John loftus bj7 restoration firewall insulation

[robert_ellison]

In one of the restoration photos it shows a 3 piece firewall insulation which appears to go at the top of the firewall where the components pass through the gromets. In other completed firewall photos this insulation is not visible nor is it shown in any catalogs I have seen nor was it available on my bj7 when I bought it.

Could you please give me information so I know if I am missing something or if it is a modification.

Robert

 

[John Loftus]

Re: John loftus bj7 restoration firewall insulatio

Hi Robert,

The original interior firewall insulation was a type of black tar paper (aka 30 lb.roofing felt) which can be purchased in roll form at a building supply store. This same material was used on the flat sections of the floors as a first layer before carpet felt and carpet. My BJ7 still had the original insulation in the center section but the outside pieces had fallen off but the contact cement type glue residue was evident. British Car Specialist has it in their catalog but is fairly easy to make yourself. I suggest you use a piece of thin cardboard first to mark and cut the holes and then mark/cut the holes in the tar paper (felt).

If you aren't going for originality, many people use dynamat or other types of insulation.

Cheers,
John

p.s. here's links to some pictures .. to make sure we are talking about the same thing.

tar paper

tar paper installed

 

[robert_ellison]

Re: John loftus bj7 restoration firewall insulatio

Thanks for the info, John.

Robert

 

[John Loftus]

Re: John loftus bj7 restoration firewall insulatio

A few more tips ..

Note that the holes are appreciable larger than the grommets/holes in the firewall. You want the material to lay flat when glued up and have a little margin of error when gluing with no overlapping of grommets.

As you can see in the first picture, I used large hole punches (bought an inexpensive set at Harbor Freight) for most of the holes and a circle cutter that holds an exacto type blade (bought at an art supply store) for the larger circles.

Cheers,
John

 

[anthony7777]

Re: John loftus bj7 restoration firewall insulatio

john, great stuff, from whom did you purchase the exterior heat shield "white panels in engine bay" - a7777 /bcforum/images/%%GRAEMLIN_URL%%/savewave.gif

 

[Keoke]

Re: John loftus bj7 restoration firewall insulatio

john, great stuff, from whom did you purchase the exterior heat shield "white panels in engine bay" - a7777 /bcforum/images/%%GRAEMLIN_URL%%/savewave.gif

----- /bcforum/images/%%GRAEMLIN_URL%%/savewave.gif
-----------------Home Depot!!------------------------Keoke- /bcforum/images/%%GRAEMLIN_URL%%/laugh.gif

P.S. Virginia got em too all cut out nice.--- /bcforum/images/%%GRAEMLIN_URL%%/laugh.gif

 

[John Loftus]

Re: John loftus bj7 restoration firewall insulatio

yup .. home depot is where I got the HardiBacker board. You may need to search to find the plain type (one side smooth and one side with a light weave pattern). They have another type with grid pattern cuts which wouldn't look so good.

Cheers,
John