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Caswell Info Requested for Coating of new Tank

Started by EEL, December 22, 2011, 11:21:00 AM

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Lieutenant Dan

#75
June 20, 2012, 10:04:15 AM
Quote from: ducatiz on June 20, 2012, 09:49:31 AM
Like I said, the new covered tank design hides the expansion of the tank.  They can easily make the tank smaller to allow for more expansion and possible redesign the fuel pump flange so it is reinforced and can't leak.

Yes, but still. Doesn't that sound like fixing the symptoms and not the problem? That sounds like bad engineering at the school I went to.
'07 695

ducatiz

#76
June 20, 2012, 10:14:42 AM
Quote from: C11Gidasi on June 20, 2012, 10:04:15 AM
Yes, but still. Doesn't that sound like fixing the symptoms and not the problem? That sounds like bad engineering at the school I went to.

well, engineering is only half of the picture, the bean counters have to have a say too.

i mean.. the camel was designed by engineers in committee you know.. works great... looks like shit.
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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.

ducpainter

#77
June 20, 2012, 10:51:35 AM
The business climate in Italy being what it is...

I wonder if there are contractual issues between Ducati and Acerbis?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
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Betlog

#78
August 23, 2012, 10:43:12 AM
When thinning, I am told that I can use lacquer thinner instead of Xylene.  Do you guys think there's any advantage to Xylene over lacquer thinner?

ducatiz

#79
August 23, 2012, 11:00:20 AM
Quote from: Betlog on August 23, 2012, 10:43:12 AM
When thinning, I am told that I can use lacquer thinner instead of Xylene.  Do you guys think there's any advantage to Xylene over lacquer thinner?


Yes.  Xylene is compatible with PA6 nylon.  "Lacquer thinner" is not a specific substance, it can be any number of solvents, some of which may not be compatible with PA6.
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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.

Betlog

#80
September 05, 2012, 08:48:44 AM
Quote from: ducatiz on August 23, 2012, 11:00:20 AM

Yes.  Xylene is compatible with PA6 nylon.  "Lacquer thinner" is not a specific substance, it can be any number of solvents, some of which may not be compatible with PA6.

Thanks.  I ended up using Xylene.

Betlog

#81
September 05, 2012, 08:57:31 AM
So I have the tank curing but don't know what to do with the excess Caswell that has started down the fuel flange when I drained the tank.  My plan is to trim it with an Exacto knife but am not sure how far to go.  Did you guys trim it flush to the plastic in the gas tank?  (This way, the fuel flange will sit in perfectly with the fuel flange gasket and fuel filter bits when it's re-installed.)  My other option was to trim it flush, then coat a bit of Caswell at the bottom to make sure that if gas does go past the gasket, it would not leak into the plastic.  (The problem with this is that the gasket and fuel filter bits may not sit flush when it's re-installed.)  Thoughts?

ducpainter

#82
September 05, 2012, 09:02:21 AM
Quote from: ducatiz on August 23, 2012, 11:00:20 AM

Yes.  Xylene is compatible with PA6 nylon.  "Lacquer thinner" is not a specific substance, it can be any number of solvents, some of which may not be compatible with PA6.
Do you have a list of solvents that are known to be incompatible?

Lacquer thinner is all organic solvents and PA6 is touted to have excellent resistance to all organic solvents.

I would think that water content of cheap thinner would be more of a concern.

FTR, I use urethane grade reducer to thin the Caswell because it specifically contains no water.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


ducatiz

#83
September 05, 2012, 12:19:03 PM Last Edit: September 05, 2012, 03:29:56 PM by ducatiz
I have a chemical compatibility chart..  i can post the link later. Caswell either read my thread or figured it out too as its named in their instructions for reducing their stuff.

Here is the online version.  Select materials=Nylon and ALL for Chemicals

http://www.coleparmer.com/Chemical-Resistance

Notably, Ethanol is resistant up to 72 deg F...
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.

ducatiz

#84
September 05, 2012, 12:21:07 PM
Quote from: Betlog on September 05, 2012, 08:57:31 AM
So I have the tank curing but don't know what to do with the excess Caswell that has started down the fuel flange when I drained the tank.  My plan is to trim it with an Exacto knife but am not sure how far to go.  Did you guys trim it flush to the plastic in the gas tank?  (This way, the fuel flange will sit in perfectly with the fuel flange gasket and fuel filter bits when it's re-installed.)  My other option was to trim it flush, then coat a bit of Caswell at the bottom to make sure that if gas does go past the gasket, it would not leak into the plastic.  (The problem with this is that the gasket and fuel filter bits may not sit flush when it's re-installed.)  Thoughts?

Cut a small line and use a plastic scraper.  You can sand it too.  Small deviation is OK.  There is a fat o ring there.  Grease up the oring before install.
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.

Betlog

#85
September 05, 2012, 01:50:47 PM
Quote from: ducatiz on September 05, 2012, 12:21:07 PM
Cut a small line and use a plastic scraper.  You can sand it too.  Small deviation is OK.  There is a fat o ring there.  Grease up the oring before install.

Thanks ducatiz.  Where do you cut the line?  What I'm getting from your post is that it is fine to just cut out the excess and make the bottom that mates to the gasket and fuel filter bits flush.  No need to re-apply the coating at the bottom of the tank.  Is that correct?  Also, what grease should I use?

ducatiz

#86
September 05, 2012, 03:34:06 PM
Quote from: Betlog on September 05, 2012, 01:50:47 PM
Thanks ducatiz.  Where do you cut the line?  What I'm getting from your post is that it is fine to just cut out the excess and make the bottom that mates to the gasket and fuel filter bits flush.  No need to re-apply the coating at the bottom of the tank.  Is that correct?  Also, what grease should I use?

I cut the line right at the corner.  You just want to make a score so when you scrape it doesn't chase into the inside of the tank.

Any gasoline resistant grease compatible with rubber.. (LOL).. I have a tub of this stuff called Krytox which IIRC is a silicone grease specifically for Orings.  You don't need much, you are just lubing the oring so it grabs and seals.  You may not even need it.  You can probably use brake assembly grease which is a silicone grease.
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.

Betlog

#87
September 06, 2012, 06:54:47 PM
Did you guys also coat the fuel filler area - both inside the tank and what is visible from the fuel door?

ducatiz

#88
September 07, 2012, 06:03:53 AM
Quote from: Betlog on September 06, 2012, 06:54:47 PM
Did you guys also coat the fuel filler area - both inside the tank and what is visible from the fuel door?

I use a rubber stopper that fits the filler hole almost exactly (and make sure to plug the overflow hole).

that prevents the coating from getting to the exposed part of the filler, but it coats the inside part just as any other part of the tank.

The filler nozzle isn't nylon.  I believe it is HDPE which will present a problem with adhesion over time.  I try to scrape the coating away from it.
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.
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