When I was taking out the O2 sensor in my friends car it broke in side. The screw part is out but the tip of the o2 sensor got stock inside. The thead on o2 sensor look fucked up too. So I was thinking drilling whatever is left inside and maybe retaping or putting a helo coil inside. Would that work?

 

my be/ but u should replaces it eneyways

 

just weld a new bung on there and forget it.