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07-10-2016, 09:05 AM | #1 |
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'40 firewall, what's that big hole for?
It seems that most '40 firewalls have a plug for the big hole in the center of the firewall, is that what I'm missing? Neither of the '40s I've had (such as they were) had anything there.. My '38 Plymouth (first pic) had the coil stuffed in a hole in a very similar location...
Last edited by white64; 07-10-2016 at 09:17 AM. |
07-10-2016, 09:09 AM | #2 |
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Re: '40 firewall, what's that big hole for?
[QUOTE=white64;1321486]It seems that most '40 firewalls have a plug for the big hole in the center on the firewall, is that what I'm missing? /QUOTE]
39's have that as well - I believe that was used for dealer added hot air heat supply to interior. I am not positive if correct so others will chime in and add to this. |
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07-10-2016, 10:04 AM | #3 |
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Re: '40 firewall, what's that big hole for?
Heater option.
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07-10-2016, 10:21 AM | #4 |
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Re: '40 firewall, what's that big hole for?
Thanks! Where might I find a plug? I could make one but it looks like there is more to the plug than a round disc. Tapered edges, and I would assume bolts welded to the back of it?
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07-10-2016, 10:59 AM | #5 | |
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Re: '40 firewall, what's that big hole for?
Quote:
To "replace" this, I'd suggest making a round blank to fit and welding from the rear. Or, as long as authenticity does not matter to you, how about flattening out that area of the panel, welding in a patch and finishing it smooth?
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07-10-2016, 01:29 PM | #6 |
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Re: '40 firewall, what's that big hole for?
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I'll make a disc to fit.. any welding at this point will raise hell with my checker board! Thanks again, |
07-10-2016, 01:46 PM | #7 |
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Re: '40 firewall, what's that big hole for?
Epoxy a piece in place with a backer from the inside and paint it to match.
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07-10-2016, 03:00 PM | #8 | |
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Re: '40 firewall, what's that big hole for?
Quote:
To hold in place, drill a hole in a piece of (example) 1" x 1/8" x 4" steel. Place that over the stud (beneath the dash) and mock washer and nut. Walla! No fuss, no muss and noooo welding.
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07-10-2016, 04:51 PM | #9 |
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Re: '40 firewall, what's that big hole for?
Got it, took a 2.5 inch hole saw, 1/16 plate, voila! A plug! With a centered hole! just use the two side holes (where there was a clamp for the heat tube, I guess) to support a crossbar inside, the "plug" outside, a stainless machine screw! and done!
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