RX7Club.com - Mazda RX7 Forum - And so it begins....

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- 1st Generation Specific (1979-1985) (https://www.rx7club.com/1st-generation-specific-1979-1985-18/)

- - And so it begins.... (https://www.rx7club.com/1st-generation-specific-1979-1985-18/so-begins-1008856/)

OneRotor

08-19-12 06:05 PM

And so it begins....

OneRotor

08-19-12 06:16 PM

OneRotor

08-19-12 06:19 PM

OneRotor

08-19-12 06:24 PM

http://i265.photobucket.com/albums/i...r/IMG_1308.jpg

http://i265.photobucket.com/albums/i...r/IMG_1282.jpg

So there it is. I've found some pretty bad cancer. I have a 12" x 12" 1/8" plate that I'm going to be making reinforcement pieces out of for the two suspension pick up points. I have two 24" x 24" 16ga sheets to make an inner and an outer wheel well for the drivers side. I'm about $65 into materials. I am paying a welder $75/hour to weld everything into place this coming Saturday. I'll keep this updated with the progress of my cleaning, fabricating, and the final results from the repairs.

Qingdao

08-19-12 09:43 PM

Good luck man!! I'm rooting for you cause thats a mighty big hole!

Sgt.Stinkfist

08-20-12 02:16 AM

damn, crazy theres that much rust hiding away in there based on the outside appearence...looks clean on the outside. My front and rear of the rear wheel wells as well as a touch of upper 4 link mount rot has been discovered ( similar to you passenger side 4 link mount on both sides) yet i havent seen any fender/quarter panel rot show up :scratch: good luck, i hope you post lots of pics , as i will be tackling some of the similar issues soon

Qingdao

08-20-12 03:01 AM

Quote:

Originally Posted by Sgt.Stinkfist (Post 11194277)

Rust is like roach infestation. You see one roach... There are 1 000 waiting in the dark; you just have to flip on the lights to see them.

But where there is a MIG there is a way. :lol:

Kentetsu

08-20-12 05:50 AM

Good luck Steve. I'm afraid to look too closely at mine. Maybe I'll be inspired by your efforts. :)

.

OneRotor

08-20-12 07:28 AM

Quote:

Originally Posted by Kentetsu (Post 11194350)

Good luck Steve. I'm afraid to look too closely at mine. Maybe I'll be inspired by your efforts. :)

.

Steve? Mark, it's Jim over in Ann Arbor....

I'm going to be working on my wheel well tonight and tomorrow night, and then the reinforcement plates for the suspension parts the following days. I have until Saturday at 9am to get everything fabricated, and then it's off to Belleville, MI to pgfwelding.com to have everything put in place.

-Jim

Kentetsu

08-20-12 07:30 AM

lol, sorry Jim. Lack of sleep aolong with another friend named Steve White got me off on the wrong track. :)

OneRotor

08-21-12 07:41 AM

OneRotor

08-21-12 07:42 AM

http://i265.photobucket.com/albums/i...r/IMG_1319.jpg

http://i265.photobucket.com/albums/i...r/IMG_1320.jpg

Tonight is a lot of time with the grinder, cutting out my parts.

OneRotor

08-22-12 07:55 AM

After 1.5 hours with the grinder and 4 wheels:

http://i265.photobucket.com/albums/i...r/IMG_1321.jpg

Since I don't have the skills to hand-form the steel (nor the time to learn before 10am Saturday), here is my process of making a wheel well that fits well:

1: Mark every 1/2" along the edge of the steel (1/2" from the edge) and center punch with a prick punch:

http://i265.photobucket.com/albums/i...r/IMG_1324.jpg

Tools:

http://i265.photobucket.com/albums/i...r/IMG_1322.jpg

Drill a 1/8" hole at each punch location:

http://i265.photobucket.com/albums/i...r/IMG_1323.jpg

http://i265.photobucket.com/albums/i...r/IMG_1325.jpg

To get the shape that I'm looking for, I'm using a box of #10 x 1.25" and my 12V Hitachi Impact gun (760 inch-pound of torque).

http://i265.photobucket.com/albums/i...r/IMG_1328.jpg

http://i265.photobucket.com/albums/i...r/IMG_1327.jpg

http://i265.photobucket.com/albums/i...r/IMG_1329.jpg

http://i265.photobucket.com/albums/i...r/IMG_1330.jpg

http://i265.photobucket.com/albums/i...r/IMG_1331.jpg

OneRotor

08-22-12 07:57 AM

http://i265.photobucket.com/albums/i...r/IMG_1332.jpg

I'm starting to get the curvature that I need. It was about 9:30 when I got done last night, and I am at a point where I need to trim a bit by the rear shock mount, so I called it a night. Tonight I'm going to *hopefully* finish up my Drivers side wheel well, and then it's on to final grinding on my suspension reinforcement parts.

Jeff20B

08-22-12 12:32 PM

Wow, that's a hundreds of screws! Or bolts, rather. Looks like something I might have done back before I had access to a cheap welder.

Something seems a bit off about this, or just kinda odd, you know? Like a way to cheat - to get the curvature you're looking for without having an english wheel or a simple hammer and soft backing pad. Heck even your leg or a bunch of towels works to hammer against. But I understand how each successive screw can pull a little more on the sheet to get it to the right shape so you eventually end up where you want to be by the time you're done. But all those screws? That's a lot of work. Good thing they're self tapping...

I hope the structure isn't weakened futher by all those screws, you know? Meh, maybe I'm way off here. It's kinda early still. Good luck.

OneRotor

08-22-12 02:59 PM

Quote:

Originally Posted by Jeff20B (Post 11196834)

I'm going to have the welder run beads inside and outside of the car, and then weld all of the holes up. Plus, the tiny bit of metal lost to all of the holes won't have any affect on the strength of the area. I don't have access to a bead roller, so I'm not going to be able to replicate the factory strengthening ribs. However I don't see that as a big loss, since the factory piece was just spot-welded into place. This is going to have a bead around the whole part, which will give me a lot more strength.

Yes, it's a bit of time to do everything (I'm pre-drilling a 1/8" hole through the 16 gauge), however it'll look smoother and more "factory" when all is said and done, rather than me farting around with a hammer and dolly. I'll play around with my other sheet of 16 gauge after I get everything fabbed up and see if I can't pound out a decent fender.

Qingdao

08-22-12 04:53 PM

Any structure will be more sound than gaping rust holes :O

EDIT:
but I agree... time with a hammer would be well spent.

jeremyferguson4444

08-23-12 06:26 AM

Keep up the good work. Can't wait to see pictures of her all back together in one piece! I remember that sinking feeling about 17 years ago when I was poking around a rust "bubble" on the wheel well of my '79 and I just kept hearing cracking noises and my finger kept pushing through the paint that was holding the back half of the car together. I'm still "recovering" from that.

If its any consolation, I would rather fix "underbody" rust any day...she'll be better than new soon!

OneRotor

08-23-12 07:29 AM

So I realized last night that I was trying to work 14 gauge, not 16 gauge steel. I realized this while heating and hammering the fender I was trying to shape. I broke some ribs 3.5 weeks ago, and this upset them, so I gave in for the night. I'm going to spend some time with poster board tonight and hopefully come up with a nice blank that I can take to the welder and have him bend into place as he runs a bead.

I finished my drivers side reinforcement plate (save for the hole saw that I still need to buy), and am almost done with finish grinding on my passenger side reinforcement plate (again, no hole saw yet...).

BuBBaStuBs

08-23-12 09:11 AM

Could you just cut off the link holder and weld on a new custom made one?

OneRotor

08-23-12 09:41 AM

Quote:

Originally Posted by BuBBaStuBs (Post 11197708)

Could you just cut off the link holder and weld on a new custom made one?

It's not that bad.

BuBBaStuBs

08-24-12 03:36 PM

All together the car looks in decent shape though, hope you can get it done soon.

OneRotor

08-26-12 06:48 PM

OneRotor

08-26-12 06:55 PM

http://i265.photobucket.com/albums/i...r/IMG_1347.jpg
http://i265.photobucket.com/albums/i...r/IMG_1348.jpg

http://i265.photobucket.com/albums/i...r/IMG_1349.jpg

So there it is. $225 in welding, $65 in materials, plus 3-5 hours a night this past week, all day last Saturday, all day yesterday and today to get to this point. i'm going to work this week to paint everything, undercoat everything, and get everything reassembled. Once that is done, it's racing with Furrin group next weekend, then possibly putting her up for sale.

Qingdao

08-26-12 10:10 PM

You couldn't resist poking the tape on the gas cap could you? lol

Nice job and good luck with the paint.

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