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Filled tires lost air

B

Bart CA

Member
MF-50 in the garage all winter.
Each spring I have to put some air in the rear tires (calcium loaded)
to have 13 PSI. I do not see calcium leaks but it looses air.
Can it loose air but no liquid ?

Thank in advance

Bart
 
Seasonal air, winter air, spring air, summer air fall air. Tires are fickle and like the current fashion in air. I'm not a very good comedian so if you do not find humor here, I apologize. gobble
 
Sure, the N2 molecules in air are smaller than the H2O molecules of water.

The assembly line leak test machines we build for Harrison Radiator in the 1980s used helium as the smaller molecules leaked out easier than either air or refrigerant.
 
The more liquid, the less air volume.

With reduced volume, it doesn't take much pressure loss to have a major effect.

They are leaking somewhere though, both air and/or calcium, depending on where the leak is and where the wheel stops when parked.
 
Nope. The liquid is migrating out of the tube through a very small leak and in between the tire and rim.

When you break down the tires you'll find that some or all of the fluid is in the tire cavity, and your rims will be badly rusted.
 
Was at a tractor pull last fall in MASON MI. I checked the air pressure the first morning and they were as what I had set them at before leaving for the pull. Checked them again the next morning and they were down 2 psi. Atmospheric pressure I am sure was to blame for it. Others were also complaining about the over night change.
 
Look up tire porosity. Overtime the tire will get lower in pressure without losing any of the calcium. The air molecules are small enough to go through the rubber.
 
I would start by putting the stem up and on a jack so take the weight off the tire check the core for being ate up from the chloride. It will eat the cores up in a few years so if you have not checked and changed them lately that is most likely your problem. Cheap and pretty easy to see. If on tubeless look for small droplets of moisture on the outside of the tires. If tubed Chloride is in between the tube and tire and will show leakage if the stem is on the bottom for long enough to fill the void between the tube and tire. yup they are tight together in the tire and still has room for fluid to set between them. I would drain them till I was going to fix them or pull them apart. You should then when reinflated see bubbles as it sets while assembled. Will need some soap on the stem to see them come out around the stem or through the stem where the part that screws in or the core is ate up.
 
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