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Unread 09-12-2009, 12:13 PM   #1
paraman72
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1985 CJ7 
 
Join Date: May 2005
Location: Whiteford, Maryland
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boxed frame idea...

Since most of the boxed frames rust from the inside out, I was thinking of a way to clean the rust and prevent the cancer. Since I had to cut off the rear crossmember I purchase a cheap chimney sweep on stealbay that I am going to trim down and run it through the frame. Then por-15 it of using the marine clean and metal ready. Whacha think about those apples.

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85 CJ7 Build in progress, 258 with T-5 and dana 300.
Fiberglass tub Raptor lined interior, rustoleum lined the underside. Modified family roll bar from fender mounted rollbar. Full tie ins to the frame soon to come.
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Unread 09-12-2009, 04:16 PM   #2
CJman77
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Yeah I did the same thing basically. But I took a sponge and tied a really long rope to it ( in the middle) and then pulled it through rear to front and back again out the rear.

But who knows how much crap I just painted over. I know the insides of my frame were bad news. I stood it up and all kinds of small rust chunks would come out. And I sand pressure washed it out. And then let it dry and phospo etched it. then did the paint trick. Cost me less then 100 bucks as opposed to the 500 I was looking at the galvanize. Although I wish it were galvanized but it is what it is.

Hopefully I have welded it back together with enough metal!
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Unread 09-12-2009, 05:07 PM   #3
jsc7002
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I thought about doing that but the frame I have is in pretty good condition and I didnt see any spots that looked like they might be weak or thin, besides when this frame starts rusting out, I will make my own frame thta is stronger and cleaner
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Unread 09-14-2009, 08:50 AM   #4
paraman72
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well hopefully by doing this the frame will outlast me...
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85 CJ7 Build in progress, 258 with T-5 and dana 300.
Fiberglass tub Raptor lined interior, rustoleum lined the underside. Modified family roll bar from fender mounted rollbar. Full tie ins to the frame soon to come.
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Unread 09-14-2009, 12:34 PM   #5
rixcj
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Quote:
Originally Posted by paraman72 View Post
Since most of the boxed frames rust from the inside out, I was thinking of a way to clean the rust and prevent the cancer. Since I had to cut off the rear crossmember I purchase a cheap chimney sweep on stealbay that I am going to trim down and run it through the frame. Then por-15 it of using the marine clean and metal ready. Whacha think about those apples.
If the brush has steel bristles, don't do it. I had the same idea.

I bought a 5" square steel bristle chimney brush, then trimmed it down, with a cutting wheel.

I trimmed, then tried it, trimmed some more, tried it, etc. When I thought I had it trimmed enough, I shoved it in the rear opening of the frame...about 4" in.

It was nearly impossible to get out!! The bristles will face the direction of the push, when entering, but do not want to reverse themselves, when you go to pull the brush back out!

Of course, I finally got it, but it was a hassle.

I ended up buying a 7pc. engine cleaning brush kit, with abrasive, nylon bristles, and shoved them into frame holes. I did the best that I could, then blew the frame out with air. Good enough.

I'm going to spray boiled linseed oil in there, and call it a day.

Rich
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Unread 09-14-2009, 02:24 PM   #6
paraman72
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would be funny driving around with a chimney brush hanging out the *** end of my frame....
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85 CJ7 Build in progress, 258 with T-5 and dana 300.
Fiberglass tub Raptor lined interior, rustoleum lined the underside. Modified family roll bar from fender mounted rollbar. Full tie ins to the frame soon to come.
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Unread 09-14-2009, 02:36 PM   #7
datmony
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Boiled linseed is a great option. That is what anyone who has steel bicycles uses to keep the in good shape. Been being done since before the turn of the century and that stuff lasts forever and a day. Good call rixcj.
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