[MDairheads] Exhaust Port Thread Question

[markj]

I had Randy Long weld new threaded exhaust nipples on my heads last year. He has new castings of the threaded section. Perfect welding and machining. $50 sounds right.
Mark Jones

> On August 20, 2018 at 11:12 AM Mark Singer via MDAirheads <mdairheads at casano.com mailto:mdairheads at casano.com > wrote:
> 
> 
>     I would try repairing with a thread file first, before taking a die to it. Be patient, slow and steady does win some races. Then if all else fails pay someone.
>     Good luck
> 
>     Sent from my iPhone
> 
>         > > On Aug 19, 2018, at 7:24 PM, Zwicky, Eric via MDAirheads <mdairheads at casano.com mailto:mdairheads at casano.com > wrote:
> > 
> >         I had the same issue three or four years ago and I sent it to Randy Long. He had it back to me a week later. No jive. I called him first and he said send it in. Brand-new threads for somewhere around 50 bucks.
> > 
> >             > > > On 8/19/2018 6:59 PM, Kevin Fahey via MDAirheads wrote:
> > >             Evening All,
> > >             When attempting to remove the exhaust crossover pipe to clean trust from it and the exhaust pipes, I found it was rusted solid to both exhaust pipes.
> > >             So I decided to go ahead and remove both exhaust pipes. They're pretty rusty. I also wanted to make sure they hadn't rusted into the exhaust ports.
> > >             The left side exhaust nut came off smooth as butter. Right side loosened a couple turns and then would not budge. Having paid attention to advice passed along in the prior tech sessions I've attended, I went ahead and cut the exhaust nut off rather than force it off.
> > >             Found the reason it hung up was some slight damage to a thread as you can see in the attached photo. I'm guessing it happened during a removal by a previous owner.
> > >             Looks to me like I should be able to clean it up with a die since the damage isn't too severe or too extensive. Is this the recommended course of action? If so, anybody know what size die to use and possibly a source that sells them?
> > >             Kevin
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