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  • 29 firewall seal

    With my work light in the engine compartment, inside the car I checked the firewall for "leaks". I was surprised to see lots of light along the seam where the firewall bolts together. Is there a factory seal missing? With everything together, I imagine it will be difficult to insert a seal. Perhaps a careful application of silicone caulk?

  • #2
    I use double sided friction tape and use a machinists rule to make sure both mating surfaces are reasonably flat. Rod
    Rowdy

     Banished  Badge Holder

    Last edited by Rowdy; 10-30-2017, 01:25 PM.
    "Much of the social history of the Western world, over the past three decades, has been a history of replacing what worked with what sounded good." Thomas Sowell

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    • #3
      Originally posted by slammin View Post
      With my work light in the engine compartment, inside the car I checked the firewall for "leaks". I was surprised to see lots of light along the seam where the firewall bolts together. Is there a factory seal missing? With everything together, I imagine it will be difficult to insert a seal. Perhaps a careful application of silicone caulk?
      originally there was NO seal, remember these were all new parts and fit together perfectly. nothing was used back at the factory and i don't recall hearing of any complaints on squeaks, I would as rowdy says use today friction tape when ever metal hits metal to avoid anything...
      Ill., Region MARC & MAFCA
      MARC JSC Member
      2022 Morgantown National Co-Chair
      National Facebook Admin.

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      • #4
        Ya know, I was thinking about the same thing the other day and wondered to myself, why not use Gorilla tape across the inside seam. Should work well as that stuff hooks up better than the duct tape. Just needs a bit of cleaning first to be sure it has a clean surface.
        You wana look waaay far up da road and plan yer route because the brakes are far more of a suggestion than a command!

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      • #5
        Friction tape would be used IF he was going to dis-assemble the two halves, I would think the gorilla tape on the inside flat where it can't be seen. JMO
        Paul in CT

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        • #6
          Since the car is painted and assembled, short of a clear caulk, I won't be putting anything between the joint. I need something almost invisible. I'll look into Gorilla tape. I hope they make something close to Vagabond green.

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          • DaWizard
            DaWizard
            Grumpy Senior Member
            DaWizard commented
            Editing a comment
            If you put it on from the inside, no one will see it unless they stand on their head!

            That's not to say you won't go braggin about what a wonderful job ya did sealin up da crack!
            DaWizard
            Grumpy Senior Member
            Last edited by DaWizard; 10-30-2017, 08:10 PM.

        • #7
          Gorilla tape is pretty strong stuff and it make take your paint off when removing it. How about a little thin strip of dumb-dumb inside? This can be pressed into the crack and wiped clean afterwards you wont even see it.
          Just a couple more thoughts to throw on the pile
          3 ~ Tudor's
          Henry Ford said
          "It's all nuts and bolts"


          Mitch's Auto Service ctr

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          • #8
            I was going to post the dum-dum idea also. If I did anything, that's what I'd use. I never drive my cars in the cold weather, so I wouldn't worry about a small opening. Our roads are already white with road salt, so no more old car driving for the next 6 to 7 months.

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          • #9
            Where can you buy dum dum today ?
            Ill., Region MARC & MAFCA
            MARC JSC Member
            2022 Morgantown National Co-Chair
            National Facebook Admin.

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          • #10
            Originally posted by Mark Maron View Post
            Where can you buy dum dum today ?
            Menards has a similar putty in the electrical department. It's used to seal the holes where wires enter a wall or box.
            I think auto parts stores sell a 3M product that comes in long thin strips.
            In the 70's I installed several aftermarket A/C units in cars, and a handful of dum-dum always was included in the kit.

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