[Diy_efi] Welding on cars w/ ECU's??

[Clint]

J,

Oxyacetylete IS welding if they are using high heat and welding rods.  The 
major difference between welding and brazing (someone step in here if I 
screw this up) is that in welding, you heat the parts being joined together 
hot enough that they melt and flow together.  The rod adds filler material 
to build up the join.  In brazing, only the brazing rod (a bronze 
composition if my memory is working) actually melts.  The parts being 
joined are very hot, but they do not melt.  The brazing rod flows around 
the parts being joined, locks them together and fills the joint.

Due to these differences, a welded joint is stronger, but it is easier to 
braze parts and you can join dissimilar parts with brazing much easier than 
you can with welding.

The welding shop is using welding rods and they are fully welding your 
exhaust system together.  If they aren't, I would have issues.

Clint

At 03:05 PM 1/31/2003 -0600, you wrote:
>muffler shops (around here, anyway) rarely use anything but oxyacetylene 
>torches. no electrical/emi/rfi concerns. I suppose that's not really 
>welding, though. (brazing)
>
>-----Original Message-----
From: Toyota Supra [mailto:turbosupramk3 at hotmail.com]
>Sent: Friday, January 31, 2003 2:44 PM
>To: diy_efi at diy-efi.org
>Subject: Re: [Diy_efi] Welding on cars w/ ECU's??
>
>
>i am interested to hear explanations to this as well, although from what i
>have been told, you really should not TIG weld (or square wave weld) at all
>on the car, whether the cables are connected to the battery and chassis or
>not.
>it can also damage sensors as well
>
>-j
>
>
>
>
>
> >From: "Chris Spies, ATI ProCharger" <proddev at procharger.com>
> >Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
> >To: <diy_efi at diy-efi.org>
> >Subject: [Diy_efi] Welding on cars w/ ECU's??
> >Date: Fri, 31 Jan 2003 14:26:33 -0600
> >
> >Can anybody explain to me why it is you can not (at least the aftermarket
> >manufacturers prefer that you not) weld on a vehicle while the ECU is
> >connected (electrically) to the vehicle?  It seems that muffler shops weld
> >on vehicles with factory ecu's all day long without trouble, however I have
> >heard many horror stories of damaged aftermarket ECU's and ignition boxes
> >when somebody neglected to disconnect the harnesses?  I have never really
> >been given a good answer, I just follow the rules and hope to avoid
> >disaster...
> >
> >-thanks
> >-Chris
> >_______________________________________________
> >Diy_efi mailing list
> >Diy_efi at diy-efi.org
> >http://www.diy-efi.org/mailman/listinfo/diy_efi
>
>
>_________________________________________________________________
>MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*.
>http://join.msn.com/?page=features/virus
>
>
>_______________________________________________
>Diy_efi mailing list
>Diy_efi at diy-efi.org
>http://www.diy-efi.org/mailman/listinfo/diy_efi
>
>_______________________________________________
>Diy_efi mailing list
>Diy_efi at diy-efi.org
>http://www.diy-efi.org/mailman/listinfo/diy_efi


_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi