Topic: Tank Lining issue

[grags1]

At the moment im stuck on one part of build so i figured id move onto getting my tank all set.  After looking in the tank i find that the previous owner had it sealer or lined but now there are pieces of the sealer that have come off and are in the tank.  Ive removed as much of them as i can but now im a little stuck as what to do.  How do i go about removing the rest of the liner or shouhld i just reseal over it?

[Johnie]

I think it would be a big mistake to try to seal over another liner. You do not know if your new liner will stick to the old one, etc. I had a liner in my tank and still developed a small leak. The old liner was removed by the local radiator shop as with some caustic stuff. That is the proper way to do it if you want to be sure you do not have to do it again. Just my opinion though. Maybe some other guys did something different.

[Duke McDukiedook]

Yep, you'll have to somehow remove that old liner and re-etch it before going forward.

[BeSeeingYou]

And then don't use a liner unless you have a weak tank with leaks.  I don't see any other reason to use one.  They fail as often as they succeed.

[Zig]

And then don't use a liner unless you have a weak tank with leaks.  I don't see any other reason to use one.  They fail as often as they succeed.

Good advice.

[wardenerd]

for $65 the local radiator place cleaned and coated my 650 tank.  the por or kreem system cost nearly as much and is not really professional becaUSE OF THE STRONGER CHEMICALS.

[grags1]

So in pretty much stuck taking it in to be cleaned. There are not chemicals for me to do it on my own?

[fmctm1sw]

Lots of schools of thought on this.  Toilet bowl cleaner seems to get high marks.  Search for The Works toilet bowl cleaner.

[Duke McDukiedook]

I'm not sure that would remove the liner, depends on what it is.
I could have sworn that someone said most liners can be removed with acetone?

[Ved]

Well does it appear to be Kreem or Por liner?

For POR, they make stuff called POR-Strip, but be careful, this stuff is nasty.
http://www.por15.com/POR-STRIP/productinfo/RSG/

I have also heard of the acetone trick. Fill it up all the way with acetone. Let it sit overnight. The next day drain about half of it, add some nuts and washers, shake it like a Polaroid picture. Lather rinse repeat. Pick at whats left with a coat hanger...

[ekpent]

Try some good paint stripper and not the thick pasty kind,but some that is thin,more fluid.Put in a quart or so and swish it around with some nuts and bolts. Be careful as you have a chemical reaction going on in there and it will build up some pressure.Rinse it out with cold water.Most furniture strip is water soluable.If you have some rust in there hit it with the "works" toilet cleaner and get the inside dry ASAP.I use a shop vac that can blow as well as suck  Whoops almost sounds dirty  Good luck on it.

[mycb750k6]

Ask the POR-15 or Kreem people or maybe their web site. That stuff sets up pretty hard though. Could you maybe just start with another tank? Just asking. Crap in the tank soon clogs float valves, idle valves and huge amounts of carb headaches.

[Nikkisixx]

A reputable radiator shop is your best option, the chemicals used to dissolve an old liner are nasty and it is a lot of work (shake, agitate, rinse, pick, repeat).  If a radiator shop is not an option you can strip it yourself. 

A kreem liner is cream coloured and is soluble in MEK (methyl ethyl ketone).  A 10% MEK solution in Xylene will dissolve the liner.   

A POR-15 liner is silvery grey and is soluble in the POR-15 product available on-line or at some Carquests (around here).  Use some kind of media (chain, nuts, bolts, screws) when agitating the solution.  Use "The Works" toiletbowl cleaner to remove residual rust if it exists.

[asom]

^