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Heat/Air mounting on a 73
#1
New to the site told to repost here so here I go. When putting the heater/air cond. box back in it seems I have an extra hole in the firewall or I am missing something.I have one stud on the heater/air box and one on the blower box , but there is another hole on pass. side firewall by the grommet that hold the insulation that don't have anything in.I don't see anything broke of the heater box or a sign that something was removed.Maybe there is something else that mounts here?Would appreciate any help.


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#2
Sorry, can't help you with your question as my car is not local to have a look at. I did want to jump in though and say NICE WORK!
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#3
I just went and looked at some used a/c set ups.
There are 2 stud / brackets on the box and 1 on the blower for 3 holes total
Don

Ohio Mustang Supply
440-949-2556

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#4
Mine is non AC but do you happen to have a chance of taking some pictures about your specific question?... Maybe if the guys see the extra hole you are talking about, can tell you what goes there...

Also, a very good "tool" for a total restored car and the steps you need to put everything back together is the 1973 Ford Car Shop Manual that you can search it in the net and buy a downloadable version for 15 to 20 bucks...

I did that with mine and there are a lot of things i now know i did it wrong!! je!!... I´m on my way to redo a lot using this manual as a Bible here! Tongue

Seriously, i suggest you try to incorporate pictures that actually shows what are you asking, it is going to be much easier to find the way to answer you Fever!

We keep in touch!!



Damián Cool

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#5
you might be missing one of the rubber holding plugs for the firewall insulation.

can you take a picture of where the hole is ?

my memory is the fan unit has 1 mount through the firewall, 2 in the front to the dash frame, the one in the front bottom supports the floor vent deflector. The air box has 2 that go to the firewall and one that goes below the Cowl intake hat.

3 mounts for the air box.
[Image: 100_1209.jpg]
[Image: 100_1210.jpg]

you can see the fan firewall mount here
[Image: 100_1208.jpg]


now the firewall plugs are these rubber plugs that hold the firewall insulation in place.
[Image: 681961.jpg]
http://www.mustangsunlimited.com/itemdy0...=681961+01

They are Ripe BASTARDS to install unless you pull out the entire dashboard.
if you are missing some and that explains your extra holes here is a tip for installing them

grease them up, and put a long bolt inside you will see the rubber is actually threaded inside, make sure the bolt is just long enough to leave the tip of the plug free to compress put a wide washer on the bolt so the load is spread on the plugs face, then place it inside the hole and ram it home with a flat screw driver on the bolt face. chances are it will go half way in and you might be able to grab it with a long nose pliers and grab the top of the plug to get it to seat correctly and not fall out. once the plug is seated, unscrew the bolt from the rubber plug. you might need a partner to keep the rubber from turning as you remove the temporary support of the bolt. be careful when you do RAM it home, you can punch out the firewall if your alignment is off.



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#6
I will get pics. of my Heat/air box this weekend with the "extra" hole in the firewall.I have the book already but the exploded view of this does not help.
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#7
i remember something else the 3 holes for the mounts are elongated to allow some movement and adjustment.

is the extra hole just round or elongated? if its round that would be for one of those rubber plugs. shine a flashlight through and see if it lines up with the firewall insulation.

for all the firewall mounts the firewall insulation is cut back except where those plugs go, the rubber plugs hold the insulation in place.
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#8
It is the round hole under the gromet hole on farthest left if looking from the frount of car .I think it must be a bracket for the heat/air box but mine is not there.Stangit72 had a pic of the box but not complete so the part I woul be missing was not in his pic either.I don't know if you can make out the hole I am talking about in the pic.Stangit72 was going to try and get a pic of the complete box today.


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#9
Well my friend... i found a picture of my cowl where if you zoom in to regular picture size you can see that in that hole goes another heater stud...

I remember this one pretty well because when i was doing the mounting, this stud got loose from the heater case.... a pain in the *** to tie the nut!!

Mine is a 1972 heater, no AC so i dont know if this really help you but if the case is the same, then you lost that stud in the process... the heater body should tell you there used to be a bolt there..

Hope it helps!

   



Damián Cool

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#10
Fever 73;27910 Wrote:It is the round hole under the gromet hole on farthest left if looking from the frount of car .I think it must be a bracket for the heat/air box but mine is not there.Stangit72 had a pic of the box but not complete so the part I woul be missing was not in his pic either.I don't know if you can make out the hole I am talking about in the pic.Stangit72 was going to try and get a pic of the complete box today.

Far left, under the hole for the insulation fastener, is for a stud on the box. Mine was missing also. I fabricated a sheet metal bracket with a stud tack welded to it, riveted the sheet metal to the box. It was a PITA to get the placement right but it worked. I looked but can't find a picture of the "fix".
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