how long for dry tank to shrink back?

Started by BK_856er, February 22, 2015, 11:23:46 AM

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ducatiz

it's not overpowering.  open a window, you're good.

the bad part is the xylene or acetone.  xylene is sweeter smelling.. mmmm.
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"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

BK_856er

Quote from: ducatiz on October 23, 2015, 05:33:58 PM
it's not overpowering.  open a window, you're good.

the bad part is the xylene or acetone.  xylene is sweeter smelling.. mmmm.

You're channeling your inner chemist!

BK

ute

so rinse with xylene or acetone ....screws......rinse again let dry

seal tank up ( saran wrap )

Cut down caswell with xylene or acetone ( by how much ??? )

pour in ...reseal opening ......swish around ( alot )( 10 -15 minutes )

pour out excess

let dry



does this sound correct ? any other tips or advice ?

Thanks guys 


BK_856er


ute

Perfect thanks ...don't know how I missed that in a search ......( Brain Cloud ...lol )

OrangeDragon

Quote from: OrangeDragon on February 25, 2015, 08:29:24 PM
I was able to buy a new plastic tank off of eBay.   I measured across the tank to the screw holes where the rubber mounts are attached.

New tank: from center line to center line of screw holes, it measured 11 3/8"
Swollen tank: from center line to center line of screw holes, it measured 11 3/4"

after three months, the old tank had not shrunk to match the measurements of the new tank.  i stopped checking after that and put the tank in storage about 6 months ago.  when and if it shrinks back, i will apply the caswell coating

i coated the new tank with caswell and hasn't expanded at all.  The only con to the coating was losing a bit of fuel capacity.

if you plan on coating, i recommend using one of the colored coatings so it will be easy to see what has and hasn't been coated.

well, it has been close to 2 1/2 years and I pulled my old expanded tank out of storage. It did shrink to match the brand new tank, so i decided to coat it. 

This time I used the caswell dragon's blood color instead of the clear.  I followed the same coating procedures as last time but the dragon's blood color performed different compared to the clear.

The dragon's blood color did not get as hot as the clear mix and thus it did not swirl around the tank as easy like the previous experience.  The red color performed like thick and slow like molasses.

I had to put more of the blood color mix in compared to the clear mix as I feared the slow swirl and lack of heat wasn't moving the coating around like the clear did. 

While I did not end up with missed spots like last time, there is a much thicker red coat in the tank compared to the clear coat, which equals lower fuel capacity.

IMO, I would recommend using the clear caswell coating instead of the red.   YMMV
2007 Monster 695 (153,000+ miles)

BK_856er

Bringing back my old thread!

My tank has been in storage (clean/dry/sealed/desiccant inside) for 2+ yrs.  Stopped shrinking long ago.  Finally motivated to do the Caswell treatment.

Turns out xylene is no longer available in California through normal retail channels.

Is there a known suitable replacement thinner that's easily obtained?

BK

booger

So what is the measurement screw hole CL to CL now after 2+ years?
Everybody got a plan 'till they get punched in the mouth - Mike Tyson

2001 M900Sie - sold
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BK_856er

Quote from: booger on August 14, 2017, 09:52:03 AM
So what is the measurement screw hole CL to CL now after 2+ years?

In my case, 293mm.

BK

ducatiz

As far as I can tell, the screw-hole diameter method is always going to result in different measures.  The tank is constantly shifting some depending on humidity and the manufacturing isn't that precise.  That's why the bumpers have about a 1cm shift built in.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

BK_856er

Quote from: ducatiz on August 14, 2017, 03:53:19 PM
As far as I can tell, the screw-hole diameter method is always going to result in different measures.  The tank is constantly shifting some depending on humidity and the manufacturing isn't that precise.  That's why the bumpers have about a 1cm shift built in.

Agreed.  The tank is not a precision part.  In my case it went from 299 to 293mm = 6mm shrinkage L/R with long term storage.  Most of that change occurred within the first 2-3 months.  What really annoyed me was the other dimension, front to back, making it impossible unlatch and lift the tank.  I didn't record that dimensional change vs. time.  Been off the monster for ~4yrs now, so looking forward to the reunion!

BK

ducatiz

Quote from: BK_856er on August 14, 2017, 07:09:15 PM
Agreed.  The tank is not a precision part.  In my case it went from 299 to 293mm = 6mm shrinkage L/R with long term storage.  Most of that change occurred within the first 2-3 months.  What really annoyed me was the other dimension, front to back, making it impossible unlatch and lift the tank.  I didn't record that dimensional change vs. time.  Been off the monster for ~4yrs now, so looking forward to the reunion!

BK


Same situation with the front/rear dims.  The tank hinge has about 1cm of adjustment.  But it should close without effort even with the hinge all the way to the front.

Play some Barry White when you put the tank on..
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

BK_856er

Procured some nice xylene from Amazon (thanks ducatiz!).  Tank was previously cleaned out and stored with desiccant for an eternity.  Spent a couple hours today scuffing up the interior surfaces with a stainless scouring pad and stainless detail brush.  Finally my small and thin arms come to the rescue.  Nitrile gloves and long-sleeve shirt so the surfaces wouldn't get contaminated.  Rinsed/agitated thoroughly with ~8oz xylene and removed.  Will air out tonight and do the actual coating tomorrow - planning to use the entire contents of the "motorcycle" kit cut with ~0.5 oz. xylene.

BK

BK_856er

Something went awry.  What did Tyson say?  Everyone's got a plan until they get punched in the face?

I added 30mL (1oz) xylene to part A and mixed it in well, then I added part B (colored, Dragon's Blood, more orange than red) and mixed for a continuous 10min.  Basically following ducatiz's excellent tutorial that describes what are effectively two coats.  Poured in half, then saw things were moving kinda slow for my taste after 15min and it didn't look like I was going to get complete 1st coat coverage with that quantity, so I went ahead and added most of the rest, which I had covered with aluminum foil after the initial mixing.  A few minutes later I thought I should "paint" the hoses and edge of the shelf ahead of schedule due to how things were behaving.  Damn the remainder in my container was suddenly super hot and already solidified!  Material in the tank was still flowing, but barely.  After about 3hrs the inside of the tank would leave a fingernail poke, but not a fingerprint, so basically done.

Although the xylene made the mixture much thinner as planned, it didn't seem to retard the cure rate much.  In this case I would have been much better off adding the entire portion initially and treating it like a single coat.

It's a perfect 75F day per the instructions.  I was super careful to scrape the sides and bottom to get good initial mixing (I'm a chemist, so I appreciate how important it is to homogenize the mixture when the components have different densities, etc.).  I don't know how to explain what happened and why the stuff in the tank kept flowing, but the portion in the mixing beaker took off like a rocket and hardened.  Hopefully the coating behaves and it got everywhere it needs to go.  My experience sounds a bit like OrangeDragon's from March of this year.

I have pics, but my hosting site is acting up, so I'll post later.

I usually like to do all my own work, but for the massive effort/anxiety/uncertainty involved, I'd happily pay a pro do this job!

BK




ducpainter

My personal opinion is that the reduction rate generally accepted for the Caswell coating is too low for what we're trying to accomplish with the PA-6 Ducati tanks. We're looking for 100% coverage, not the properties of the Caswell to repair perforated steel tanks, which is what it was designed to do.

From experience, the film thickness/volume greatly affects the cure. What is left in the mixing container will cure very quickly, while the material in the tank will seem to flow...forever.\

Thin it enough to get complete coverage in one coat, drain what you can, plan on where the excess will 'live' in the tank, and be done.

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