Low Pressure curbside

[Silverbee]

2007 Safari SE 20ft. Single Axle.

Having trouble with air pressure decrease on curbside. Replaced tires in August this year-Triangle-set at 65 lbs pressure. Air leaks down on curbside only after sitting on return from mountains. Strange thing is, this happened on the old tires which were 5 years old-not a lot of use-maybe 2000 miles travel. Seems to me the problem has to be with the rim. I believe we are still under warranty. Any thoughts/ideas?

[JackMac]

Was the valve stem changed when the new tire was installed??

[dkottum]

Do the rims show signs of corrosion, especially at the edges? I've had slow leaks from several alloy rims over the years on my cars due to corrosion where the tire mounts on the rim. I suppose corrosion around the valve stem could also leak slowly.

Put some soapy water around these areas and look for bubbles.

doug k

[Ag&Au]

Originally Posted by Silverbee

2007 Safari SE 20ft. Single Axle.

Having trouble with air pressure decrease on curbside. Replaced tires in August this year-Triangle-set at 65 lbs pressure. Air leaks down on curbside only after sitting on return from mountains. Strange thing is, this happened on the old tires which were 5 years old-not a lot of use-maybe 2000 miles travel. Seems to me the problem has to be with the rim. I believe we are still under warranty. Any thoughts/ideas?

How much Pressure do you lose over how long a time?

Ken

[Silver Goose]

There was a time when they unscrewed the valve stem to let the air out before removing the tire. Now every place I've been replaces the stems automatically. Do you know for sure that the stems were replaced? Some places still have a tub where they can submerge half the wheel at a time to see where the bubbles are coming from. I agree that since the tires have been replaced and you have 1 with a slow leak compared to the other tire, the wheel is suspect.

[Silver Goose]

Another thought, is the trailer parked so that the street side is in the shade all day while the curb side faces the sun and goes through repeated cycles of hot to cold? I don't know if that would make much difference or not, rotating the wheels side to side would rule that out.

[Silverbee]

Thanks everyone so far. Valve stems were replaced. Has lost 4 lbs pressure over 7 days.

[withidl]

On my 2002 ASCL 31' I had an aluminum wheel fail just inside where one of the spokes meets the perimeter of the wheel. It was a "hair-line" crack running longitudinally along the wheel perimeter. Jackson Center replaced the wheel at no charge even though I was out of warranty.

[Ag&Au]

Originally Posted by Silverbee

Thanks everyone so far. Valve stems were replaced. Has lost 4 lbs pressure over 7 days.

There are so many variables here, change in temperature, change in altitude, sun vs shade, etc. Personally I wouldn't be convinced that there was a problem until I allowed the tire a chance lose more pressure than that. If there is a real problem, I think you have narrowed it down to the wheel.

Ken

[Silver Goose]

Originally Posted by Silverbee

Thanks everyone so far. Valve stems were replaced. Has lost 4 lbs pressure over 7 days.

That's a lot, you should see bubbles if you submerge it. Do you have a kiddie pool? Or make up a solution of water and dishwashing liquid and sponge it on around the rim and watch for bubbles, then flip it over and do the other side. Check where the valve stem comes out of the wheel also. There's always a chance you picked up a nail in the new tire.

[Ag&Au]

Originally Posted by YankeeDoodle

That's a lot, you should see bubbles if you submerge it. Do you have a kiddie pool? Or make up a solution of water and dishwashing liquid and sponge it on around the rim and watch for bubbles, then flip it over and do the other side. Check where the valve stem comes out of the wheel also. There's always a chance you picked up a nail in the new tire.

There is no way you are going to see bubbles with a leak that slow. Think about it, that is just barely over a half pound a day. That is not a lot of pressure loss. I see almost that much change (4Lbs) in our tires in the sun between a hot afternoon and a cool early morning . I learned that while setting up out TPMS.

Ken

[tpi]

I'd try the kiddie pool too. I think losing a half pound a day pressure at 65 PSI you would see a bubble or two if you're the least bit patient. I'd start with the valve stems using a soapy solution before dismounting tire.

[NOLA Geoff]

Whats the max psi on the sidewall?? If it's 90, you could probably get up to 80 and the soapy solution may show bubbles. I like the sponge idea. Definitely stay under the max psi. If you don't see it after a few minutes, pull the trailer so the tire rotates 180•, and try the soapy stuff again. Good luck!

[overlander63]

Originally Posted by NOLA Geoff

Whats the max psi on the sidewall?? If it's 90, you could probably get up to 80 and the soapy solution may show bubbles. I like the sponge idea. Definitely stay under the max psi. If you don't see it after a few minutes, pull the trailer so the tire rotates 180•, and try the soapy stuff again. Good luck!

Load range D tires have a maximum pressure of 65PSI.

[ROBERT CROSS]

Alloy wheels?

In rare cases...it may be a porous wheel. Lotts'a soapy water with the wheel laying flat at 65-70 psi, Good Luck.

Bob

[pmclemore]

Rims.

Pat

[edglenn]

It's a bad rim.