ZAP Posted September 23, 2006 Share Posted September 23, 2006 I've had my medium Mya for over 2 years now and it has been heavily used throughout. A couple of days ago, I bought a pair of auto-seal multi hose adapters but I have to unscrew the existing hose outlet first to put it in. The problem I am facing is that as i've NEVER removed that part of the stem, it's obviously built up a lot of gunk in the threads. I've tried keeping it soaked in hot water but it still can't be removed.Any tips? Link to comment Share on other sites More sharing options...
Erica Posted September 23, 2006 Share Posted September 23, 2006 I don't think the older Mya's air valve come off. I think that has just been added recently.I could be wrong, but I'm pretty sure that they don't come off Link to comment Share on other sites More sharing options...
Sonthert Posted September 24, 2006 Share Posted September 24, 2006 Heating is the wrong thing to do, it makes the metal expand...making it tighter....try the freezer. Or try ice water. Link to comment Share on other sites More sharing options...
ZAP Posted September 24, 2006 Author Share Posted September 24, 2006 Thanks Tangiers, will give it a shot.I tried hot water as I recall a post by Mr. Badawi on these forums instructing someone to do that Link to comment Share on other sites More sharing options...
Sonthert Posted September 24, 2006 Share Posted September 24, 2006 Hmmm. Interesting. Heat makes things expand, does it not? Would it not then follow that heating a threaded joint would make the metal expand, making the inner diameters smaller and the outer diameters larger (of a washer or something). Cooling it is the thing to do. Link to comment Share on other sites More sharing options...
pauldavis Posted September 24, 2006 Share Posted September 24, 2006 well, if you could figure out a way, heating up the stem while putting ice on the valve may helpTHATS SCIENCE!!!! (in booming announcer voice) Link to comment Share on other sites More sharing options...
nuschultz Posted September 24, 2006 Share Posted September 24, 2006 Wait, doesn't cooling things cause expansion? Case in point, ice in an ice cube tray. Link to comment Share on other sites More sharing options...
Calcartman Posted September 24, 2006 Share Posted September 24, 2006 [quote name='nuschultz']Wait, doesn't cooling things cause expansion? Case in point, ice in an ice cube tray.[/quote] Water is the only molecule that expands when cooled.Cooling slows down the movement of molecules, moving them closer together. Link to comment Share on other sites More sharing options...
SanguineSolitude Posted September 24, 2006 Share Posted September 24, 2006 rubbing alcolhol to dissolve the gunk? wd40 for the valve. just give it the clean of its life afterwards Link to comment Share on other sites More sharing options...
Sonthert Posted September 24, 2006 Share Posted September 24, 2006 Lets see...no, no, no, yes. If you were to heat the stem, but cool the valve, the stem part would be expanding, tightening the connection. Although the valve would be contracting, it would be a close wash. Cooling everything is better.Water undergoes hydrogen bonding which gives it the ability to be a liquid a room temperature. When it freezes, the hydrogen bonds break, so it expands. In fact 4C is the highest density point for water. Most things contract when they cool. Most things contract when they freeze. Water is a strange exception of a solid being less dense than the liquid. Why does metal in a car that's overheating, from lack of oil, grind together? They've expanded. Water is not the only molecule that expands when its cooled. Its fairly rare, but its not unheard of .Indeed cooling does slow down molecular movement. I would refrain. I think it can be removed with mechanical means...chemical means might be a little too severe at this point, although rubbing alcohol might be the best trick. Link to comment Share on other sites More sharing options...
Scalliwag Posted September 24, 2006 Share Posted September 24, 2006 ^^^^ Agreed on rubbing alcohol. Submerged it into the rubbing alcohol and put it in the warmest place you can find. The warmer the faster it will work. I am pretty sure the reason Mr. Badawi recommended heat is because most likely it is seized from gooey shit. If you heat the goo it will be easier. Kind of like using loctite red, you use heat to break it loose if you ever need too. Link to comment Share on other sites More sharing options...
ZAP Posted September 24, 2006 Author Share Posted September 24, 2006 Well I was able to get it off.I froze it and then removed it using a big spanner. Dang it was difficult.Only problem i'm facing now is that the original outlet is a male connection and the auto seal ones I got are female Link to comment Share on other sites More sharing options...
al-bab Posted September 25, 2006 Share Posted September 25, 2006 [quote name='ZAP']Well I was able to get it off. I froze it and then removed it using a big spanner. Dang it was difficult. Only problem i'm facing now is that the original outlet is a male connection and the auto seal ones I got are female [IMG]smileys/smiley21.gif" align="middle" />[/quote] You can unscrew the male connection no problem...i put a small piece of paper towl around it...then unscrewed it with plyers Link to comment Share on other sites More sharing options...
ZAP Posted September 25, 2006 Author Share Posted September 25, 2006 You mean the existing non-autoseal male outlet can have the male connection unscrewed? It doesn't look like it can be unscrewed and I don't want to mess the threads up with pliers so can you please just confirm? Link to comment Share on other sites More sharing options...
EvansLight Posted September 25, 2006 Share Posted September 25, 2006 thats how the purge valve is on my qt. The pruge valve is in two parts, the first half of the valve screws off to be able to take the ball out, but theres the male section that goes into the stem, and it screws off as well, just not as easy Link to comment Share on other sites More sharing options...
al-bab Posted September 25, 2006 Share Posted September 25, 2006 [quote name='ZAP']You mean the existing non-autoseal male outlet can have the male connection unscrewed? It doesn't look like it can be unscrewed and I don't want to mess the threads up with pliers so can you please just confirm?[/quote] Thats how it works on my MYA. In order not to damage the threads i put paper towl around it first and didn't you much pressure Link to comment Share on other sites More sharing options...
Sonthert Posted September 25, 2006 Share Posted September 25, 2006 It is likely that there is a female connection into stem, a male-male union is screwed into that and then your previous hose piece was a female piece screwed into the male-male union. Link to comment Share on other sites More sharing options...
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