A few years ago, I purchased and had installed a set of Borg Dually valve replacement valve stems. These valve stem replacements have been discussed on here several times, and everyone that has them (including me, for the most part) have been very happy with them. They make it 100 times easier to check, top off all the tires, and eliminate the risk of leaks like can happen with valve extensions.
I did have an issue with the valve stem on one inner dual tire leaking the day after the new valve stems were installed. I took it back to the tire place that installed the stems, they took it off and found the O-ring for the valve stem had not been installed properly, was crushed and leaking. They corrected that (replace O-ring), re-mounted tire. Problem solved - was basically a bad installation issue, not the fault of the valve stems at all (I hope!)
..Fast forward a few years up to now, I seem to be having a problem with one of the inner dual tires leaking air again. Noticed this several weeks ago when checking the tires, the passenger side inner dually tire is losing about 10 psi every week or so. Last week, I took it to the ONLY tire place close to here with facilities to handle large rigs like this (same place that installed the valve stems a few years ago). They took the tire off, sprayed it over and over with soap water, looked over entire tire several times. Also sprayed and looked close at the (very long) valve stem. I looked with them as well, and there was ZERO evidence of any leaks anywhere (no bubbles). They also grabbed the long valve stem, moved it around some while watching for leaks at the base. There were none.
Fortunately, they didn't charge me anything. They just mounted the tire back on and sent me on my way, told me to bring it back if it still leaks.
Well, sure enough, its still losing air - since Saturday, it has lost 8 pounds. I realize that air pressures drop some when air gets colder, and it has been cold. However, I don't believe thats the cause here. I've checked the other tires as well, and none of the other tires have dropped anywhere near this much pressure.
I'm not sure at this point, if I have another valve stem leaking, or a nail or something in the tire causing it to leak. Can find no evidence of either, unfortunately.
Sooo, now, I'm not sure what to do next. Hesitant to take it back to same place again, as I'm afraid they're going to be less than helpful, since they already checked the tire once so thoroughly and found no leaks. Would like to take it to a place I know is very, very good at finding, fixing tire leaks (Tire Kingdom), but their parking lot is tiny, and sloped enough there is no way I can take the MH there. I've found in general that most tire places want nothing to do with rigs like this, unless they are set up to handle large trucks.
I may try to jack up the MH, take the tire off, and take just that tire to a few places to have them look for leaks. That'd be best, I think, but I don't have a jack capable of lifting it (yet, been 'shopping' for such). Could use the leveling jacks, but absolutely hate that idea. I have an air compressor and impact wrench I use for the other vehicles, but not sure if it will get the lugs off on the MH, anyway. They are 150 ft-lbs by Ford's spec, but there's no telling how much torque it'll take to get them off.
Anyone have any ideas on what else I might do or ask a tire place to do, to find where, why this tire keeps leaking? DW just told me to go buy a new tire, but without even knowing if its the tire, valve stem, or even possibly the rim causing the issue, that doesn't seem like a very wise thing to do, haha.
๐Has anyone that uses Dually Valve stems, ever had a leaking issue like this? I really, really don't want to think that the dually valve stems are the culprit here, but not sure what else to think..
Will and Cheryl
2021 Newmar Baystar 3014 on F53 (7.3 V8) Chassis ("Brook")
2018 Jeep Wrangler JK ("Wilbur")
