The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
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 Post subject: Welding vs Bending
PostPosted: Mon Nov 25, 2019 10:06 pm 
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TDC Oxfordshire Area Organiser

Joined: Sun Oct 08, 2006 4:32 pm
Posts: 473
Hello all.
I am now working on the underside of my Sprint project and unfortunately the n/s chassis leg needs repair. I probably should replace it but the front end of the leg is very good... Tis quite a big job to replace too.
Looking at it tonight, I think I could fabricate a repair. My question though is would I be better off welding 3 plates together.. Ie two vertical and one horizontal or simply bending some steel into shape and welding on to what's left of the original vertical section? Strength is what concerns me.
Any thoughts folks?

_________________
Matt Cotton

TDC Oxfordshire Area Organiser.
TDC/TSSC group meeting - 3rd Tuesday of the month


1980 1500HL - OPD
1976 Sprint - SWU


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 Post subject: Re: Welding vs Bending
PostPosted: Mon Nov 25, 2019 10:33 pm 
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TDC Member
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Joined: Mon Jun 11, 2012 4:36 pm
Posts: 1227
Location: Andover Hants
Hi Matt

If I was you I'd try to get hold of another chassis leg and cut a suitable piece to let in.

Cheers

Tony

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Modified Dolomite Sprint MSO 662P VA485 1973 Mimosa Sprint
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 Post subject: Re: Welding vs Bending
PostPosted: Mon Nov 25, 2019 10:37 pm 
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Joined: Mon Dec 12, 2016 9:53 pm
Posts: 1710
Location: Harrow Middlesex
Matt

i would bend some 1.5mm steel to the shape of the chassis leg,to replace the whole leg is a lot of work

Dave


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 Post subject: Re: Welding vs Bending
PostPosted: Tue Nov 26, 2019 9:51 pm 
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Future Club member hopefully!
Future Club member hopefully!

Joined: Mon Dec 03, 2012 6:04 pm
Posts: 1549
Quote:
Hello all.
I am now working on the underside of my Sprint project and unfortunately the n/s chassis leg needs repair. I probably should replace it but the front end of the leg is very good... Tis quite a big job to replace too.
Looking at it tonight, I think I could fabricate a repair. My question though is would I be better off welding 3 plates together.. Ie two vertical and one horizontal or simply bending some steel into shape and welding on to what's left of the original vertical section? Strength is what concerns me.
Any thoughts folks?
A repair bent into the correct shape will be strong enough, as long as you use the correct gauge of steel. The strength of these structural sections is not just down to the material, it is also the shape. Just make sure you get all the rot out and weld it to good steel.

In some ways these repairs are easier than body work, you can put the welder on a nice high setting and get good penetration. You don't have to worry about how it looks.


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 Post subject: Re: Welding vs Bending
PostPosted: Wed Nov 27, 2019 11:18 am 
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TDC Oxfordshire Area Organiser

Joined: Sun Oct 08, 2006 4:32 pm
Posts: 473
Thanks for the info gents. Having cleaned it up further I've decided to purchase a leg from Alun and will graft that in. It looks to have had multiple repairs in the past so time to start afresh.
Image

_________________
Matt Cotton

TDC Oxfordshire Area Organiser.
TDC/TSSC group meeting - 3rd Tuesday of the month


1980 1500HL - OPD
1976 Sprint - SWU


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 Post subject: Re: Welding vs Bending
PostPosted: Thu Nov 28, 2019 3:13 pm 
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TDC Member

Joined: Mon Dec 12, 2016 9:53 pm
Posts: 1710
Location: Harrow Middlesex
Quote:
Thanks for the info gents. Having cleaned it up further I've decided to purchase a leg from Alun and will graft that in. It looks to have had multiple repairs in the past so time to start afresh.
Image
Matt

that chassis leg does look a bit ruff,be nice to see how you fit the new one

Dave


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 Post subject: Re: Welding vs Bending
PostPosted: Thu Nov 28, 2019 9:18 pm 
Offline
Future Club member hopefully!
Future Club member hopefully!

Joined: Mon Dec 03, 2012 6:04 pm
Posts: 1549
Quote:
Thanks for the info gents. Having cleaned it up further I've decided to purchase a leg from Alun and will graft that in. It looks to have had multiple repairs in the past so time to start afresh.
Image
What is the footwell above it like? With all that rot in the rail, I would give it a prod just to be safe.


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