NOS cab corners - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**jdl71** · 07-09-2016, 03:30 PM

Is there such a thing? I guessing not, since this wasn't part of the assembly process like a rocker. I've read that the repop cab corners all have to be split and put back together as they are made to slip over instead of replace the original, which doesn't make a lot of sense to me.

**special-K** · 07-09-2016, 10:56 PM

The rear corners are part of the cab back panel. I have used decent fitting corners, but not sure who made them. There are different companies making them. When a panel is the correct dimensions, same size as what you are replacing, the thing to do is step flange. That makes the better job than cheap slip over patches

**hatzie** · 07-10-2016, 01:48 AM

I butt weld stuff like this stitched up with MIG and copper body spoons where I can get to the backside. It's a skill. Take a scrap fender and slice it with your plasma cutter or cutoff tool then practice workholding and stitch butt welding the seams back together without warping them.

I only lap weld where the factory seam was a lap weld.

If you're using body panel adhesives then flanged panels may be the way to go. I'd rather butt weld em. Less filler to smooth it off so less chance of coming back to do it again later after it rusts and bubbles off the paint.

Look at the Frankenstein and Bride of Frankenstein threads.

**jdl71** · 07-10-2016, 11:35 AM

Butt welding would be my first choice, but I had read somewhere that all the repop cab corners are made to be slip on and so they won't fit without considerable work. Can't remember where I saw that but I thought it was on here somewhere.

oldpurple · 07-10-2016, 12:12 PM

I can't answer your question but I just recently fixed my cab corners and was pretty disappointed with the fit. I've never purchased patch panels before and didn't realize they were designed to be a slip on....

Splitting them is what I ended up doing.

I have pictures of my work if you're interested. Might give you some insight to what you're in for if you need to split them.

**jdl71** · 07-10-2016, 02:38 PM

Quote:

Originally Posted by oldpurple

I can't answer your question but I just recently fixed my cab corners and was pretty disappointed with the fit. I've never purchased patch panels before and didn't realize they were designed to be a slip on....

Splitting them is what I ended up doing.

I have pictures of my work if you're interested. Might give you some insight to what you're in for if you need to split them.

Yes I would like to see them. Did you do the inners as well? I'm trying to decide whether to try this myself or send it to a body shop. I've done some minimal sheet metal work before, and it turned out ok for a driver, but I want this to be a bit better than that.

oldpurple · 07-10-2016, 03:09 PM

Quote:

Originally Posted by jdl71

Yes I would like to see them. Did you do the inners as well? I'm trying to decide whether to try this myself or send it to a body shop. I've done some minimal sheet metal work before, and it turned out ok for a driver, but I want this to be a bit better than that.

Yep I did the inner as well. I think it was a bit of a better fit. It didn't have the 1" drain hole but I added one. Here's some pics.

Inner fit good. It didn't have the hole for the drain but I added one. I didn't feel like drilling all these spotwelds out so I butted it in.
http://i.imgur.com/sYUqz6s.jpg
http://i.imgur.com/yZh1eln.jpg

Here you can see how big the patch was...
http://i.imgur.com/UiU64g2.jpg

Here's where I decided to split it. I did it here because it's right over top of the inner seam of the inner cab corner. Also it was the width of a piece of masking tape from the edge...
http://i.imgur.com/M16x9rW.jpg

Tacked in. Took several hours but this thing fit extremely well in the end.
http://i.imgur.com/W3ZK8YX.jpg

Welded up.
http://i.imgur.com/ArBwxJg.jpg

Just before filler went on.
http://i.imgur.com/io159gD.jpg

Here's where I'm at. You can see the filler on the edge that I mention below.
http://i.imgur.com/vrHZgr3.jpg

I also had to trim a good 1/4" off the lip where it spot welds into the door jamb. I also had to remove a lot where it butts against the rocker.

I am a welder but I haven't done a whole lot of body repair but I believe this turned out quite well. Take your time fitting things up and it will go a lot smoother. I used a hand file to really fine tune my seams. I would say the thickest filler is around 1/16", except for on the back corner. The radius is not the same as OEM so I had to blend the patch to the cab with a bit of filler. I tried to get it to match but just didn't have the tools to do so.

I got the panels from RockAuto and they were listed as "Goodmark" which I had read good things about, but upon arrival they were "Keystone".

The drivers cab corner wasn't as bad so I didn't repair the inside. The patch also seemed to be almost the correct width at the seam, but the bottom was huge. I don't have many pics of this but I split the back of it but only half way just to make it curve like it's supposed to. I split the front a bit to get it to line up a bit better but decided to not go the whole way. As a result it isn't quite straight across the front but it's only where it meets the rocker and I will seam seal that anyways.
http://i.imgur.com/VYJ2ars.jpg

I hope all that makes some sense. My cellphone camera is pretty bad but you should get the idea

**jdl71** · 07-10-2016, 03:15 PM

That helps a ton, thanks. I was also wondering if you can repair the inner without pulling the carpet, trim, and seat out and it appears that you can. Thanks again.

oldpurple · 07-10-2016, 03:18 PM

Quote:

Originally Posted by jdl71

That helps a ton, thanks. I was also wondering if you can repair the inner without pulling the carpet, trim, and seat out and it appears that you can.

Yep I didn't remove any interior pieces. I didn't pull the tank either because I figured I could get away with leaving it in... then I ended up just removing the tank anyways. Wish I had just removed it from the start.

barry1982 · 07-10-2016, 09:42 PM

I recently installed new inner/outer cab corners on my 82. You have to be careful because there are a lot of cheap/thin replacement parts out there. I got my corners from a company called "Key Parts". They are located in the US. I don't think you can get stuff right from Key Parts, you have to find a distributor. I was very impressed with the fit, and the parts were as thick, or slightly thicker than OEM. I butt welded mine in with a Lincoln Mig welder.

07-09-2016, 03:30 PM	#1
jdl71 Senior Member Join Date: Oct 2012 Location: Eldon, MO Posts: 1,753	NOS cab corners Is there such a thing? I guessing not, since this wasn't part of the assembly process like a rocker. I've read that the repop cab corners all have to be split and put back together as they are made to slip over instead of replace the original, which doesn't make a lot of sense to me. __________________ Psalm 23 64 C10 66 K20

07-09-2016, 10:56 PM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: NOS cab corners The rear corners are part of the cab back panel. I have used decent fitting corners, but not sure who made them. There are different companies making them. When a panel is the correct dimensions, same size as what you are replacing, the thing to do is step flange. That makes the better job than cheap slip over patches __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

07-10-2016, 01:48 AM	#3
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,916	Re: NOS cab corners I butt weld stuff like this stitched up with MIG and copper body spoons where I can get to the backside. It's a skill. Take a scrap fender and slice it with your plasma cutter or cutoff tool then practice workholding and stitch butt welding the seams back together without warping them. I only lap weld where the factory seam was a lap weld. If you're using body panel adhesives then flanged panels may be the way to go. I'd rather butt weld em. Less filler to smooth it off so less chance of coming back to do it again later after it rusts and bubbles off the paint. Look at the Frankenstein and Bride of Frankenstein threads. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful. Last edited by hatzie; 07-10-2016 at 01:54 AM.

07-10-2016, 11:35 AM	#4
jdl71 Senior Member Join Date: Oct 2012 Location: Eldon, MO Posts: 1,753	Re: NOS cab corners Butt welding would be my first choice, but I had read somewhere that all the repop cab corners are made to be slip on and so they won't fit without considerable work. Can't remember where I saw that but I thought it was on here somewhere. __________________ Psalm 23 64 C10 66 K20

07-10-2016, 12:12 PM	#5
oldpurple Registered User Join Date: Feb 2005 Location: Saskatoon, SK Posts: 97	Re: NOS cab corners I can't answer your question but I just recently fixed my cab corners and was pretty disappointed with the fit. I've never purchased patch panels before and didn't realize they were designed to be a slip on.... Splitting them is what I ended up doing. I have pictures of my work if you're interested. Might give you some insight to what you're in for if you need to split them.

07-10-2016, 03:15 PM	#8
jdl71 Senior Member Join Date: Oct 2012 Location: Eldon, MO Posts: 1,753	Re: NOS cab corners That helps a ton, thanks. I was also wondering if you can repair the inner without pulling the carpet, trim, and seat out and it appears that you can. Thanks again. __________________ Psalm 23 64 C10 66 K20

07-10-2016, 09:42 PM	#10
barry1982 Registered User Join Date: Oct 2015 Location: Waskatenau, Alberta Posts: 259	Re: NOS cab corners I recently installed new inner/outer cab corners on my 82. You have to be careful because there are a lot of cheap/thin replacement parts out there. I got my corners from a company called "Key Parts". They are located in the US. I don't think you can get stuff right from Key Parts, you have to find a distributor. I was very impressed with the fit, and the parts were as thick, or slightly thicker than OEM. I butt welded mine in with a Lincoln Mig welder.



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