Marcos Maniacs

MarcosManiacs,

Does anybody happen to have a picture of how / or what attaches to 
the bottom of the firewall that attaches the fresh air intake to the 
heater box?  Is it just some sort of bracket that attaches a hose or 
is there some sort of plenum?  On my car the Smiths heater box  is 
mounted over a 6 inch hole that is cut in the firewall but I cannot 
see where anything was attached to the hole in the firewall.  

Another item that i am concerned about is the master cylinder box.  
When I purchased my car I discovered that large amounts of heat would 
blow through the large hole in the firewall where the pedals come 
through.  I solved this problem temporarily by stuffing foam rubber 
around all the edges of the box.  Once I did this the car became 
almost comfortable to drive.  What solutions have other members of 
the group come up with to seal this area of the firewall?

Bob Magnotti
1600 Gt #5179

I also had problems with the large hole through the
firewall by the pedals. This was fine in the UK but
became insufferable in the southern california
sunshine, with no air conditioning. I stuffed
fibreglass around the edges of the box (more durable
than foam) but have not yet found a permanent
solution. I have often pondered on fashioning some
kind of boot to wrap around the pedals to block the
airflow, but it's so difficult to work down in the
footwell area once everything is assembled.
Any other suggestions are welcomed

Andrew Jones #8422
--- Bob Magnotti <rhdspritemk1@...> wrote:
> MarcosManiacs,
> 
> Does anybody happen to have a picture of how / or
> what attaches to 
> the bottom of the firewall that attaches the fresh
> air intake to the 
> heater box?  Is it just some sort of bracket that
> attaches a hose or 
> is there some sort of plenum?  On my car the Smiths
> heater box  is 
> mounted over a 6 inch hole that is cut in the
> firewall but I cannot 
> see where anything was attached to the hole in the
> firewall.  
> 
> Another item that i am concerned about is the master
> cylinder box.  
> When I purchased my car I discovered that large
> amounts of heat would 
> blow through the large hole in the firewall where
> the pedals come 
> through.  I solved this problem temporarily by
> stuffing foam rubber 
> around all the edges of the box.  Once I did this
> the car became 
> almost comfortable to drive.  What solutions have
> other members of 
> the group come up with to seal this area of the
> firewall?
> 
> Bob Magnotti
> 1600 Gt #5179
> 
> 
> 
> 


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Hi
The first thing I did was wrap my headers in Thermo-Tec (a heat barrier
material). 
Dave (5006)

> -----Original Message-----
> From:	andrew jones [SMTP:mrjorrocks@...]
> Sent:	Wednesday, August 29, 2001 6:54 AM
> To:	MarcosManiacs@yahoogroups.com
> Subject:	Re: [MarcosManiacs] Heater questions again plus master
> cylinders
> 
> I also had problems with the large hole through the
> firewall by the pedals. This was fine in the UK but
> became insufferable in the southern california
> sunshine, with no air conditioning. I stuffed
> fibreglass around the edges of the box (more durable
> than foam) but have not yet found a permanent
> solution. I have often pondered on fashioning some
> kind of boot to wrap around the pedals to block the
> airflow, but it's so difficult to work down in the
> footwell area once everything is assembled.
> Any other suggestions are welcomed
> 
> Andrew Jones #8422
> --- Bob Magnotti <rhdspritemk1@...> wrote:
> > MarcosManiacs,
> > 
> > Does anybody happen to have a picture of how / or
> > what attaches to 
> > the bottom of the firewall that attaches the fresh
> > air intake to the 
> > heater box?  Is it just some sort of bracket that
> > attaches a hose or 
> > is there some sort of plenum?  On my car the Smiths
> > heater box  is 
> > mounted over a 6 inch hole that is cut in the
> > firewall but I cannot 
> > see where anything was attached to the hole in the
> > firewall.  
> > 
> > Another item that i am concerned about is the master
> > cylinder box.  
> > When I purchased my car I discovered that large
> > amounts of heat would 
> > blow through the large hole in the firewall where
> > the pedals come 
> > through.  I solved this problem temporarily by
> > stuffing foam rubber 
> > around all the edges of the box.  Once I did this
> > the car became 
> > almost comfortable to drive.  What solutions have
> > other members of 
> > the group come up with to seal this area of the
> > firewall?
> > 
> > Bob Magnotti
> > 1600 Gt #5179
> > 
> > 
> > 
> > 
> 
> 
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>

Hi Bob,
The attachment for the heater ducting for my car is out of the car 
sitting on the work bench so I will take a picture of  today and post 
it tonight. It is a flat plate with a short piece of 3 inch round 
"tubing" brazed to it.  No big thing and could be replicated easily.  
The early Marcos cars (Like mine)had a fiberglass box that completely 
enclosed the pedals sealing out all the heat.  The box had a lid for 
servicing the master cylinders.  I'll take a picture of that and post 
it this morning because the car is at home (the heater attachment is 
at the hanger)

Mike Denman
1966 Marcos 1800 
Chassis # 4079--- In MarcosManiacs@y..., "Bob Magnotti" 
<rhdspritemk1@y...> wrote:
> MarcosManiacs,
> 
> Does anybody happen to have a picture of how / or what attaches to 
> the bottom of the firewall that attaches the fresh air intake to the 
> heater box?  Is it just some sort of bracket that attaches a hose or 
> is there some sort of plenum?  On my car the Smiths heater box  is 
> mounted over a 6 inch hole that is cut in the firewall but I cannot 
> see where anything was attached to the hole in the firewall.  
> 
> Another item that i am concerned about is the master cylinder box.  
> When I purchased my car I discovered that large amounts of heat 
would 

> blow through the large hole in the firewall where the pedals come 
> through.  I solved this problem temporarily by stuffing foam rubber 
> around all the edges of the box.  Once I did this the car became 
> almost comfortable to drive.  What solutions have other members of 
> the group come up with to seal this area of the firewall?
> 
> Bob Magnotti
> 1600 Gt #5179