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sclaverie

Prepping for carpet…insulation question…

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So my 2002 is a '76 and i am laying down some dynomat before the carpet. The car already has some sound/insulation material along the transmission hump (lacking a better word). First the tar time of material followed by a layer of hard cardboard type of material. The question is, should I remover the cardboard material or leave it there? What is the best option for sound proofing and a nice carpet finish?. Looking for input.

Thanks in advance for your reply.

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The tar material is all over the floor boards, under rear seat and under all the cardboard material.

when I attacked this, I scraped all the old tar off the floor using a hot air gun and a chisel, others have used the dry ice method.

Once scraped off, I cleaned the metal, removed the floor seals, cleaned around and glued them back in. I prepped the metal with rust proofing cleaners I then sprayed undercoating and then stuck dynamat over it.

I'm happy with the way it turned out..

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People will say that removing the cardboard and tar and then putting dynamat down will help but really it doesnt matter. The dynamat is acting as a dampener in a spring mass system. The car metal being the spring the dynamat being the dampener and the force input is the vibrations of the car coming from the road or engine. In a spring mass system it doesnt matter where the dampener is laid down it will still do its job. However, removing the tar is good to do to check if you have rust. As for carpet fitting it will all fit fine.

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