes. People just blindly followed and accepted it when you only needed to use a little common sense.



    PS: If you watch the whole video, I mispoke about the heat gun temps on correcting the fascia temps...I meant the heat gun got 1,500 degrees, not make the fascias that hot.
    Yeah the factory seal is a POS. I got rid of that awhile ago.

    You say picking the hood up at the corner doesn't do it, but it does for gas flap cars. The whole thing flexes like a wet noodle because there's less meat reinforcing it at that corner.

    Now I do agree on your lowering latch theory, because that made my hood worse over the years. IMO, the real fix would be dual hood latches at corners, but I don't feel like redesigning that part of the car right now lol.


    In any case, the issue is much more pronounced on my early vin, and I attribute that to the body tub and gas flap hood imperfections. I?m going to experiment sometime this year and report back.
    Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3

  4. #14
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    9,008

    My VIN:    03572

    My problem is the fenders are also up to high because the door is to low. I moved my door front latch all the way up that it can go but still the front fenders need to go lower to line up with the doors.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  5. #15
    Senior Member
    Join Date:  Feb 2013

    Location:  FL

    Posts:    948

    My VIN:    Early

    When I was talking about hood warpage, I'm referring to how ALEXAKOS fixed the hood shape. https://dmctalk.org/showthread.php?7...anel-alignment

    Kind of extreme.
    Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3

  6. #16
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    9,008

    My VIN:    03572

    Mine is just a little high on the drivers side. I used a sheet of paper to test where and how much the seal hits and it seems the seal is the problem. It locks the paper tight when closed and all other locations I can still pull the paper out. Problem seems to be at the curved area surrounding the gas fill area.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  7. #17
    Senior Member mhanch's Avatar
    Join Date:  Sep 2019

    Location:  Renton, WA

    Posts:    123

    My VIN:    10332

    Club(s):   (PNDC)

    (still better panel gaps than a Tesla)

  8. #18
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    9,008

    My VIN:    03572

    What is the purpose of these. They do not hit the hood bumps.
    Attached Images
    Dave M vin 03572
    http://dm-eng.weebly.com/

  9. #19
    Senior Member
    Join Date:  Feb 2013

    Location:  FL

    Posts:    948

    My VIN:    Early

    Quote Originally Posted by Bitsyncmaster View Post
    What is the purpose of these. They do not hit the hood bumps.
    Those are what Dave T was referring to. Those catch the bump stops and prevent the hood from decapitating you in the event of a front end collision.
    Early 81 5spd conversion- DMCH Ground Effects, Double Din, Custom Instrument Cluster, QA1 Suspension, 3.0 PRV with MS3

  10. #20
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    9,008

    My VIN:    03572

    Quote Originally Posted by 81dmc View Post
    Those are what Dave T was referring to. Those catch the bump stops and prevent the hood from decapitating you in the event of a front end collision.
    That makes sense. But I would not think those bump stops could stop much force.
    Dave M vin 03572
    http://dm-eng.weebly.com/

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