How to "shrink" my ADA o-ring?

[jjchambers]

So I'm putting new o-rings on my non-girdled ADA head and the big one seem a bit too big. I ordered these from ADA so I'm assuming it's just stretched a bit. Will putting it in the freezer for a bit bring it back down to size and will it hurt it at all?

Thanks,

J

 

[Matt_E]

Put some vaseline on the o-ring.
Then work it into the groove all around.
It'll fit just fine.

 

[jjchambers]

I was trying that, I had some grease on it and by the time I got it almost all in there, there was like 1/4" still left.

I put in the freezer for 10min and then it fit perfectly.

Thanks,

J

 

[QuickMick]

your stretching it as you put it on. refit it and it will fit correctly. take your time.

 

[sflsurfrider]

your stretching it as you put it on. refit it and it will fit correctly. take your time.

yup. sometimes you have to chase it around a few times and find where its stretched to allow it to naturally contract into the groove.

sometimes too much grease is bad because it fills up the groove and doesnt let the o-ring sit all the way in.

 

[Shonuff]

Don't freeze your o-rings. We learned that from the Challenger tragedy.

 

[restosud]

Don't freeze your o-rings. We learned that from the Challenger tragedy.

huh,not exactly rocket science involved in this sport now!much less rocket scientists?:slap:

 

[vitaly]

huh,not exactly rocket science involved in this sport now!much less rocket scientists?:slap:

You are mistaken. There are a few real rocket scientists and many good engineers on this forum.

 

[WaveDemon]

yeah, you should check out the 212 hp x2 build! hahahaha

 

[Metal4130]

Freezing some rubber o-rings brings the polymer below its glass transition temperature, making it extremely brittle. Same thing that happened to the challenger spaceship. Its science, its boring, but its my life.

 

[jjchambers]

your stretching it as you put it on. refit it and it will fit correctly. take your time.

That's what I thought I was doing, so I made sure I was pressing it down into the groove all the way around instead of "smoothing" it in. It was still a bit long/stretched. The freezer trick worked but I'll be more patient next time. Thanks guys!

J

 

[feartheride]

Freezing some rubber o-rings brings the polymer below its glass transition temperature, making it extremely brittle. Same thing that happened to the challenger spaceship. Its science, its boring, but its my life.

What falls under some ,I use mostly viton which are for high heat

 

[yamanube]

I usually just cut and glue mine when they are to long.

 

[yamaslut]

if it is too big then just cut it and super glue it back together. It probably won't need that since the info above will probably fix it.