Rear tire leaking rimguard

greg_g · Mar 29, 2012

arrow said:
Because the Rim Guard is not pressured sufficiently enough with the rather small area of air which is pressured. If it were high pressured, it would turn with the wheel.

You're joking - right?

//greg//

arrow · Mar 30, 2012

s219 said:
???

That doesn't make any sense -- what are you trying to say?

Glad you asked at least. The op had a question as to why the rim guard wouldn't leak out if he had a bead break if he put more pressure in. First, the Rim Guard would leak out with no pressure so a slight increase in pressure, if it did not close up the bead, it will still leak and have nothing to do with the pressure as the pressure is not great enough to have this stuff squirt out like hydraulic fluid. The pressure would have to seal the bead. With these minimal pressures, the fluid is not compressible as air is so it cannot gush out like an air leak would.

arrow · Mar 30, 2012

greg_g said:
You're joking - right?

//greg//

I don't think I am but if you find it humorous I'm happy for you. I know it could never happen in this case but if there were so much air pressure in a vessel that could stand it that also had liquid in it, you could turn that vessel upside down and the weight of the liquid would be insufficient to displace the highly pressured air. I mean pressure is measured on how liquid can be displaced in a column.

Deere Dude · Mar 30, 2012

greg_g said:
I suspect you may not have had enough air on top of the RimGuard, which permitted a foreign object to wedge between the bead and the rim. Assuming over-pressure doesn't work, the fix may not be complicated. But is likely to be difficult because of the weight involved.

I couldn't do it myself, my R4 rears probably weigh over 500# each. And I don't know if it could even be done safely with two people. But - with enough people and/or the right kind of equipment - the tire could laid flat with the leaking side facing up. If this puts the valve stem pointing at the ground, any remaining pressure should be released first. Once deflated and lying flat, the leaky rim seal should be broken. The remaining RimGuard will occupy the bottom 70% of the tire. The upper 30% will be an air pocket. This will permit you to reach in and clean the bead and the rim. Add air to reseat the bead, stand tire up, check for further leaking, reinstall if successful.

//greg//

How can that work? If the valve stem is down to the floor and the leak is on top, once the leaky seal is fixed, how can you put air in the tire to reseat the bead?

I would think bad things would happen quickly by letting the air out of the tire standing up and then trying to lay it down with all that weight and no air pressure in the tire.

arrow · Mar 30, 2012

greg_g said:
In the context of the discussion, it cannot. Don't have a clue why arrow even wasted our time with this,

//greg//

You don't have a clue but you still think it a waste of time? Some people think differently than you and I so perhaps, just maybe, approaching it from a different angle allows them to connect better even if it seems to you to have little to do with the actual circumstance. It's called an "analogy"

greg_g · Mar 30, 2012

Deere Dude said:
How can that work? If the valve stem is down to the floor and the leak is on top, once the leaky seal is fixed, how can you put air in the tire to reseat the bead?

I would think bad things would happen quickly by letting the air out of the tire standing up and then trying to lay it down with all that weight and no air pressure in the tire.

You misunderstood my explanation, or perhaps you're thinking vertical. You can lay a tire down (horizontally) two ways; valve stem facing the ground (and therefore inaccessible), valve stem facing the sky. If you want to add air, the valve stem needs to be facing the sky. But I now see a fly in my ointment. If the rim leak is on the side of the rim opposite the valve stem, you can't do both.

So the question becomes, is the leak on - or opposite - the valve stem?

//greg//

s219 · Mar 30, 2012

I don't know what either of you clowns are talking about now

. But since I work in fluid dynamics for a living, and both air and rimguard are fluids, I feel compelled to note that the lighter of two immiscible fluids in a vessel will always be on top here on earth where gravity points down.

rsewill · Mar 31, 2012

s219 said:
I don't know what either of you clowns are talking about now . But since I work in fluid dynamics for a living, and both air and rimguard are fluids, I feel compelled to note that the lighter of two immiscible fluids in a vessel will always be on top here on earth where gravity points down.

These are normal TBN clowns who don't know normal from normal.

arrow · Mar 31, 2012

s219 said:
I don't know what either of you clowns are talking about now . But since I work in fluid dynamics for a living, and both air and rimguard are fluids, I feel compelled to note that the lighter of two immiscible fluids in a vessel will always be on top here on earth where gravity points down.

C'mon S. Air is a fluid only in that it can flow. A real fluid that is not a gas is a much more difficult substance to compress than air. Your statement that you are compelled to spout (he-he) is true of course but you know as well as I do that pressure can change natural earth physics. (not enough to influence a tractor tire though) Cheez, the next thing you might say is a pound of water weighs the same as a pound of air and you know that can't be.

and rsewill: the trouble with "normal" is that most think they are don't you think?

greg_g · Mar 31, 2012

s219 said:
I don't know what either of you clowns are talking about now . But since I work in fluid dynamics for a living, and both air and rimguard are fluids, I feel compelled to note that the lighter of two immiscible fluids in a vessel will always be on top here on earth where gravity points down.

At atmospheric pressure, yes. But you're ignoring compression. Air is compressible, liquids are generally not. When the air is sufficiently compressed, it can and will force a column of liquid against gravity. Same principle that makes air-hydraulic jacks work. My point was that - in the otherwise inexplicable example that arrow presented - it's not possible for a rubber tire to contain an amount of pressure sufficient to force RimGuard to the top. Not sure a tire actually represents a column anyway.

Which makes this whole diversion useless to the actual topic; how to remedy a RimGuard rim leak. To resume, it would help to know if the leak is on the same side - or opposite - the valve stem.

//greg//