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Old 09-04-2013, 05:19 PM   #1
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Default Xray T3 Chassis Repair

Couldn't figure out where else this might fit, so here we go.

I inherited an Xray T3 and it appears that at some point a stripped screw was drilled out from the underside of the chassis. In the process of drilling out the head, the countersink in the CF was damaged and the hole is now a little deeper than it was originally.

Understanding that A) replacing the chassis plate is not an option and B) I'm not a good enough driver to notice a very minor tweak, how might I go about fixing this problem? I was thinking about using an epoxy to build the material back up and redrilling to get the countersink back where it belongs.

Any thoughts?
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Old 09-04-2013, 05:33 PM   #2
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Sounds A-ok to me. A buddy of mine just sealed it with a bunch of CA glue and kept driving it. I took over the car from him and didn bother getting a new one myself and don't notice anything.
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Old 09-04-2013, 09:53 PM   #3
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Thanks. I'll go shopping for some JB Weld and a countersink bit now.
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Old 09-05-2013, 12:55 PM   #4
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I would not use JB weld or CA glue, it could still crack under stress or fall apart when you start grinding it again.

I used to work in a PCB shop and we would repair laminates as well (prepreg/fiberglass). There were few times when our operators would drill the wrong size countersink (60 degree vs 90, etc.)

To repair, we used high temp kapton tape on bottom of the board (opposite of countersink, fill up the hole with high temp epoxy. Then let it cure in oven. (Use recommend cure temp settings for epoxy). Then it will harden up quite nice and be really durable. You can drill and countersink it after that. This is the strongest method we used so the hole/countersink will not deform later or break.
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Old 09-05-2013, 03:45 PM   #5
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Thank you. Good information! I'll give it a shot.
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Old 09-05-2013, 07:49 PM   #6
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I really dont think you would notice any difference in handling. But maybe post a pic. Could be way worse than i think.
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Old 09-05-2013, 08:54 PM   #7
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Hey Valk. Yeah, the screw hole is punched up almost all the way through the chassis plate. A very generous guy has contacted me and offered to help me out with some replacement chassis parts. Looks like the best option. Thanks for the advice though.
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Old 09-05-2013, 09:14 PM   #8
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you could always drill out the other side and use it for a "flexy" chassis option
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Old 09-06-2013, 10:19 PM   #9
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Default Chassis fix

You'll need some "hotstuff" or any of those "fast" glues, preferably thin, some q-tips and some baking soda.

Take two q-tips and moisten them, use one and give it a light coat of super glue, and swirl it in the reamed hole. Take the other q-tip and roll it in the baking soda, then swirl it in the reamed hole. Let the glue/baking soda setup...it won't take long.

Repeat the process until you get a little smaller hole than what you want, use a dremel angled grinding stone to clean up the oversize and tapered countersunk hole.

This stuff will setup like concrete once it dries, I've done 1/12th chassis repairs like this forever.
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Old 09-06-2013, 11:07 PM   #10
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I thought CA set almost instantly when exposed to water. Weird. I've never actually had anyone describe the process before. People just referred to "the baking soda and glue" trick. I've tried my own methods, but it was never quite right. Thanks for the correction!
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Old 09-12-2013, 08:16 PM   #11
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Quote:
Originally Posted by Johnny Wishbone View Post
You'll need some "hotstuff" or any of those "fast" glues, preferably thin, some q-tips and some baking soda.

Take two q-tips and moisten them, use one and give it a light coat of super glue, and swirl it in the reamed hole. Take the other q-tip and roll it in the baking soda, then swirl it in the reamed hole. Let the glue/baking soda setup...it won't take long.

Repeat the process until you get a little smaller hole than what you want, use a dremel angled grinding stone to clean up the oversize and tapered countersunk hole.

This stuff will setup like concrete once it dries, I've done 1/12th chassis repairs like this forever.
Johnny is the man when it comes to fixing 12 scale. I have seen it done on t/c also. works real good.

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Old 09-12-2013, 08:59 PM   #12
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Quote:
Originally Posted by Phoenix82 View Post
Johnny is the man when it comes to fixing 12 scale. I have seen it done on t/c also. works real good.

Nick K
Indeed. Seen and ran many a repaired chassis from Puff Daddy.
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Old 09-12-2013, 10:29 PM   #13
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I'm going to have to get around to actually doing this, soon.
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