air going somewhere.....

Another good idea...

 

Honestly, this is absolutely nothing, perfectly normal. It is completely unrealistic to expect a truck, brand new, or 10 years old to perfectly hold air. There are literally dozens and dozens of connections. Small leaks here and there are common place. Your not driving a NASA space shuttle or a submarine that have to be air tight. The air line connections just aren't perfect. We have seen customers spend literally hundreds of dollars to find these tiny leaks which have absolutely no effect on the performance or safety of the truck at all. For whatever reason they are just bothered by it. I wouldn't recommend ripping your truck apart, or start to replace expensive parts for something like this. If your truck looses all air in about 1 hour, then yes, that needs to be fixed.

 

My old FLD would hold 120 lbs of air for a week... simply amazing. My current ride was also very good until about a year ago... I have a small air supply line with a pin hole on the firewall.. just an annoyance but one of these days it will be fixed.

 

I kept losing air on one of my trucks. It nearly drove me nuts trying to find the leak. Finally, I was standing behind the tractor and found it. As it turned out it was an air bag under the rear of the cab. Most air leaks are fairly easily found, but every now and then you can get one that will drive you crazy. I have one in my dash that is coming from a valve. I have the valve and will replace it before pulling out again. It is sort of a pain to get to it, but I don't like air leaks. It isn't a bad leak, but losing air is never a good thing.

 

im very surprised with my truck...i guess im lucky it doesnt lose air when sitting over night...my old truck would leak every lb of air out. i just didnt worry about it cause i would fire it up to warm up.

 

Since you've replaced the suspension bags, I'd go ahead and replace the cab bags, $50 at WS, as well as the leveler valves for cab and suspension. All are cheap. While your under the sleeper, might as well replace the shocks too $25 at WS last time I bought them. IMO, the cab/sleeper air ride is a piss poor design, and I replace my cab bags every year and a half or so.

 

Another place to keep an eye on as if you haven't heard enough places yet...the shift knob on your 13 speed. I know...you think a guy would be able to hear that but not always so. There are little balls and springs in there that can allow air to escape when the splitters are not in exact position. Normally not a problem area but it can happen.

 

I have chased many air leaks. I find many while it is raining & I am loaded. found one just last week at my truck leveling valve, right beneath the swivel nut, that one of the air lines go to. found a lak one time on air compressor, but it would only leak if truck was running. sprayed fan hub one time, did not see any leaks, but a few months later, decided to use actual leak detector, & after waiting about 5- min, I saw the entire fan hub leaking. also be aware that if a leak is strong enough, it can blow the soap out of the way & leave no bubbles. that is why I use more than just a mild solution of soap. had many brake chambers leaking & air bags when both were less than couple months old. I am pretty good at telling someone how to find their air leaks, but not so good at finding my own.

 

air systems leak. its the very reason trucks use them. you can have an air leak in a brake system and as long as its not a bad one the brakes still work fine. not so with hydraulics. your system is better then mine on my 05 and well within spec.