How to remove Seized Din Insert

[JahJahwarrior]

I'm not quite as smart as Tom, but I was going to say, impact guns don't provide a constant force, they provide tons of tiny whacks of force. I've seen them get off some things that were very tight, and it's like magic.

If it wasn't for oxygen use, I'd spray some penetrating oil on it, then use an impact, with the forward then reverse trick. Of course, clean with simple green before using, but no need to disassemble from tank or anything.

If all else fails, then you throw a DGX valve on it, nothing lost.

I don't think I've ever stripped anything with an impact, but I've stripped a lot with a 2' cheater bar. And my air impact wrench has quite a few ugga duggas.

 

[ajtoady]

Just a thought...a new valve from DGX is $40

Sometimes it's about the challenge!!!

 

[Marie13]

Sometimes it's about the challenge!!!

 

[Bob DBF]

Sometimes it's about the challenge!!!

It's always about the challenge. Of course sometimes things come apart in more pieces than originally built, but it does come apart.

 

[Prometheanfire]

Why do you tighten before loosening?

 

[happy-diver]

see this

Phosphoric acid

It only eats what it's supposed to


Vinegar is for stripping chrome and for fish and chips and salad

 

[Alekseolsen]

Why do you tighten before loosening?

It kind of breaks the "connections" made by corrosion or salt crystals.

Whatever you want to take apart, its always better to be able to whack it from "two sides"

 

[-JD-]

It kind of breaks the "connections" made by corrosion or salt crystals.

Whatever you want to take apart, its always better to be able to whack it from "two sides"

If the tightening is successful (i.e. actually produces rotation), then you also get a little free rotation space to allow the part to accelerate before slamming into the obstruction and improving the chance of breaking things free on the loosening attempt.

 

[Bob DBF]

Why do you tighten before loosening?

In actuality, you never do. The offending item is found to be frozen when one tries to take it off, -JD- explains it from there.

If you have used a tap to make threads in metal, you turn in to cut the metal and reverse to clear the debris, then turn in to cut a little more, and so on until done. In this case the debris are salt crystals and the motion breaks them down so they don't jam the threads.

 

[captain]

Here is my theory why using heat works best. Heating the part causes the trapped air in the threads to expand and vent out. Spraying immediately with penetrating oil cools the part creating a partial vacuum in the threads and sucks in the oil.