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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

Firewall Holes

 
  #16  
Old 10-22-2012, 07:31 PM
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Originally Posted by Doc View Post
It goes through the big hole at the top left hand corner of the passenger side toe board where it meets the vertical fire wall.
I thought I did a good job of documenting things as I took the truck apart but there seem to be a number of things that I must have thought were obvious. This is one of them. No mention in my notes or photos. Thanks for the help.
 
  #17  
Old 10-22-2012, 10:39 PM
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110 holes - now you are just exaggerating.
Only 110 holes?...sure seemed like more than that and I left the obvious ones alone...lol.
One guy says it's less, another says it's more. I must be pretty close.

I haven't bothered to count mine, yet, but I do know a guy that did once and he filled 108 firewall holes. I remember that because he made a pretty big deal of it at the time. He even wrote it on the firewall so we could all see it before it was painted. All I know is either way, it's a lot of very tedious work.
 
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Old 10-22-2012, 11:00 PM
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Originally Posted by 52 Merc View Post
One guy says it's less, another says it's more. I must be pretty close.

I haven't bothered to count mine, yet, but I do know a guy that did once and he filled 108 firewall holes. I remember that because he made a pretty big deal of it at the time. He even wrote it on the firewall so we could all see it before it was painted. All I know is either way, it's a lot of very tedious work.
I believe it. Seems like I counted something like 13 completely unexplainable holes in just one side of the frame rail during a fit of boredom one night.
 
  #19  
Old 10-23-2012, 12:28 PM
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Here's a before and after on my 49. I filled tons of holes.
Before


After
 
  #20  
Old 10-23-2012, 01:18 PM
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I've been thinking about the hole filling procedure. I was thinking would it be easier to buy plugs of say a few sizes and drill the holes to fit the plugs and weld them in or did you cut your own? I assume the smaller ones could be welded with a copper backer but that would only work with the 1/4 in or so holes right? Any advice on approaching this not so fun task when it comes up?
 
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Old 10-23-2012, 01:45 PM
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For the smaller holes I used a copper backer. For larger holes I cut small pieces of sheetmetal and tacked them into place, then welded them in.

Bobby
 
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Old 10-23-2012, 03:29 PM
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Originally Posted by bobbytnm View Post
For the smaller holes I used a copper backer. For larger holes I cut small pieces of sheetmetal and tacked them into place, then welded them in.

Bobby

Same here. I did fill some as large as 1/2-5/8" or so with a backer because trying to cut one out of scrap with a grinder was tough.
 
  #23  
Old 10-24-2012, 08:06 PM
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This is what I did to my firewall. I cut the old one out and welded this in.
 
  #24  
Old 12-01-2012, 02:43 PM
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Does anyone have a picture of a restored stock firewall with a 226 straight six engine? I'm trying to see what screws / fasteners are coming through from the interior. Is there anything other than the fasteners for the firewall insulation that come through from the inside.
 
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Old 12-01-2012, 04:19 PM
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Originally Posted by ct50f1 View Post
Does anyone have a picture of a restored stock firewall with a 226 straight six engine? I'm trying to see what screws / fasteners are coming through from the interior. Is there anything other than the fasteners for the firewall insulation that come through from the inside.
Heater box mounting studs and hose nipples from the heater core certainly would come through from the inside. And are we considering the throttle linkage which goes through from the engine side but has nuts on the inside? You've also got choke, throttle and speedo cables, vacuum wiper hose (if equipped) and all sorts of wiring.

I'm not sure if this is helpful for your year, but here's a shot of an original '48 firewall.

 
  #26  
Old 12-01-2012, 06:04 PM
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My 56 had so many holes chopped in the firewall I cut out the worst of it and put in two solid panels, then redrilled where I needed. I still ended up filling about 40 holes in the rest of the firewall and floorboard. If you can find a fabrication shop with a turret or automatic punch have them punch out a paper cup full of 1/2" - 1" blanks out of 16 and 18 ga sheet. Use a unibit to enlarge the holes to the size of your plugs. Use a welders magnet across the hole on the back side to hold the plug in place until you can put in a couple tacks then use a dolly and a hammer "on dolly" to flush and swell the plug to a tight fit. I only weld fill holes 5/16" and smaller using a copper spoon. Start the bead on top the surrounding metal not on the edge (unless you want to make the hole bigger instead of filling it ) and spiral the bead in to the center. See my Filling holes gallery for pix of the process I use.
 
  #27  
Old 12-01-2012, 07:41 PM
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Originally Posted by 52 Merc View Post
Heater box mounting studs and hose nipples from the heater core certainly would come through from the inside. And are we considering the throttle linkage which goes through from the engine side but has nuts on the inside? You've also got choke, throttle and speedo cables, vacuum wiper hose (if equipped) and all sorts of wiring.

I'm not sure if this is helpful for your year, but here's a shot of an original '48 firewall.

Thanks for the picture. It helps a lot although there are several things setup different than the way mine was before I took it apart.





As you can see, the wiper hose and choke cable go through holes in the upper right. There isn't a hole large enough for the wiper hose in the indented area in the middle where yours goes through. I don't have a heater so I don't have to worry about those. I figured out the throttle linkage but I'm having trouble picturing where the throttle cable would go through. It doesn't look like it was set up right when I got the truck.
 
  #28  
Old 12-01-2012, 07:53 PM
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Here's what it looks like after getting sand blasted. I'm trying to restore it back to stock so I'd like to fill the holes that were added by previous owners but leave the extra holes from the factory even if they weren't used for the 6 cylinder setup.



 
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Old 12-01-2012, 08:05 PM
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All of those holes look stock to me.
 
  #30  
Old 12-01-2012, 09:46 PM
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Originally Posted by 51PanelMan View Post
All of those holes look stock to me.
I'm beginning to think you may be right. Do you know what the four holes on the left side, below the the rib under where the data plate goes are for?
 

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