TANK LINER REMOVAL

[Nurse Julie]

Looks like i'm going to have too 

Yes, looking more that way now Paul but, you have spent bog all on that bike so far, so treat it to something nice and new 

[paul G]

I have its going to get four weeks rest one in June two in September and one in December 

[sprinta]

Well update on the liner removal or NOT.
Bought some neat MEK as below and had parts of the liner sat in it overnight.
Not a bloody thing happened, sure this stuff whatever it is would survive a nuclear blast

I think you will find that it is Methylen Chloride that is used to remove tank liners, that is what I was supplied with and it has worked for me, though there are so many tank liners that have been used over the years one cannot always be certain?

[paul G]

Everyone says MEK also on the USA site but I think i've given up and going to throw it in a furnace even though the tank will probably melt and leave the liner behind intact 

[Moorey]

Give it time. Not all chemical processes are instant. Overnight isn't long.

[Simon46]

My tank spent 2wks with a hydrochloric acid blend in it a a vintage radiator repair shop in denton next to an ancient harleys tank having the same treatment. It worked but the guy must be 70-80yrs old. He did a 1959 tank for me about 30yrs ago with 50 holes in it. Brazed every one. If he retires it will be a sad loss

[matthewmosse]

I would be tempted to first try a long soak in that nasty stuff, longer than overnight, failing that I'd resort to flushing thoroughly with hot water, removing cap and tap, then playing a blowtorch over it - see if that gets it peeling. - well ventilated area and a windy day so the wind carries fumes away, maybe a mask too. I've done soldering up rusty petrol tanks, and braze welding the holes, it works but is time consuming and braze welding does risk distortion, more do than soldering. After a few years I thought the tank was weeping so swapped it out for a spare I managed to source at a reasonable price ( about the value of the fuel it was full of) whilst using the repaired one. The braze welded tanks sat waiting for me to look if its worth having another go at.

[paul G]

Still NOTHING HAPPENING

[Nurse Julie]

Still NOTHING HAPPENING

NO NEED TO SHOUT
Order a new tank and then something will be happening 

[AshimotoK0]

The only time I have stripped out a tank liner was on a 500K0 tank. Not for the faint hearted and  definitely  off the scale as far as PC and HSE is concerned.

I tipped two 1k tubs of caustic soda  from the £1 shop into the fully dried out tank. Swished it around a bit and then at arms length I emptied a kettle of boiling water into it and dissapeared sharpish before the fury began. This is what came out when everything cooled off.  I am not sure how old the liner was or what type it was and bike was a USA import.

For stripping epoxy potting in electronics I have used hot Tetrahdrofuran (THF) but not so sure that's available to the DIY market.


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[paul G]

Still NOTHING HAPPENING

NO NEED TO SHOUT
Order a new tank and then something will be happening 

YES THERE IS

[Andych]

Older Radiator shops have really good dipping tanks... I had a tank done here and it was in there for 10 days.. when it cam out he checked for pinholes and soldered up anything that looked suspect.

[Erny]

Hi all,

refeshing this therad - my actual issue now on my CB550K1
Previous owner in US applied most probably Kreem liner or some other and result is bad - liner degraded, it is cracking, into full range of particles (bigger ones till small ones in form of kind of dust)
All in all, as consequnce, my petcock(s) is leaking and carbs too. There is quite some gasoline under bike overnigt.

I need to get reid of this f* liner to have clean tank...

So, question is, is there some definitive prooven method how to remove it from tank, while preserving tank outside (original) paint?
MEK?
POR-15 Stripper?
any other chemicals?


Attached pics of liner inside