guys,
i have a powdercoated exaust manifold and i need to drill an EGT sensor bung. i am not familiar with powdercoat and i do not know how to do it without damaging the area.
the manifold is SSteel and came powdercoated by mistake. i wanted it bare SS.
now what can i do? is it posible to weld something upon powder? then how do i repair the welded area?
can i remove the coating and just polish the Stainles steel?
how do i remove the powdercoating?

the powdercoating is silver color. do anyone have any experience on how durable is that coating? could it be burned with the high heat with the time?

thanks
please i need your advice.
achilles

 

It's probably ceramic coat and not powder. Cerama-chrome most likely. Powder coat would melt/burn off almost immediately if it were to be used on any exhaust part.

To be honest, I'd be shocked if it was actually powder coat, as it would take such a remarkable combination of idiocy to accomplish without someone saying something about it being a bad idea.

I know there are chemicals that can strip powder coat, but I don't know how to strip ceramic coating. Anyone else care to chime in?

 

hi,
i hope the same. the mani came from a reputable builder unfortunately by misunderstanding.
if it is ceramic , can i weld something and the repair the spot? what can i do? strip the whole part?
thanks

 

If I were you I would use a grinder to remove the coating from the area where you want the EGT bung installed and have someone weld in the bung. If the surrounding area is dramatically effected by the welding heat then you probably have powder coat, if not then it's probably ceramic coat. From there, you can decide if you want to have the part re-coated or not.

Can you contact the person you got your manifold from to find out if it's powder or ceramic?

If it's powder coat then you can buy a chemical stripper.
http://www.columbiacoatings.com/Indu..._p/pstrp32.htm

If it's ceramic then you're going to have to send it to someone to either strip it or re-coat it. Ceramic coat is very tough stuff and is designed to NOT come off. The only way I've seen someone remove ceramic coat was to heat the part with a torch till it's red hot and then sand blast it with aluminum oxide.

 

you should consult the builder of your manifold.

 

sounds like this is a single turbo manifold. It's got to be a ceramic coating..... The EGT bung - Drill the probe hole. Carefully with a dremel tool or other small grinder remove the coating around the hole to allow the bung to be welded with a 1/16" TIG appled fillet. If all is stainless I wouldn't worry about recoating.....

If it's power coating it all needs to be removed. Take it to the machine shop and have them shot blast it.....

 

thanks guys,
i contacted the builder but i have no responce yet.
if it is doable to weld i dont mind.

anyway, can this ceramic coatings on maniffolds hold the heat well?gets yellow or black with the time?


thanks!