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Old 03-20-2012, 06:55 AM   #1
tlux OP
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Tank Liner

Hey Guys

In the next few weeks I will be painting the body work on my 1976 R90/6. While I have the current crappy paint, I have been advised to go ahead and reline/coat the inside, which makes sense. The process can get messy and I would hate to mess up my new paint in the future. However, I am not having problems with rust or the factory liner. So, do you think I should do the "preventative maintenance"? or "if it ain't broke, don't fix it"? If you recommend that I do it, what should I use? POR-15? Redcote? etc.

Thanks
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Old 03-20-2012, 07:28 AM   #2
kantuckid
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No to Kreem! Yes to Por-15! If you decide to do it, but why if there's no rust? Keeping it full will avoid issues...my suggestion is to look inside with a device...
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Old 03-20-2012, 07:38 AM   #3
Unstable Rider
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What ever you do, if you coat it, do it BEFORE you have the exterior painted.

+1 for RedKot.

Do not use KREME
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Old 03-20-2012, 07:50 AM   #4
Crazy_Dave
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Por-15
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Old 03-20-2012, 07:53 AM   #5
SpeedwayRN
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Caswell
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Old 03-20-2012, 08:33 AM   #6
squiffynimrod
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Use the POR, or else we'll ignore.
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Old 03-20-2012, 08:39 AM   #7
wirewrkr
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Why are you relining if the original is fine?
No offense, but stop listening to whoever told you to do it, that's the silliest thing I ever heard. Nothing worked as well as the original lining. Period.
Keep the original and take care of it by not letting water sit in it and keeping gas rotating through it.
If it is going to sit unused, drain it thoroughly first.
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Old 03-20-2012, 08:51 AM   #8
bmwloco
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Took a leap o' faith and cleaned an old BMW RS tank with PinSol, then rinsed it, dried it, and added gas.

In line filters look clean, and the bike runs... but fill the tank over 1/2 and it leaks. Looks like POR15 for this old beater.

Or just travel with a half a tank and a SIGG fuel bottle in the tail pack.
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Old 03-20-2012, 10:39 AM   #9
chasbmw
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Better to drain down tanks every couple of years and remove all the crud and water that sits below the fuel pipes.

If the tank needs relining make sure that the liner manufacturer wil Gtee that the stuff will resist ethanol. Lots of problems in the UK with fuel eating either liners or Fiberglass fuel tanks.

Charles
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Old 03-20-2012, 03:34 PM   #10
danedg
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Old 03-20-2012, 07:40 PM   #11
Boon Booni
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We want to see some photos down the filler neck!
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Old 03-20-2012, 07:42 PM   #12
Boon Booni
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Quote:
Originally Posted by bmwloco View Post
Took a leap o' faith and cleaned an old BMW RS tank with PinSol, then rinsed it, dried it, and added gas.

In line filters look clean, and the bike runs... but fill the tank over 1/2 and it leaks. Looks like POR15 for this old beater.

Or just travel with a half a tank and a SIGG fuel bottle in the tail pack.
You have pinhole leaks or something? I'm not sure I'd expect a liner to plug a leak.
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Old 03-21-2012, 04:24 PM   #13
AK Bob
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Por 15

Do the tank relining BEFORE the PAINT.

I LEARNED the Hard way.. Got traped by time gambeled and lost. May even have pics over on BMWMOA airhead rebuild link.

Wear over kill eye protection too! The plug popped, and I caught it with my face, and got real LUCKY. That stuff does burm!

It is great stuff.
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Old 03-21-2012, 04:29 PM   #14
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+1 for Caswell
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Old 03-21-2012, 04:34 PM   #15
rambozo
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por 15

por 15 claims to fix pinholes if you paint it on inside and out, the kit i got had a mesh to cover holes on the outside, which you then paint over with por

my tank had no leaks so i cant verify if it works on that score but i was very impressed with the kit, it included a cleaner, acid etch and por 15, it was pretty dear but i'll definitely use it again
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