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Author Topic:   Frame Rot!
Dirt Freak

Total posts: 273
posted October 05, 2002 08:25 PM
I was sooo happy with my new Camaro project until tonight I found a big hole rusted in the rear sub-frame. It's darn near rusted in two! How should I go about fixing this problem? It's right over the top of the rear end housing....and I thought it was essentially a rust free car...

Dirt Full Roller

Total posts: 61
posted October 06, 2002 09:24 AM
I would cut it out from the top and put in 2x2 square tubing.. and tie it in with the rear loop... that is how my car is built.

Dirt Freak

Total posts: 273
posted October 06, 2002 02:52 PM
Thanks Pigpen, but our rules won't allow box tubing in the frame. I was thinking about it and think I can make a pattern of the subframe and build a "cap" to weld over the rusted area extending several inches past the rot on into solid metal. Ever tried this?

Dirt Full Roller

Total posts: 31
posted October 06, 2002 06:47 PM
I would check with your track's tech guy before I threw out the idea of 2X2 square as he may be lenient on you in the name of may save you some time and effort in the "engineering dept." Anyway, the answer is 'no' if you don't ask.

Dirt Roller

Total posts: 16
posted October 07, 2002 10:20 AM
I agree with the wrenchjockey

Donnie Ross
Dirt Maniac

Total posts: 109
posted October 07, 2002 04:31 PM
my first bomber was a camaro and the shop that built the cage used round tubing bent
to fit inside the rear rails used regular
tubing bender to make, then weld it in. covered back up with sheet metal no one was the wiser.

Dirt Full Roller

Total posts: 69
posted October 09, 2002 07:36 AM
I believe you can buy new frame rail pieces from the aftermarket restoration places, may be the easy way to go

Dirt Freak

Total posts: 273
posted October 09, 2002 06:31 PM
Last night I made templates of the inner and outer sides of the rusted framerails. I'd bought some plate at the local machine shop and while I was there had them shear one strip 2 3/8ths wide. I used the templates to duplicate that rotten frame onto the plate and welded the whole thing togethher, slipped it over the rotten part and welded it together. Looks good to me!
Thanks for the ideas-I knew tech wouldn't go for the tubing idea-they gave my buddy grief about some tubing between the spring hangers and the bumper.
I'll let ya'll in on my next crisis-soon as it comes up! LOL

Dirt Freak

Total posts: 298
posted October 09, 2002 07:56 PM
Tie everything together inside the car. With a support system tied together inside, it can be considered part of the cage.

Four post support low off the cage to the front spring hanger. another from the top of the cage to the rear spring hanger and supported to each other in between.

In other words build a frame inside the car. It passes at our tracks.


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