[bubba]

how do you get rust out of a gas tank? I called the local shop here and they said any auto parts store will carry stuff that will fix rust in a tank. well i drove to the auto parts store and the guys said he wishes he could find stuff to do that.

any ideas?

[half]

I have tried a bunch of stuff, but two things seem to work well.

1. If the rust is old and dry, the best I have found is sandblasting. I don't know if you have room to do this or not.

2. If it is wet rust or varnish. We mix up laundry soap and bleach, boil the hell out of it. Then swish it around in the tank, repeat, and then use clean water. Keep in mind these are coming from a simply country boy, so proceed at your own risk.

[Baketech]

What happened to the good old days when you just used "Creme"....

[CBR929RE]

http://www.por15.com/

[cbr99xx]

Originally Posted by Baketech

What happened to the good old days when you just used "Creme"....

Yep... That's what I used on the CB1100F I restored.

Not recommending this site (because I've never bought anything there) just showing the product...

http://www.motorhelmets.com/htm1/eng...vice-kreem.htm

[bubba]

Originally Posted by CBR929RE

http://www.por15.com/

have you used it?

[bubba]

Originally Posted by half

I have tried a bunch of stuff, but two things seem to work well.

1. If the rust is old and dry, the best I have found is sandblasting. I don't know if you have room to do this or not.

2. If it is wet rust or varnish. We mix up laundry soap and bleach, boil the hell out of it. Then swish it around in the tank, repeat, and then use clean water. Keep in mind these are coming from a simply country boy, so proceed at your own risk.

have you tried the Kreme or the other product listed above?

[CBR929RE]

Originally Posted by bubba

have you used it?

nope. I have the engine paintign kit but haven't done it yet. I was going to do it on a tranny but only got as far as cleaning it with their stuff (that worked great) and then handed it over to a friend to rebuild.

this guys has used the paint on his frame and other parts on his Monte Carlo
http://www.show-n-go.net/gfiles/por-15ss.html

I have heard that Kreem stuff is pretty good too.

[sheepofblue]

I used Kreem in the tank I got for my Ascot. The original was mint except the pin holes rusted through from sitting in a Michigan garage to long The replacement did not look as good and had rust but did hold gas So I added Kreem and it has been about 3 years

[G-Force Junkie]

I've used te Kreem and it works good. Its a 3 part kit, and the actualy white liquid is not really necessary unless you got pin holes or leaks. Otherwise, the first step is a weak acid solution to eat the rust and etch the metal. You could do the same with diluted pool acid. Plan on repainting the tank, your going to F up the finish. Pull the petcock out and fabricate a blockoff plate with aluminum and make a gasket to seal it when you bolt it on. Alot of do-it-yourself instruction talk about putting a handfull of nuts and bolts in there and shake the hell out of it to beat the rust off...This could work, but be sure the bolts can be poured out. Most streetbike tanks have a neck welded inside the fill hole making it impossable to just dump them out. I found this out the hard way Also, check out the Yamaha factory line of chemicals, they used to cary a tank conditioner...probaly diluted acid, a shop that carries the Yamaha stuff should be able to order it.

[sheepofblue]

Originally Posted by G-Force Junkie

I've used te Kreem and it works good. Its a 3 part kit, and the actualy white liquid is not really necessary unless you got pin holes or leaks. Otherwise, the first step is a weak acid solution to eat the rust and etch the metal. You could do the same with diluted pool acid. Plan on repainting the tank, your going to F up the finish. Pull the petcock out and fabricate a blockoff plate with aluminum and make a gasket to seal it when you bolt it on. Alot of do-it-yourself instruction talk about putting a handfull of nuts and bolts in there and shake the hell out of it to beat the rust off...This could work, but be sure the bolts can be poured out. Most streetbike tanks have a neck welded inside the fill hole making it impossable to just dump them out. I found this out the hard way Also, check out the Yamaha factory line of chemicals, they used to cary a tank conditioner...probaly diluted acid, a shop that carries the Yamaha stuff should be able to order it.

I didn't have to paint mine but yes it is VERY easy to hose up the paint.

[Rigor]

i've used "Kreme" many times in the past. it IS recommended for new tanks, so any moisture in the tank will not cause rust in the first place. the trick is to coat the inside of the tank evenly, and then work the kreme up to and around the filler neck, right where the paint begins/ends. sealing petcock ports can be done with a rubber plug. make sure to put something like a metal wire in small ports, like overflow tubes, as to not have them sealed up and the wire can be removed after the kreme dries. also.... use this stuff in a really well ventilated area. it's base is Methel Ethel Ketone. (MEK) it's highly toxic, and has a really low flash-point. (i believe it's -40 fahrenheit)

if the tank is that scaley in side, use sand and small stones, (no...not kidding) and swirl them around in there with water. it "sands" the inside of the tank and cleans alot of the crap out.

hose it out good and let it dry. when dry, use air to help clean out the remaining sand.

use the mild acid/degreaser that comes with the kit and follow the directions.

after that, dry it out good and use the actual Kreme. do it relatively soon, as to not allow rust to start forming again.

man.....i used this stuff on a 1936 Harley tank, (half) that was really bad, and it's still not leaking, 7 years later. good luck!!

[CBR929RE]

Originally Posted by Rigor

if the tank is that scaley in side, use sand and small stones, (no...not kidding) and swirl them around in there with water. it "sands" the inside of the tank and cleans alot of the crap out.

hmm sounds like aquarium gravel might do the trick nicely.

[Rigor]

Originally Posted by CBR929RE

hmm sounds like aquarium gravel might do the trick nicely.

yep... less the fish-poop, of course!!

[Johnny Diablo]

On My RZ350 someone used some liner stuff on it. The stuff ended up starting to flake at the fuel cap and started to plug up the works. I installed a fuel filter after the tap after chipping off and washing the all the loose crap outah the tank.

What I have heard about sandblasting is that the sand ends up in your filters if you are lucky. Stuff is hard to get out of your tank.

I have run into rusted tanks on numerous scooters. The best thing I have come across is to keep the tank full and install a filter right after the fuel tap.

After about 5 years 3 motors 6 cylinders and dont know how many miles.....wouldnt you know the tank stopped shedding rust.

Nother trick I used was to place a rare earth magnet on the bottom of the outside of the tank. Twice in 5 years I took the tank out and slid the magnet to the opening and removed the rust accumulation with it.

[CBR929RE]

Originally Posted by Rigor

yep... less the fish-poop, of course!!

well I was thinking of a fresh bag. a new bag will have some finer "dust" Iguess you can call it that has come off the rocks (you rinse the stuff before putting it into a tank to get rid of that) that way you have fine and course gravel to do its work. dual action sand paper so to speak

Originally Posted by Tombstone

Nother trick I used was to place a rare earth magnet on the bottom of the outside of the tank. Twice in 5 years I took the tank out and slid the magnet to the opening and removed the rust accumulation with it.

good idea. just like the magnet on the bottom of an auto tranny in a car.

[Red Rider]

Originally Posted by Tombstone

On My RZ350 someone used some liner stuff on it. The stuff ended up starting to flake at the fuel cap and started to plug up the works. I installed a fuel filter after the tap after chipping off and washing the all the loose crap outah the tank

FWIW, I've never used Kreme but I have heard that eventually it will start to flake. Not sure how long it takes before it happens though...

[Rigor]

for what it's worth:

in the cases where i've seen kreme peal, it's because the people applying it didn't get in on evenly, missing spots inside the tank. also, due to not taking the kreme high enough in the tank, as in up to the top of the filler tube.

again....this is only what i've seen. if you don't degrease the tank good enough, this will cause pealing and later problems. it's all in the prep work and application.

[cbr99xx]

Originally Posted by Rigor

for what it's worth:

in the cases where i've seen kreme peal, it's because the people applying it didn't get in on evenly, missing spots inside the tank. also, due to not taking the kreme high enough in the tank, as in up to the top of the filler tube.

again....this is only what i've seen. if you don't degrease the tank good enough, this will cause pealing and later problems. it's all in the prep work and application.

It's been four years on the 1100F and I've seen no problems. True enough... I don't own the bike anymore... but... I sold it (back) to my brother who, in turn, sold it to a friend.

I did "prep" the tank well. When using the "prep" I put a handfull of 1/4" nuts in the tank and shook them around to help dislodge any loose rust*. While coating the tank I made sure to have the mixture roll around the tank equally. I see no reason why this system shouldn't work if done correcty (worked for me).

*Edit: After reading Tombstone's post I felt I needed to clarify a bit. There weren't big chunks of flaking rust in the tank I treated. The 1/4" nuts acted like an agitator to loosen the surface (with some light pitting) rust in my tank.

[Johnny Diablo]

Guess what I was saying is toss a big car style cheap inline filter as close to the tank as possible and use the tank. If you have big flakes of rust....well you need a to find another tank. All the tricks and what not to try and get the stuff out .....is like spending 100% of your time and getting a 10% return.

[bubba]

i took it apart today and the entire inside of the tank is coated.