Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: paul G on March 04, 2019, 11:41:05 AM
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Hi all,
As title I have a tank that has been lined, this must have been more than 30 yrs ago as the bike was taken off the road in 1983.
This is now coming off and looks to be clear ish light brown so not sure what/which brand it was.
I have tried various chemicals on it but no luck Acetone, Thinners, Starchem paint remover and nothing will touch it.
Also talked to a couple of dip and strip companies but they will not guarantee their dipping chemical will work.
I have also talked to a local company I use for powder coating they have a dipping tank to remove old powder coat and he has tried a couple of times with tanks he has and it did not remove it.
So just wondering if anyone has a miracle cure to get the bloody stuff out.
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The US site recommends MEK (Methyl Ethyl Ketone)(nasty stuff...read the warnings), but maybe that's already been tried.
I have a pristine tank with a very poor Kreem liner. Someday I'm going to have a go with acetone on that.
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The US site recommends MEK (Methyl Ethyl Ketone)(nasty stuff...read the warnings), but maybe that's already been tried.
I have a pristine tank with a very poor Kreem liner. Someday I'm going to have a go with acetone on that.
Acetone did nothing on mine :( P.S do you want to buy 5lt ;D ;D
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Plumbing supplies for plastic pipe joint chemicals should get you a convenient supply of mek solvent to try and dissolve a sample.
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Be careful with MEK it is used in my industry (Aviation) and will knock you out with the vapours, good stuff tho ;D
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Be careful with MEK it is used in my industry (Aviation) and will knock you out with the vapours, good stuff tho ;D
:o :o :o ;D
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Yes, as with any flamms, I'd do that outside to reduce risk of inhalation and combustion problems ;D
Another to try if that doesn't touch it, you can readily buy methanol from model rc nitro-motor suppliers.
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Be careful with MEK it is used in my industry (Aviation) and will knock you out with the vapours, good stuff tho ;D
MEK is not to be Fu**ed with - but it should get the liner out.
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Be careful with MEK it is used in my industry (Aviation) and will knock you out with the vapours, good stuff tho ;D
MEK is not to be Fu**ed with - but it should get the liner out.
How much in a tank James do the fumes work in it as well as the liquid !
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I got some MEK on eBay from Switzerland to remove the paint from the inside of my CB750's bearing journals, after recommendations on here. You can't get it in the EU, apparently, because it has killed people with the fumes. It worked a treat but I also bought a mask and goggles.
As far as liners go, my 750 tank had a blister from petrol getting though a small pinhole, so Menno removed the old failed liner with an acid bath dip and applied a new one, which also subsequently failed.
Analysis shows that the new liner had reacted with traces of the old one, which had survived in the original hole. The solution ended up being a new tank from Silvers, surprisingly good value (and quality) and no more grief.
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I used some at work back in the eighties and almost fell off a 20 feet stand under a wing, I don't remember what happened but didn't mind as I became quite spaced out! Can you imagine that happening nowadays!
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Its readily available in this country and widely used in industry as a solvent /cleaner. Plumbers use it all the time on plastic pipework. Use sensibly as you would Acetone or any such like and you will be ok. I would think it will remove your liner. You might have to leave it in while. Some of your rubber seals might not like it. I've worked with it most of my working life. Use in a well ventilated area.
https://www.ebay.co.uk/p/SHL-5-Litre-Pure-Methyl-Ethyl-Ketone-MEK-Butanone/1050938230?iid=371481665763&chn=ps
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I used some at work back in the eighties and almost fell off a 20 feet stand under a wing, I don't remember what happened but didn't mind as I became quite spaced out! Can you imagine that happening nowadays!
You shouldn't actually shove your nose in the can. Its not the wisest of moves. I've seen it done many times." Cor that stinks" then they pick it up and sniff it. Usually followed by "#@%$ me!!! what's that."
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Just don't let it, or its vapour get on yer Ball's.
Or you will be in a World of Pain.
Believe me!
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Just don't let it, or its vapour get on yer Ball's.
Or you will be in a World of Pain.
Believe me!
See what I mean people do the strangest of things. But everyone should have a hobby. ;)
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Just don't let it, or its vapour get on yer Ball's.
Or you will be in a World of Pain.
Believe me!
Aftershave or deep heat apparently are just as risky for that part of your anatomy.
Funny where these threads lead to isn't it ;D
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I once got some resin on my glasses. So I got a rag soaked in MEK to clean them. However. I didn't realise that a loose end of the rag was hanging down my front. Until I felt a warming sensation. The all hell broke loose!
I have extensive experience of working with MEK, Acetone etc. But I learnt from that mistake quite soon.
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I wasn't going to ask, what sort of Catholic activities you were involved in to find that out ;D ;D ;D
A friend was trying to syphon some coolant out of his engine to check anti-freeze concentration, mis-judged it, and in a reflex action swallowed a load of it.
Went to a+e and they stomach pumped him. They couldn't stop laughing though as he is a policeman :D
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Well see below some pieces of the old loose liner.
I have bought the plastic pipe weld as recommended which is full of MEK and it has been soaking in it overnight.
Will let you know what happens later fingers crossed.
(https://i.imgur.com/s2jfJC3.jpg)
(http://i.imgur.com/jYUJLm0.jpg) (https://imgur.com/jYUJLm0)
(https://i.imgur.com/GU0DzOG.jpg)
(https://i.imgur.com/tVmGb0C.jpg)
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That's a can of the solvent glue isn't it, and what you required was the MEK solvent pipe cleaner to remove the liner. Don't put that in your tank. Just buy a bottle of MEK then you know you have what you want.
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hi that tank liner looks a lot like petseal it was used a lot years ago and before they put ethanol in the petrol if not removed it will only keep breaking down so good luck with that ;)
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Just get some of this - don't stick the PVC pipe glue in your tank or you'll be knackered..
https://www.ebay.co.uk/itm/SHL-1-Litre-1000ml-M-E-K-MEK-99-9-CHILD-PROOF-CAP/391314130022?hash=item5b1c23c466:g:wo0AAOSwldRZ7TqR&frcectupt=true
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That's a can of the solvent glue isn't it, and what you required was the MEK solvent pipe cleaner to remove the liner. Don't put that in your tank. Just buy a bottle of MEK then you know you have what you want.
Moorey
It isn't going in the tank this product is MEK but used to glue plastic pipes together.
It is being used to see if it has any effect on the liner before I lash out £30 on MEK as I did with the Acetone :( :(
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Just get some of this - don't stick the PVC pipe glue in your tank or you'll be knackered..
https://www.ebay.co.uk/itm/SHL-1-Litre-1000ml-M-E-K-MEK-99-9-CHILD-PROOF-CAP/391314130022?hash=item5b1c23c466:g:wo0AAOSwldRZ7TqR&frcectupt=true
Thanks James as above I wasn't putting that in the tank just a test to see if the MEK works as the Acetone didn't.
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That's a can of the solvent glue isn't it, and what you required was the MEK solvent pipe cleaner to remove the liner. Don't put that in your tank. Just buy a bottle of MEK then you know you have what you want.
Moorey
It isn't going in the tank this product is MEK but used to glue plastic pipes together.
It is being used to see if it has any effect on the liner before I lash out £30 on MEK as I did with the Acetone :( :(
I have never known pure MEK to be used as pipe glue. Pipe glue contains MEK as a ingredient. Is its consistency just like pouring thinners, that's what MEK is like. Just want you to get the right stuff as in James's link.
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You'll see soon enough if the glue has any effect on the liner, so at least it'll show if mek is any use.
We used both solvent and mek based glue on chemical pipework in factories. As we had fairly hefty static loading from large header supply tanks, we'd routinely clean to prepare glued junctions etc by wiping with straight mek, then apply the cement for final assembly to ensure long term joint integrity. Some of the control valves were assembled using silicone lubrication on seals which if left present caused the joints to default.
Also straight mek used to dilute the cement if left open too long and went too sticky.
Acetone I think, will dissolve resin based materials prior to catalysed hardening, as for example brush cleaning in fibre glass workplaces. Once set though, it's much harder to change its status.
The pipe cement will glue some of the bike plastics. Just rub a test patch on the back of a cracked side panel to see if it's receptive to mek base.
You can also reinforce the back side with cotton scrim and resin or epoxy to support a cracked area. For cotton scrim you can use old well washed thin T-shirt material :)
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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 >:( >:( >:(
(https://i.imgur.com/wnV63pK.jpg)
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Buy a new tank Paul....you know it makes sense ;)
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Looks like i'm going to have too >:( >:(
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It's looking like it.
Try searching "dissolving polyester resin" as it discusses this sort of thing. The commonly suggested types you've already been through, it's very resistant to most.
Battery acid if you have any could be tried on sample.
Seems acetic used at 190dgrees may be possible, it all gets much more serious unless you routinely handle this stuff though.
What about a commercial acid dripper that do car body etc? As a line of enquiry.
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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 ;D :D :D ;D :D
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I have its going to get four weeks rest one in June two in September and one in December 8) 8)
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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 >:( >:( >:(
(https://i.imgur.com/wnV63pK.jpg)
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?
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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 >:( >:(
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Give it time. Not all chemical processes are instant. Overnight isn't long.
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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
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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.
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Still NOTHING HAPPENING >:( >:(
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Still NOTHING HAPPENING >:( >:(
NO NEED TO SHOUT
Order a new tank and then something will be happening ;D
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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. ;D ;D
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.
[attachimg=1]
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Still NOTHING HAPPENING >:( >:(
NO NEED TO SHOUT
Order a new tank and then something will be happening ;D
YES THERE IS >:( >:( >:( :D
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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.
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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