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Author Topic: Gas Tank Rust  (Read 8784 times)

Offline Semper Gumby

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Re: Gas Tank Rust
« Reply #45 on: November 20, 2010, 07:54:35 AM »
I just ordered my second Caswell kit from Caswell.

Its easy and quick and there are no caustic fumes to avoid.  Muriatic acid and acetone to clean out the crud and then let the tank completly dry after the acetone.  Watch the paint!  Better to read the instructions below...

Goodluck.

http://www.caswellplating.com/aids/epoxygas.htm

Installation instructions here:

http://support.caswellplating.com/index.php?/Knowledgebase/Article/View/142/19/gas-tank-sealer-instructions
Bill Gould ?1980/03 R65 When at first you don't succeed....Moo!

Crossrodes

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Re: Gas Tank Rust
« Reply #46 on: November 20, 2010, 09:22:59 AM »
Interesting write up Bill.  Especially interesting is their mention of POR-15 and another product.  So who's to know what's best???  I have already ordered POR-15 (it's in the mail) but I will use acetone to clean out the tank.

Right now my tank has been soaking in vinegar for about a week and I'm seeing lots of flaking liner inside and lots of bare metal.  I guessing that I will not get all of the flaking paint out by simply draining the vinegar so I'm also thinking of flushing with water, drying it and then proceeding with the acetone and the POR products.

Also interesting is their use of drywall screws to get rust off.  Right now mine looks like the vinegar had dealt with the rust.

Offline Semper Gumby

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Re: Gas Tank Rust
« Reply #47 on: November 20, 2010, 09:27:50 AM »
No worries -- POR-15 get lots of good press.  I just don't like the caustic dope smells that go with products like Kreem and Bill Hirtch.  You will do fine with POR-15 I suspect.   [smiley=thumbsup.gif]

With ethanol its a new world in which what we knew may no longer apply.  What is important is that you are doing something about it.

PS - Let me know how the POR-15 requires forced air ventilation or not.
« Last Edit: November 20, 2010, 09:30:28 AM by Semper_Gumby »
Bill Gould ?1980/03 R65 When at first you don't succeed....Moo!

Crossrodes

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Re: Gas Tank Rust
« Reply #48 on: November 20, 2010, 10:38:35 AM »
I'll let you know.  

Offline Bob_Roller

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Re: Gas Tank Rust
« Reply #49 on: December 11, 2010, 02:56:25 PM »
Mike any progress to report on finishing up the fuel tank ?
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Crossrodes

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Re: Gas Tank Rust
« Reply #50 on: December 11, 2010, 09:48:24 PM »
Hi Bob.  

Yes, I finished it up.  I let the vinegar sit for a little over two weeks.  At first I was turning the tank every few hours to ensure I "treated" the whole tank then after about two days of this I let the tank sit for about a week without turning it.   Then I turned it and let it sit for another  week.  After this was done it appeared that the liner was loose (I had many large flakes floating around) so I emptied the vinegar and then hosed down the inside with pressure (just hose pressure).  I then dried the tank with a blow drier and then started with the kit that I had bought from POR-15.  I followed their instructions.  Before I put the paint in the tank I noticed I had a little flake of liner paint sitting in the crevice near the petcock outlet.  I couldn't retrieve it with a screwdriver or a piece of wood so I made up a fine suction hose using tubing that I attached to my shop-vac nozzlle.  This did the trick.

I applied the tank liner paint following the instructions and it all worked well.  The tank has been sitting now for about 10 days and is ready for use.  I did do some damage to the exterior paint and I will have to repair it or repaint it if the repair won't do the job...Other than that the re-line job was successful.  

Anybody want 24 litres of used vinegar? ::)  

GDeane

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Re: Gas Tank Rust
« Reply #51 on: December 11, 2010, 10:04:16 PM »
Guy at our local BMW shop told me to remove the red liner they fill the tank with small nuts and bolts, wrap it up in blankets and roll it in a clothes dryer for several hours.  Still not sure if he was pulling my leg.