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 Fixing a bad npt hole on regulator 
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Joined: Sun May 12, 2013 5:21 am
Posts: 319
Location: Michigan
Ok got an alum BG bypass reg that leaked from go because when they tapped it 1/8 npt the hole was too big n oblong or something and it didn't thread about a 1/4-1/5 of the hole. I replaced the reg with another brand and set it aside for fixing another day when I needed it and I'll need it maybe this summer.

First I got out an 1/8npt tap and tried to just sink the almost flush plug some, but the tap ran into the inside center port so I'd have to cut the tap or get a shorter one but idk if they do short for npt cause the taper.

So then I was thinking weld it up but figured it'd prob warp and then not seal at the top, then I'd have to re-flatten it and that's not impossible. Still I'd like to maybe just fix it myself and I'd have to get a guy to weld it anyway.

Now I'm thinking just drill it out n tap it to a larger setscrew that's not npt, but I only got about 3/16 of material. So I'd have to drill it then tap it only a size just a bit larger.

Figured I'd see if anyone has some advice or another option I haven't thought of.

Here is a pic http://static.speedwaymotors.com/RS/SR/ ... 1021_L.jpg

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Sun May 01, 2016 6:50 pm
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Joined: Tue Jul 30, 2013 1:48 am
Posts: 29
Figure out the next size up ORB fitting and change to that, Not the "ideal" method but doable for a hack at home if its just a leakage issue.


Sat May 07, 2016 7:49 am
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Joined: Sun May 12, 2013 5:21 am
Posts: 319
Location: Michigan
phill wrote:
Figure out the next size up ORB fitting and change to that, Not the "ideal" method but doable for a hack at home if its just a leakage issue.



Thx for your post, didn't think of O-ring fittings.

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Sat May 07, 2016 2:38 pm
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