On 8/1/2018 8:31 PM, Arlen Holder wrote:
> Car is just bought by a kid just learning to drive (he's 16).
> 2004 Mitsubishi Lancer ES
>
> Neighbors asked me to teach him how to replace the oxygen sensor (due to
> emissions code).
>
> The threads were stripped and "filled" with some kind of hardened "metal
> paste".
>
> The new part is a Denso 234-4739 (marked 485000-4060, 07U05)
> The old part is a Denso (marked 234000, 8643, 07E23)
>
> What would you suggest?
> - Tap the threads? (22mm hex nut)
> - New exhaust manifold?
>
> http://www.bild.me/bild.php?file=3234632o2sensor01.jpg
> http://www.bild.me/bild.php?file=8064061o2sensor02.jpg
> http://www.bild.me/bild.php?file=6399144o2sensor03.jpg
> http://www.bild.me/bild.php?file=1574232o2sensor04.jpg
> http://www.bild.me/bild.php?file=9418974o2sensor05.jpg
> http://www.bild.me/bild.php?file=4183674o2sensor06.jpg
> http://www.bild.me/bild.php?file=5856176o2sensor07.jpg
> http://www.bild.me/bild.php?file=3486734o2sensor08.jpg
> http://www.bild.me/bild.php?file=9694112o2sensor09.jpg
> http://www.bild.me/bild.php?file=5019152o2sensor10.jpg
>
I'm no expert on this particular situation, but perhaps a helicoil would
solve it easily.