How to clean out a rusty gas tank, or clean anything with rust on it for CHEAP.

[Trackdog]

 
Thanks 'painter!
I gave this a little thought. I try to mentally reverse engineer everything I pull apar.t
But I'm going go with a little two-smoke oil over the KY.

[ducpainter]

Make sure you reduce the Caswell the maximum they allow. Left full strength it won't flow well enough to coat the entire tank.

The product is intended to seal perforated tanks, which is why it's as thick as it is.

[Trackdog]

Thanks again 'painter!
I wasn't planning on thinning the product,  that would have sucked....
But that makes sense. These Monster tanks ain't round.
I'm filling it up with Evaporust today and letting it soak for 24Hrs.
I got as much of the scale off as I could and there is some pitting.
I have an ultrasonic thickness gauge that I can measure wall thickness everywhere but a don't think a pit gauge will fit in the tank.
Hopefully I get a bunch of uniform measurements.
But like i said, the tank ain't leaking now and with a little luck the Caswell will give me a worry situation. Fingers crossed

" no more than 1 fl oz in the motorcycle kit"

[ducpainter]

Again, their recs are to assure the product remaining viscous enough to seal perforations.

Additional reducer will slow the set-up time, but doesn't change the full cure time.

I always oriented the tank, after draining, so any excess product flowed to an area I didn't mind a build up. Best place to drain excess is out the sender hole. Be careful of any large volume of product left over. It can get hot.

One oz should work. Add 1/2 oz and use the paint stick test...stick the stirrer into the reduced product and lift it straight out. If it doesn't flow freely off the stick, it won't flow freely in the tank. You can add more...you can't take it out.

Good luck!

[ducpainter]

Posting some pics for Trackdog. He'll come by and add the play by play.



nomanclature 2004 S4R fuel tank by nhistrackdog2007, on Flickr

before by nhistrackdog2007, on Flickr

after by nhistrackdog2007, on Flickr

IMG_4788[1] by nhistrackdog2007, on Flickr

[Trackdog]

So, as you can see by the pics Evapo-Rust works.
The first pic is for all who need to know where each "hose" needs to be connected.
Also you will see a measurement. I went around a good portion of the tank with an ultrasonic thickness gauge to get wall thickness, looking for any significant loss that may cause concern. Results were as expected. No significant wall loss from corrosion, just pitting.
I decided to Caswell for insurance and I did not want the corrosion to return.