# Modify o2 housing,  welding advice needed

**URL:** <https://forums.speedlife.net/t/modify-o2-housing-welding-advice-needed/89619>\
**Category:** SON240sx Automotive\
**Created:** [October 21, 2005, 8:40am UTC](https://forums.speedlife.net/t/modify-o2-housing-welding-advice-needed/89619 "2005-10-21T08:40:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Uniac](https://avatars.discourse-cdn.com/v4/letter/u/34f0e0/32.png) [@Uniac](https://forums.speedlife.net/u/Uniac)\
**Post date:** [October 21, 2005, 8:40am UTC](https://forums.speedlife.net/t/modify-o2-housing-welding-advice-needed/89619/1 "2005-10-21T08:40:21Z")

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here’s a q for BAS and the other welders.

need to weld a peice of steel into my z31 o2housing to fix this stupid wastegate…stupid 7 bolt o2 flange. The wastegate is located inside the o2 housing. Need to cut that part off,face it, make a plate and build a custom downpipe off of it. Much like titan did here: ![http://img318.imageshack.us/img318/4830/turbo25lr.jpg](http://img318.imageshack.us/img318/4830/turbo25lr.jpg) But because of the shitty design and to make it easier to make a new o2 housing to mate up with my exhuast, i’m going to divorce the wastegate and o2 housings.

I’ve heard rumor it’s cast steel not cast iron. If i weld in a peice to seperate the wastegate from the turbo outlet, is it goign to crack?

I’m going to head over to the shop and fire up the tig.