84 250r needs tank derusted

[robert leon]

Ok guys maybe you can help and have some good ways of derusting a great looking tank on the out side but rusted on the inside. Please post up ideas thanks Robert

[dougspcs]

There are many other threads about rusted tanks and solutions...

I suggest you do a search on the subject..all the answers have already been posted to read!

[fabiodriven]

Like Doug said, a search will show many results. The easiest way to deal with rust in a metal tank is to coat the inside of the tank with Kreem, Red Kote, or Caswell. It seals the inside of the tank. Hooray!!!

[robert leon]

Thanks guys will do. I saw another chemical or cleaner called metal rescue has anyone heard of it or used it. I watched a video on YouTube seem to have worked fine. Might go that route but def will look in to more threads. Thanks

[rdlsz24]

You can search POR-15 also. They make a nice little kit for around $50 on eBay. I have used them on 110 and 200x tanks with good results.

Rob

[perrycyn]

I had a 250sx tank that was badly rusted. I went to NAPA and got some Dupont 5717s metal conditioner and diluted it with water (I can't remeber the acid to water ratio but it was on the strong side) and filled the tank and left it for 2-3 days and the rust was all gone. Just be carefull its strong acid.

[tri again]

You can search POR-15 also. They make a nice little kit for around $50 on eBay. I have them on 110 and 200x tanks with good results.

Rob

That's GONNA be my next fix.

I had a NEW sx tank on the outside but the inside was hopeless.
POR 15 reacts WITH the rust chemically to seal/reform, not coat, the rust.
and will seal the weeping pinholes.

Yeah, I hope the search key works because there are Volumes of
stories about tank rust.

I scrubbed some phosphoric acid on a rusty woodstove outside
and it turned it to some sort of inert black glass.
I guess that's the concept of por15.

Still not convinced with the 'coating / liner' types.

Stories about them coming off / peeling are not real comforting.

Good luck. In the time it took me to decide what to do,
I found a whole parts sx with a perfect tank for 100$
so I still know nothing real about tank rust fixes.

[bkm]

A cheap way to do it is fill the tank up with white vinegar, add salt to it and let it sit for about five or six days shaking it every so often. I emptied the tank flushed it several times with baking soda/water mix. I did this with a badly rusted 70 tank and it worked great.

If you decide to use a strong acid make sure you neutralize it with baking soda.

[Xpress]

^I would also go on the safe side and put a coating on the inside, to eliminate any threat of future rusting.

[tri again]

A cheap way to do it is fill the tank up with white vinegar, add salt to it and let it sit for about five or six days shaking it every so often. I emptied the tank flushed it several times with baking soda/water mix. I did this with a badly rusted 70 tank and it worked great.

If you decide to use a strong acid make sure you neutralize it with baking soda.

yupp, X10 on the neutraliZING with baking soda.
and do NOT breathe those vapors.
and flush with a garden hose for 20 minutes or so.

Hey, what did that one kid do?
Washed his tank real good with soap and hot water so it didn't stink,
wrapped it in a sleeping bag so it wouldn't bounce around,
filled it with little rocks or bb's or srews or something
and them carefully put it in the dryer (with no heat)
just to roll it around for a while and knock the rust off the inside.

[snopro700]

i just cleaned a 110 tank today. this one was filled with rust, so i used some muratic acid, swished it around (with the cap on), let it sit, swished some more. 15 minutes later the tank was spotless.

only thing with muratic acid is you need to be super careful about getting it on anything but the inside of the tank. as for rinsing i used water an some simple green. rinsed it out for a long time to make sure everything was out. then dried it with a heat gun.

[atc007]

My customers are telling me that the new ethanol fuels dissolve KREEM kits... I don't know 1st hand,,just throwing that out there. They have worked well in the past for sure. I like Brians idea the best so far,,never tried that one,,but I've got a FL350 that's gonna get it!!!

[tri again]

i just cleaned a 110 tank today. this one was filled with rust, so i used some muratic acid, swished it around (with the cap on), let it sit, swished some more. 15 minutes later the tank was spotless.

only thing with muratic acid is you need to be super careful about getting it on anything but the inside of the tank. as for rinsing i used water an some simple green. rinsed it out for a long time to make sure everything was out. then dried it with a heat gun.

Muriatic acid is pretty dramitic, eh?

Like killer smoke from a horror movie, for sure. and I'm sure IT IS!!!

Gotta make sure there's a breeze blowing it away from any personal air intakes.

A general rinse and then maybe neutralize with baking soda.
a blast of baking soda directly into acid is never a good idea.
They also say add acid to water as opposed to the other way around.

drydrydry.
I like the hairdryer / heatgun idea.

I'll even use a little 'heet' because it's SUPER evaporative and takes out the last moisture.

then long nozzled airgun to hit the corners and tight spaces.

AmaZING what rustdust comes flying out even after a good cleaning.

Just don't breathe ANY of it.

[jays375]

Think this problem needs a sticky.If the paint on the tank is nice use Evapo Rust.Usually a gallon will do the job.First clean it out with a good quality degreasser.Usually divide the Evapo Rust in half.I let it sit overnight on the bottom,do a side during the day.Then dump it out and add the other half gallon and do the top and other side.Next is to hit the spots missed.Then dump it out and rinse it out.Like stated above it has to be dried out with a heat gun or hair dryer.Then seal it with a good quality sealer.I personally like Caswell and had good luck with it.The important thing is read the directions!Mixing it correctly is important and pre-heating the tank helps it flow.Other quality sealers are POR and Red Kote.One to stay clear of is the Kreem system,it will break down.If the tank is going to be painted use a mixture of half water and half muratic acid.It will work pretty quickly.Like somebody stated a good rinse out with baking soda should be done and the tank sealed quickly after drying.I know with the Caswell it will fix holes,just cover with duct tape.With good quality sealers and good coverage you shouldn't have any problems.Even if the tank isn't spotless.This is the method I used and has worked well for me on alot of tanks.

[atc007]

DEF needs a sticky!!!!!!!!!!!