Removing JB Weld?

Anthony wrote:

"UltraJohn" wrote in message
ink.net...
My only experience is with motorcycle tanks and filling with water really
sucks the heat out making it hard to weld to!
John

Same here. When I weld bike tanks I pump compressed air through the petcock
hole and work with the gas cap off and the hole pointed in a safe direction.
With a constant air flow fumes can't build up and the worst you're going to
get is a flash out where the air is escaping. I've done this dozens of
times with only a couple flashes like I was expecting not that it doesn't
startle me when it happens.

I don't know how big your tank is but if you can freeze it (-0 F.) then you
should be able to get the J.B. Weld to break out easily.

Tony

An interesting idea.
My fridge won't do that low.
Maybe a box full of dry ice?

"Richard Lamb" wrote in message
...
Anthony wrote:

I don't know how big your tank is but if you can freeze it (-0 F.) then
you
should be able to get the J.B. Weld to break out easily.


An interesting idea.
My fridge won't do that low.
Maybe a box full of dry ice?

Or a really big CO2 cartridge. An upside down can of air like used for
dusting out computers held upside down will squirt liquid CO2 at around -100
F. If you try this wear a very thick and well padded glove.

Tony

Epoxy softens with heat. Heat the part to several hundred degrees
and use a rotary wire brush on a drill to remove the epoxy.

If the tanks exit flange hole size to internal volume is small 20%
you will have to use inert gas inside while heating or the explosion
will not be a good thing.

John


On Wed, 14 Jul 2004 13:33:42 GMT, Richard Lamb
wrote:

The oil tank o this particular A-65 has a small leak near the
mounting flange. The owner has repeatedly applied JB Weld in
an effort to stop the leak, but without much sucess.

So we are going to try brazing the thing, but first have to
remove a pound or so of stickum.

Any suggestions on what NOT to do???


Richard

Capt.Doug wrote:

"Richard Lamb" wrote in message So we are going to try brazing the
thing, but first have to remove a pound or so of stickum.

Torch it! I used JB Weld to fill in some dished pistons to increase the
compression ratio. It worked great for a few minutes until it burned off.

D.


Man I hope that was tongue-in-cheeck!
John (dunking the scrapnel) P. ;-)

"Richard Lamb" wrote in message So we are going to try brazing the thing,
but first have to remove a pound or so of stickum.

Torch it! I used JB Weld to fill in some dished pistons to increase the
compression ratio. It worked great for a few minutes until it burned off.

D.

Anthony wrote:

"Richard Lamb" wrote in message
...
Anthony wrote:

I don't know how big your tank is but if you can freeze it (-0 F.) then
you
should be able to get the J.B. Weld to break out easily.


An interesting idea.
My fridge won't do that low.
Maybe a box full of dry ice?

Or a really big CO2 cartridge. An upside down can of air like used for
dusting out computers held upside down will squirt liquid CO2 at around -100
F. If you try this wear a very thick and well padded glove.

Tony


I've heard this old saw so often even I was beginning to believe it.
While it is based on fact, it's not seriously practical.

When released (in)correctly, it is true that a CO2 extinguisher will
make a pile of dry ice. But it's a very small pile compared to the
amount of CO2 gas released. It would have to be a Very Very Big (TM)
can in order to chill a that big of a slug of steel to below 0.

Simple thermodynamics, dudes.


Richard (woolly coat and all) Lamb

Capt.Doug" wrote:

Torch it! I used JB Weld to fill in some dished pistons to increase the
compression ratio. It worked great for a few minutes until it burned off.

D.
+++++++++++++++++++++++++++++++++++++++++++

I use to think of you as one smart and savvy dood.
Oh well, time to look for another hero. g


Barnyard BOb -

In Capt.Doug
wrote:
"Richard Lamb" wrote in message So we are going to try brazing the
thing, but first have to remove a pound or so of stickum.

Torch it! I used JB Weld to fill in some dished pistons to increase
the compression ratio. It worked great for a few minutes until it
burned off.

The fact that it lasted as long as it did says a lot about the tenacity
of JB weld. Was any damage done when it burned off?

----------------------------------------------------
Del Rawlins-
Remove _kills_spammers_ to reply via email.
Unofficial Bearhawk FAQ website:
http://www.rawlinsbrothers.org/bhfaq/

Or a really big CO2 cartridge. An upside down can of air like used for
dusting out computers held upside down will squirt liquid CO2 at around -100
F. If you try this wear a very thick and well padded glove.

Tony

Liquid CO2? Are you sure that those computer dusting cartridges arent
using some sort of flourocarbons?





I've heard this old saw so often even I was beginning to believe it.
While it is based on fact, it's not seriously practical.

When released (in)correctly, it is true that a CO2 extinguisher will
make a pile of dry ice. But it's a very small pile compared to the
amount of CO2 gas released. It would have to be a Very Very Big (TM)
can in order to chill a that big of a slug of steel to below 0.


Discharging a CO2 extinguisher does not generate dry ice. The
expansional cooling of the compressed gas causes moisture in the air to
condense and freeze. The ice generated is the typical wet variety. Check
your sources.


Simple thermodynamics, dudes.

Sounds oversimplified.



Richard (woolly coat and all) Lamb

Dave

"Dave S" wrote in message
nk.net...


Or a really big CO2 cartridge. An upside down can of air like used for
dusting out computers held upside down will squirt liquid CO2 at
around -100
F. If you try this wear a very thick and well padded glove.

Tony

Liquid CO2? Are you sure that those computer dusting cartridges arent
using some sort of flourocarbons?

Yep, chlorofluorocarbons are banned.

Tony