Coke didn't do it

Clear the interior rust from an old petrol tank, that is. Left it there
for two or three days, but no joy.

Any ideas for the next step?

 

In communiqué <1jxlhgl.s0tqmbjfy0jaN%>,

Full Por-15 treatment.

--
+-------------------------------------------------------------------+
| Pete Fisher at Home: |
| Aprilia Shiver Yamaha WR250Z/Supermoto "Old Gimmer's Hillclimber" |
| Gilera GFR * 2 Moto Morini 2C/375 |
+-------------------------------------------------------------------+

 

Ask crn and then do the exact opposite.

 

Mild Caustic soda.

I've been told, but never tried it. That's what they did in the "Shop"
years ago when I worked there.

 

I wouldn't expect it to. They tested it on Mythbusters IIRC and it
didn't do half of the things it's rumoured to be able to do.

Ummm no not really. Swill some Rusteater around?

 

A proper phosphoric acid based rust remover rather than an expensive
soft drink?

Then maybe add a couple of bottles of NOS?
http://www.gixxer.com/forums/showthread.php?t=226570

 

What he said. If it's bad enough to worry about, it's bad enough to
have left some very thin spots of metal, so it'll only be a matter of
time before it sprouts a leak.

 

Certainly won't be a turnip for the books

 

Well, this was a pikey Lidl six-2 litre-bottles-for-under-three-quid
deal, so perhaps it'd have worked better if I'd tried The Real
Thing

Oh yes, I remember that thread. Quite marvellous.

 

As sung by Prince? He eventually became a King Edward...

 

I posted this in 2001 but here it is again if it makes you laugh:


Around 1986, I was given a 250 MZ for a winter hack. It had only done
1,800 miles but had stood in the guys front garden for 2 years after he
died, his wife gave it to me. Some one early on had nicked the spark
plug and the tax disc. (Well it was south east London, the bike was
chained to a large ground anchor.) I was working at the local Uni at the
time and talked to the Chemistry Dept to come up with some thing that
would dissolve the rust that had fuzed the piston in to the bore, which
they did. Pour it in and leave it for a day or two were the
instructions. But do it out side in the open as it's based on ether.


Grand National day everyone except me is watching the TV, I working on
the bike.


The stuff worked a treat. Freed up the piston cleaned everything a
treat. Dissolved the rust. OK thinks I, I'll kick it over till every
drop of the stuff is out and put the head on and try it.


Reassemble the bike. Turned everything on. On the second kick there was
a God Almighty explosion. A 4 foot flame shot out of the exhaust, the
fumes under the piston exploded and as the engine rotated backwards it
threw me over the bars and broke my ankle. Family come out to find me
jammed up against the side of the shed arse in the air feet hooked over
the bars.


Then there was the tale about the 18 months trying to get my ankle
mended on the NHS if any one wants to hear that one.

 

I think UKRM is a bit more John Motson.

 

heh

 

Shouldnt laugh, but I'm gonna ))

 

First remove drain tap, filters etc.
Bung in a mugfull of small sharp gravel, close fuel cap, and shake
around violently until your arms hurt. Repeat as required.
Have fun shaking out the last lump of gravel.
Now apply Petseal or your favourite sealant, job done.

 

**** off - my method works.

 

'the resulting explosion could be heard from Alabama'

 

Yes - dunk it in a solution of black treacle dissolved in water for 3
weeks.
All the rust will have gone , leaving bare steel
Steve

 

I've tried that in the past, and while it does indeed dislodge the
rust (I've always used an assortment of old nuts and bolts rather than
gravel), the amount of shaking required is more than you'd believe.
ISTR someone here rigged his tank up to a cement mixer, and let that
do the work, and it still took hours.

So in my experience, it falls into the 'use Coca-Cola' mythology
bracket.

 

You should forget about what used to work pre-ethanol & do a bit of
research. If you do, you'll know not to use Petseal, & discover that
POR-15 seems the most durable of the easily available products in the
UK. And if you read the instructions for POR-15, you'll realise why you
shouldn't fill the tank with gravel & give it a good shake.