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Old 06-17-2021, 12:09 PM   #1
Skoolie
 
Join Date: Jun 2015
Location: Toledo OH
Posts: 103
Year: 2006
Coachwork: Thomas
Chassis: Saf-T-Liner EF
Engine: Cat C7 + Allison MD3060
Rusty air tanks - replace now or wait?

Intuition is telling me "now", but I wanted to get some advice from those who have more experience here.


As you can see, my air tanks are fairly rusty, but seem to be mechanically sound. The only leak I seem to have right now is coming from the air dryer, which I plan to replace. I was contemplating replacing the air tanks at the same time (all 4 to the tune of $159 each). My question is, is it really worthwhile to replace them now, or do we think they're still serviceable?


Obviously I'm not asking about my specific tanks, moreso the experiences of others that have had rusty air tanks.
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Old 06-17-2021, 01:30 PM   #2
Bus Nut
 
Join Date: May 2015
Location: Miami, Fl.
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Year: 1999
Chassis: Amtran / International
Engine: DT466E-Md3060
Quote:
Originally Posted by dbsoundman View Post
Intuition is telling me "now", but I wanted to get some advice from those who have more experience here.


As you can see, my air tanks are fairly rusty, but seem to be mechanically sound. The only leak I seem to have right now is coming from the air dryer, which I plan to replace. I was contemplating replacing the air tanks at the same time (all 4 to the tune of $159 each). My question is, is it really worthwhile to replace them now, or do we think they're still serviceable?


Obviously I'm not asking about my specific tanks, moreso the experiences of others that have had rusty air tanks.
Ospho and por15, you should be fine after that.
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Old 06-17-2021, 03:24 PM   #3
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Location: Philadelphia
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Chassis: CE 300
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I'd maybe get a pro to look at the tanks and see if they warrant replacing, but yours look comparable to how mine looked originally (in fact your whole underside looks similar to mine) and mine is OK after just some scraping and a couple of treatments of Ospho (I've meant to prime and paint mine but never got around to it).

Rust is about 6 to 7 times the volume of the iron/steel it derives from, so a very small amount of corrosion (in terms of % of the original material and loss of thickness) can produce some very nasty-looking scale.
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