Tank flushing advice.

[1948man]

I've coated the inside of my gas tank with Caswell Coating. In the process, the filler throat narrowed a small amount so the gas cap wouldn't fit in. I remedied this by sanding the throat but couldn't avoid getting some sanding dust from the liner in the tank. I have a new pristine paint job so I am leery of using much in the way of chemicals in the tank. Can I just flush it good with water (cheap and safe) and blow some air in while draining it and lastly rinse carefully with some rubbing alcohol to assist the drying? Or maybe, putting water in a fuel tank is never a good idea? At least I did remember to keep the little hole in the throat from getting clogged.

[chuck hahn]

Its coated so water will no longer be a concern for rust or anything else. I would pull the petcock and just flush and shake it out real good. Dont heat it to dry it out though as the heat may damage the liner. Shake all the water out that you can and maybe run a coat hanger wire with a rag along the sides to sop up anything laying in the bottom. Then let it dry the rest of the way with the cap off.

[GSX1000E]

Flushing with water and blasting dry with compressed air is just fine. I do it all of the time myself. Re-install the previously removed petcock and fill with fresh gasoline ASAP.

[1948man]

Thanks for the replies. Flush it is and soon My 1100G will be sporting a new ensemble.

[chuck hahn]

Its a coated tank so you can disregard the ASAP part...It can sit full of water for a week and not rust....thats the PURPOSE of a tank liner!!!!!!

[JTGS850GL]

Its a coated tank so you can disregard the ASAP part...It can sit full of water for a week and not rust....thats the PURPOSE of a tank liner!!!!!!

Assuming that the liner is completely covering the inside of the tank and nothing metal was left exposed. Just adding this since I've seen some coating jobs that weren't, what I'd call... Perfect.

After the water flush I'd rinse the tank with a small amount of gas and then drain it just to make sure you didn't leave any puddles of water in the tank.

[chuck hahn]

Trick with the Caswell kits is to thin it with a shot glass of acetone when mixing it. Thins it a little so it flows easier. The most patient place you need to be is in doing the top. If you go slow and rotate it a lot it gets well coated. POR 15 runs pretty easy as it is.

He did mention that it ran into the filler neck so I would think he got it very well coated. Apples and oranges folks.

[1948man]

I did thin the Caswell as allowed by their instructions. I think I got it coated pretty completely but am always a little paranoid I might have missed a spot or two.

[chuck hahn]

If it was thinned and you really rolled it around a lot...and by your description it sounds like you did...I would feel real confident in the job you have done.