Is there anything i should do apart from disconnect the battery so it dosent damage any electrical compoments.

cheers

 

nah i only ever disconect the earth terminal

 

Same here

John

 

I'd disconnect the ECU just to be safe, especially with tig welding but even mig i'd still do it.

 

cheers

 

Definitly disconnect the ECU when TIG welding

John

 

Keep the earth on the welder nice and close to the job, as the elastic trickery will always take the shortest route... Is another good one to keep in mind.

 

get one of these
http://cgi.ebay.co.uk/Welding-Vehicle-Spoke-Surge-ECUs-Battery-Protector-Kit-/260597046381?pt=UK_BOI_Electrical_Test_Measurement _Equipment_ET&hash=item3caccb5c6d

disconnecting the battery is a no no as it will act like a sponge when connected and can help prevent voltage spikes from damaging electrical components so you are more likely to do damage with it disconnected

if tig welding i would also disconnect the engine ecu as a failsafe only if it easy to get to but i tig weld on cars daily and rarely disconnect them as i use a surge protector like above and disconnecting ecu's can add a lot of labour to the job because dont forget people only think of disconnecting the engine ecu but forget that most cars have 10 or more ecu's these days for abs, central locking etc.... and to disconnect them all is a major job as a lot of them are hidden behind dashboards etc...

in 3 years of tig welding cars 6 days a week i have never yet spiked an ecu

 

As above really as all ecu's are designed to accept a high amount of transient electrical noise.

Not much point disconnecting the ecu unless you are welding on the engine or transmission.

The best advice I can give is to make sure the welder earth terminal is as near to the point of welding as possible.

 

I just disconnect the battery and ecu to be on the safe side although have done the odd bit of welding to rally cars and the like and just left em running