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Old 02-09-2017, 05:10 PM   #1
SierraMtns
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Where to Start? Firewall Repair

Hey Guys,

I am starting on my other cab. Planning on repairing the firewall first around the heater area. I am going to delete the heater box area. Not sure where to start?

Firewall and work my way in to the cab? Or start inside the cab inner firewall and work my way out?

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Old 02-10-2017, 07:28 AM   #2
joesscamaro
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Re: Where to Start? Firewall Repair

In my opinion, I think you should just start wherever you are most comfortable. If you haven't welded in a while, it may be easier to start on the exterior of the firewall and get into a bit of a rhythm before doing repairs under the dash. It'll be easier to dial in the welder on the right settings.
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Old 02-10-2017, 04:00 PM   #3
dennislbrooks
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Re: Where to Start? Firewall Repair

I would sandblast inside and out and see what you have.
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Old 02-10-2017, 05:07 PM   #4
SierraMtns
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Re: Where to Start? Firewall Repair

Quote:
Originally Posted by joesscamaro View Post
In my opinion, I think you should just start wherever you are most comfortable. If you haven't welded in a while, it may be easier to start on the exterior of the firewall and get into a bit of a rhythm before doing repairs under the dash. It'll be easier to dial in the welder on the right settings.
Yeah I am new to sheet metal welding. Gap or no gap? I used a copper backing plate and .023 wire.



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Old 02-10-2017, 05:08 PM   #5
SierraMtns
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Re: Where to Start? Firewall Repair

Quote:
Originally Posted by joesscamaro View Post
In my opinion, I think you should just start wherever you are most comfortable. If you haven't welded in a while, it may be easier to start on the exterior of the firewall and get into a bit of a rhythm before doing repairs under the dash. It'll be easier to dial in the welder on the right settings.
Quote:
Originally Posted by dennislbrooks View Post
I would sandblast inside and out and see what you have.
Dont really want to do this because I would like to keep the look of the old paint on the outside.
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Old 02-10-2017, 07:45 PM   #6
tinydb84
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Re: Where to Start? Firewall Repair

I'm with Joe and Dennis.

Blast and start where you are comfortable. You are going to have to grind off a lot of that paint and put in patches anyway. Not sure how much of the original paint will be there after.

I am a no gap person myself. I do my best to fit up and there is always a bit of a gap somewhere though. When I mig I weld hot tacks so it doesn't stand as proud and require a ton of grinding.

Tig

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Old 02-18-2017, 04:36 PM   #7
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Re: Where to Start? Firewall Repair

I usually gap about the width of the wire I'm using. I like the butt clamps for this, you can grind down the spacers to different widths for whatever wire you're using.

On my cab, I did all the inside stuff first, then did my firewall, but it really doesn't matter. Blasting does help - it's almost always worse than what you thought it was going to be after the sandblaster 'uncovers' everything. Anyway, could you mask off/back tape what you don't want blasted so you can keep the exterior paint like the windshield pillars, etc, and then just repaint the firewall & interior later? I would think a competent blasting place could work with you on this.
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Old 05-03-2017, 03:38 PM   #8
SierraMtns
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Re: Where to Start? Firewall Repair

Update:

Sold the white cab and found a new cab. Picked it up from a friend for $400. Now the fun starts.





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Old 05-03-2017, 03:40 PM   #9
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Re: Where to Start? Firewall Repair

Couple more pics....









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Old 05-03-2017, 03:44 PM   #10
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Re: Where to Start? Firewall Repair

Looks like a much better start. That $400 was well spent.
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Old 05-03-2017, 05:11 PM   #11
Indian113
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Re: Where to Start? Firewall Repair

Looks like you saved over $400 by buying that Cab just in Body Work!
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Old 05-03-2017, 08:04 PM   #12
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Re: Where to Start? Firewall Repair

Yeah, you done good.
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Old 05-03-2017, 08:20 PM   #13
Clatterville trolley
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Re: Where to Start? Firewall Repair

Looks like a lot nicer cab than any I have seen in a long, long time. It is for sure a keeper!
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Old 05-06-2017, 04:56 PM   #14
lks dcvn
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Re: Where to Start? Firewall Repair

Agree here - the $400 was a great deal. Those are worth several grand in Ohio.
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Old Yesterday, 07:30 PM   #15
SierraMtns
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Re: Where to Start? Firewall Repair

I have been working on my welding skills.

From the bottom up. #1 and #3 are the sittings the welder recommends.

#2 and #4 are two sittings higher on volts and one sitting higher on speed. These two have flatter welds but I am worried about the back. Looks like it is a little to hot?

What do you guys think?



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