Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Body - Exterior> Frame Rust-trap
User Name
lost password?   |   register now

Thread: Frame Rust-trap Reply to Thread
Send Trackbacks to (Separate multiple URLs with spaces) :

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
01-04-2011 07:39 PM
ant_8u Here are some images of the outriggers

I'll take some photos when I get to my car over the weekend

Note, the side facing downwards in the image will face forwards when fitted to the chassis

You can see only half of the outrigger is boxed in and there are holes at the top, bottom, front and back faces of the outrigger

Should I weld up these holes and reroute the fuel and brake lines, or should I fit grommets/bungs into the holes?

01-04-2011 07:31 PM
ant_8u I was thinking of powdercoating the chassis and all the running gear - what do you think?

Could I get a finish at least as good as the red car shown above if I went with pc?

If I do choose pc'ing should I strip the inside of the outrigger myself prior to welding it in place?

I guess if I got it blasted there would be media stuck in the box section which could be a problem

Although, if I did weld up the holes in the outrigger first that shouldn't be an issue?.....weld up the holes, epoxy inside the box section, weld outriggers to mainframe, then get blasted and pc'd??
01-04-2011 06:20 PM
Old Fool Looks to me like it was untreaded metal, the front tires throw road salt into and onto the steel. Rust wins.

I would suggest cleaning all the rust you can get off the frame by blasting and or dipping. Then SPI epoxy to the interior areas of that outrigger, then weld shut those round holes then SPI epoxz the complete frame
01-04-2011 05:35 PM
ant_8u The rest is just surface rust

Luckily that's not the chassis I'll be using, it's a spare I have, but it gives a good idea of what I need to prepare against
01-04-2011 05:23 PM
matts37chev is the rest of the frame ok ?
that looks pretty bad
01-04-2011 05:19 PM

01-04-2011 05:11 PM

01-04-2011 04:55 PM
ant_8u Yep, that's it, parts 13 & 14

They're butt welded front and back and (I think it's called) lap welded top and bottom as the top and bottom have a lip which extends onto the main frame

The outrigger is a box section, but has holes running through it for the fuel lines

The holes obviously trap water, and sits in between the outrigger and mainframe where it rots through

I don't have access to my car to take pictures, but I'll see if I've got any on my phone which I can post
01-04-2011 04:45 PM
st3gamefarm I think the rust factor begins with the quality of steel used in the frame.
and ends with the way the parts are welded on.
If you're referring to the parts numbered 13 and 14 in your pic, I would think that they can be butt welded top and bottom. I guess they are attached with rosettes, or spots? that would allow water to get between the mating surfaces.
You'll need to do something about the tension, and compression flanges though.
01-04-2011 04:23 PM
ant_8u Not sure if this picture is any good

01-04-2011 04:19 PM
Frame Rust-trap

My '71 Triumph GT6 (like every other ever made) needs the chassis outriggers replacing

This part of the frame is a notorious rust trap

I think it might be down to how the outrigger is fitted to the chassis
It's a box section, with the vertical faces butt welded to the main chassis frame, and the horizontal faces overlapping the main frame

The main frame tends to rot through where the upper and lower faces overlap the chassis main frame

Is the rotting due to poor preparation under the two surfaces?

Could the overlaps be removed and all four faces be butt welded, or would this reduce strength too much?

The outriggers are located underneath the firewall, so need to have as much strength as possible

(I'll try to add a picture if possible)

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 08:24 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.