Seems I have a pinched thread on this valve.

[Ulfhedinn]

Usually I would right this off as a loss but since Its a Halcyon valve I'm gonna figure out a way to fix. Ideas? I am going to a local "tap and die" mechanic shop to see if the can fix.. if there is not an easier way.

 

[Brant Emery]

You should be able to fix that with a thread file.

 

[Ulfhedinn]

First time using one of those, recommended size? and TY

 

[Brant Emery]

Thread files have 8 different thread pitches, one file for Metric, one file for SAE.

They are available from McMaster-Carr, and many other retailers.

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

You might be able to find them at a local auto parts store.

 

[Gone for diving]

I don't really like thread files, they have a time and place,
in this case, patience and a small 3 cornered file will do the trick, (valve clamped in a bench vice )

FYI it will not be chrome right there after you're done, and for sure not if you use a die,

 

[Ulfhedinn]

I don't really like thread files, they have a time and place,
in this case, patience and a small 3 cornered file will do the trick, (valve clamped in a bench vice )

FYI it will not be chrome right there after you're done, and for sure not if you use a die,

I'm guessing that it would still be alright once it back in the cylinder though???

 

[Bob DBF]

I don't really like thread files, they have a time and place,
in this case, patience and a small 3 cornered file will do the trick, (valve clamped in a bench vice )

Considering it's brass, I might look around the shop for the right piece of steel, and try to stand it back up a bit, to minimize the filing.

 

[lowwall]

Considering it's brass, I might look around the shop for the right piece of steel, and try to stand it back up a bit, to minimize the filing.

Exactly. You can probably get that thread to stand back up with a flat head screwdriver and some judicious levering and mallet work.

If you have to take it to someone, see if they have the right size hinged or split thread chaser. It gets clamped on above the damaged thread and wound off to restore the thread without removing metal.

 

[rjack321]

If you feel like spending a little coin the die comes in handy for stuff like this. The tiny fleck of chrome you'll remove isnt structural.

The hex type die will fit in a vice. You can get a die in the 3/4" x 14 size easy breezy.

 

[Ulfhedinn]

If you feel like spending a little coin the die comes in handy for stuff like this. The tiny fleck of chrome you'll remove isnt structural.

The hex type die will fit in a vice. You can get a die in the 3/4" x 14 size easy breezy.

3/4" x 14 is in the cart! TY