fuel tank cleaning - good enough?

[toomanybikes]

So what did you use to get it there? Given the screens are removed I would consider lining it with Caswells or Redcote after your finished, to bond the remaining material and seal the tank interior. Use compressed air to blow the lines to clear them of the liner material when lining the tank.

Screen(s) were damaged by usual advice of "put some nuts & bolts in there, then shake".

Not yet sure if I will coat, need another round of Simple Green then Evaporust to get rid of the rust spots caused (possibly uncovered) by the 30 Second Cleaner.

[Track T 2411]

I had similar residue after cleaning my last 1100 tank. Tried most every chemical I had on hand, and nothing touched it. Found an old bottle of Zep oven cleaner, and gave that a try. Took the film off in a few minutes and slow agitation. YMMV.

[flyin900]

For the cost of the POR15 tank liner (buy only in a pint size) and not any of the larger more expensive kits, it will be enough to do that tank. For a pint in the US of the POR15 I found it for $25. from Eastwood supply It will ensure that the remaining material that you don't get off that inner surface doesn't eventually dissolve, messing up your carbs.

Gas and ethanol will likely work away at any remaining material on the inside of that tank. I have relined a few tanks and it is a fairly straight forward process. A compressor with an air tool will help to blow out the internal gas lines from any tank sealer that gets into there.

[toomanybikes]

I had similar residue after cleaning my last 1100 tank. Tried most every chemical I had on hand, and nothing touched it. Found an old bottle of Zep oven cleaner, and gave that a try. Took the film off in a few minutes and slow agitation. YMMV.

Was the Zep a liquid or spray foam? The foam seems to be most common but liquid would be better for this application.

Did you need to do any post Zep treatment, analogous to neutralizing acid using baking powder?

[gltriker]

For the cost of the POR15 tank liner (buy only in a pint size) and not any of the larger more expensive kits, it will be enough to do that tank. For a pint in the US of the POR15 I found it for $25. from Eastwood supply It will ensure that the remaining material that you don't get off that inner surface doesn't eventually dissolve, messing up your carbs.

Gas and ethanol will likely work away at any remaining material on the inside of that tank. I have relined a few tanks and it is a fairly straight forward process. A compressor with an air tool will help to blow out the internal gas lines from any tank sealer that gets into there.

I heartily agree with flyin900. POR15 is great stuff. (Paint Over Rust)

Look at my photos and text in this thread. Post#62.
viewtopic.php?f=30&t=39996&start=60

I said it was " Quite an ordeal", because totally derusting my GL1000 fuel tank with about a quart of swimming pool strength muriatic acid was my first time utilizing the liquid.

[toomanybikes]

I heartily agree with flyin900. POR15 is great stuff. (Paint Over Rust)

Look at my photos and text in this thread. Post#62.
viewtopic.php?f=30&t=39996&start=60

Thanks. Those images look good.

I have some POR15 on order. If I don't use it for the GL I bet some other current or future project in the garage will need it.

[Track T 2411]

Re: Zep cleaner, I used the liquid. IIRC, the zep is water based, so a water rinse and blow- dry followed by acetone, followed by RedCote sealer.

[toomanybikes]

For the POR15 advocates (gltriker, flyin900, et al), will it cover the current imperfect surface in my tank, once I clean off the MMO&diesel? I'd rather not add muriatic acid to the mix if not necessary.

Pic below is the latest status.

PXL_20210313_112112608.jpg (195.28 KiB) Viewed 302 times

[gltriker]

Yes I believe it will.
It has been 9 years since I prepped and coated my GL1000 fuel tank with a POR15 kit.
If you haven't already seen the Motorcycle Tank Sealing Kit installation instructions, go to the POR15 website.
See the contents of the complete kit there.

I utilized muriatic acid, before the POR15 kit's liquids, because I had little confidence my investment in the cost of the kit would give me a good return on the end results, without first stripping the fuel tank internals to bare metal.

Removing loose rust and all traces of petroleum contamination AND the metal including the inside diameter of both pickup tubes, must be entirely bone dry before the POR15 tank coating liquid is poured into the tank are the main details that I recall.

The most notable witness of the POR15 coating's endurance is that the inside of my tank's filler neck isn't scarred by hundreds of insertion and removal of gas pump handle spouts over 32,000 miles since I coated the trike's tank.

[Sidecar Bob]

When my GL500's tank rusted through in '03 I could have bought a kit and done it myself but for about the same price I took it to a local rad shop and they soldered up the holes and epoxy lined it. They did all the prep and dealt with all of the nasty chemicals and fumes and all I had to do was touch up where the tape they sealed one of the openings pulled off some paint, which wasn't a big deal because I had to repaint the area where the holes were anyway.
That same tank has been on my current winter machine since '06 (over 120,000 KM between the 2 bikes) and still holding up nicely.

[gltriker]

So what did you use to get it there? Given the screens are removed I would consider lining it with Caswells or Redcote after your finished, to bond the remaining material and seal the tank interior. Use compressed air to blow the lines to clear them of the liner material when lining the tank.

Screen(s) were damaged by usual advice of "put some nuts & bolts in there, then shake".

Not yet sure if I will coat, need another round of Simple Green then Evaporust to get rid of the rust spots caused (possibly uncovered) by the 30 Second Cleaner.

Question. I see one fuel delivery tube. What machine is this tank mounted on?

[toomanybikes]

Question. I see one fuel delivery tube. What machine is this tank mounted on?

It's an '81 GL1100. It has two delivery tubes but you only see the reserve tube because pic is from the fuel gauge opening.

[flyin900]

Your ready now with that surface and what a difference from your initial results. KUDO'S to avoiding the Muriatic acid treatment and still getting a good result.
So a quality sealing kit will have that tank ready for service again.

[toomanybikes]

Your ready now with that surface and what a difference from your initial results. KUDO'S to avoiding the Muriatic acid treatment and still getting a good result.
So a quality sealing kit will have that tank ready for service again.

I just bought the POR15 sealer, not the full kit. I plan on using the variety of chemicals already in the garage (acetone, OMS, alcohol, simple green, CLR, etc.) to get the insides perfectly clean and dry.

Is there anything magic to the POR15 prep chemicals that I'm missing?

[gltriker]

Your ready now with that surface and what a difference from your initial results. KUDO'S to avoiding the Muriatic acid treatment and still getting a good result.
So a quality sealing kit will have that tank ready for service again.

I just bought the POR15 sealer, not the full kit. I plan on using the variety of chemicals already in the garage (acetone, OMS, alcohol, simple green, CLR, etc.) to get the insides perfectly clean and dry.

Is there anything magic to the POR15 prep chemicals that I'm missing?

https://www.por15.com/por-15-metal-prep

A bottle of This metal prep liquid was included in the POR15 Motorcycle Tank Sealing Kit I installed in my GL 1000 tank.

Scroll down that page to the product description.
That's all I can offer to answer your question.

Edit:
Amazon has it.
https://www.amazon.com/POR-15-40204-Met ... 147&sr=8-3

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