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Hi all, I am replacing the soft-top on my BT7 and rebuilt the wooden =
header
piece that secures the top to the windscreen. The rubber seal that goes
between the aluminum strip and the windscreen is causing me grief. The =
seal
I removed I believe is original. Although deteriorated in sections, it =
was
surprisingly good in places, so I feel I have a reasonably good example =
of
what was there. Also the ends appear to be molded in a curve to match =
the
aluminum strip, as opposed to being cut as a replacement would be.
=20
This (possibly) original seal was a solid piece of compressible foam =
rubber
about =BE=94 wide and appears to have tapered in thickness, from =BC=94 =
to 3/16=94,
although this seems unlikely. I recognize that 60 years of compression =
makes
exact measurement impossible and uneven compression may have made it =
appear
tapered in section.
=20
The replacement I got was hollow and narrower. Compressed slightly, =
enough
to just squeeze the hollow centre closed, it was =BC=94 thick. However, =
when I
installed it, the top bow would not go onto the windscreen without a =
huge
amount of effort and force, and I was never convinced it was on =
properly.
The top bow always used to fit on the windscreen snugly and with ease in =
the
past (I have owned the car for 46 years). I don=92t understand this, as =
the
new seal when compressed would seem to be the same thickness as the
original, but =93the proof is in the pudding=94 =96 it does not fit!
=20
To experiment, I cut the replacement seal to half the thickness, so it =
is
now 1/8=94 thick, and the top bow mounted on the windscreen with ease. =
So the
problem is the seal. However, I think 1/8=94 is too thin and it will =
likely
leak.
=20
The Concours Guide, Supplement 1, page 5, provides a photo of a 100 =
seal,
but it is silent on whether this seal was carried through to the BT7 or =
was
changed at some point. Does anyone know?
=20
Does anyone have any comment on the above, and more importantly a source =
for
a replacement seal that is closer to the original?
=20
With thanks, Mirek
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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
lang=3DEN-US>Hi all,=A0 I am replacing the soft-top on my BT7 and =
rebuilt the wooden header piece that secures the top to the =
windscreen.=A0 The rubber seal that goes between the aluminum strip and =
the windscreen is causing me grief.=A0 The seal I removed I believe is =
original.=A0 Although deteriorated in sections, it was surprisingly good =
in places, so I feel I have a reasonably good example of what was =
there.=A0 Also the ends appear to be molded in a curve to match the =
aluminum strip, as opposed to being cut as a replacement would =
be.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>This (possibly) original seal was a solid piece of =
compressible foam rubber about =BE” wide and appears to have =
tapered in thickness, from =BC” to 3/16”, although this =
seems unlikely. I recognize that 60 years of compression makes exact =
measurement impossible and uneven compression may have made it appear =
tapered in section.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>The replacement I got was hollow and narrower.=A0 =
Compressed slightly, enough to just squeeze the hollow centre closed, it =
was =BC” thick.=A0 However, when I installed it, the top bow would =
not go onto the windscreen without a huge amount of effort and force, =
and I was never convinced it was on properly.=A0 The top bow always used =
to fit on the windscreen snugly and with ease in the past (I have owned =
the car for 46 years).=A0 I don’t understand this, as the new seal =
when compressed would seem to be the same thickness as the original, but =
“the proof is in the pudding” – it does not =
fit!<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p> </o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>To experiment, I cut the replacement seal to half the =
thickness, so it is now 1/8” thick, and the top bow mounted on the =
windscreen with ease.=A0 So the problem is the seal.=A0 However, I think =
1/8” is too thin and it will likely leak.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><o:p> </o:p></span></p><p =
class=3DMsoNormal>The Concours Guide, Supplement 1, page 5, provides a =
photo of a 100 seal, but it is silent on whether this seal was carried =
through to the BT7 or was changed at some point.=A0 Does anyone =
know?<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Does anyone have any comment on the above, and more =
importantly a source for a replacement seal that is closer to the =
original?<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>With thanks, Mirek<o:p></o:p></p></div></body></html>
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