An earth-shattering kaboom?

[The Incorrigible Dirigible]

Approximately twice a day, there's a loud, metallic BOOM from the rear of our coach. It sounds like someone kicked an aluminum air duct. It seems to do it once in the morning and once in the evening, so I assume that something is expanding and contracting as the day's heat goes up or down. It's hard to tell if the noise is coming from above or below.

At first I figured it was just the gas tank settling, but the noise seems to be getting louder every day, which suggests that something isn't right. This morning it was loud enough to wake us up. Has anyone else experienced anything like this?

[Clay L]

I have had something similar happen at least two different times and locations when the leveler jacks are extended close to their limit.

I was able to stop it by putting blocks under the jacks so they were not extended as much.

[jeepfreak]

If it happens every day I would try leaving the gas cap loose and see it it still does it. If the tank is not venting (if it is even supposed to ) there could be a pressure build up . Also is your water tank full? maybe thats not relieving pressure. Just a thought. If you find out what it is please post.

[becks]

I to have had leveling jack noise as Clay L states.

[Gary RVRoamer]

Had that problem in a 96 Southwind on a Ford chassis - it was the fuel tank expanding & contracting on its sling mounts. Never could do much about it when the nights were cool.

Had a similar problem in the current coach, an American Tradition. It was the jacks and happened when either end was jacked much higher than the other. Dropping the high end a bit stopped the frightening noises. Had a dealer tinker with the jacks, replacing some seals and what not with only small improvement. American Coach said the jacks might be marginal in size for my weight and offered to replace them with a larger jack (for free, even though my warranty was long expired). That solved the problem 100%.

Since your problem seems to be newly arrived on an older coach, I would consider having the jack hydraulics rebuilt.