Dry ice, sound deadning removal

[Axel]

I did this on my TA22 just last weekend.

I found the cooler weather in NSW ATM (Central Coast) sufficient along with a chisel and rubber mallet.

The key was in the technique. After some trial and error I found that if you hold the chisel at 90 degrees to the floor and give it a sharp blow then large chunks would fly off fairly easily without damaging the metal. (mind you mine is 39 years old).

Trying to angle the chisel under the bitumen had less favourable results.

[cri_ag]

hmm liquid nitrogen aye, dangerous and fun. how do you keep it on the surfaces that arnt level? like the fire wall?

[MR22ZZ]

I used liquid Nitrogen,

Worked a treat, i think it was about 6 liters did a ae92 hatch completely and it probs only took half an hour.

Pro's:

BOC and most other stores have it,
Doesn't cost to much when you weight up how long it takes compared to CO2
About twice as cold as dry ice

Con's:

Will Freeze limbs (like solid frozen digits are cool anyways), must be very careful.
Have to hire an urn to transport it safely.
harder to apply in a sense, i had a stainless steel bucket that i would just tip about 500ml in at a time and tip that in over the sound deadener.


*protip: probably dont transport the urn with it in your front seat with a seat belt over it (i probably didn't think it through, much)

For anyone who is thinking of using this method I'll suggest using a small thermous to transfer the liquid N2 rather than an open bucket because you lose less through evaporation in the transfer process.

[MR22ZZ]

hmm liquid nitrogen aye, dangerous and fun. how do you keep it on the surfaces that arnt level? like the fire wall?

use it like water, pour it down as it snap freezes whatever it contacts.

it should be cold enough to 'shock' it away from the metal and should not take much force with a hammer to shatter it.

[Casey-G]

use it like water, pour it down as it snap freezes whatever it contacts.

it should be cold enough to 'shock' it away from the metal and should not take much force with a hammer to shatter it.

On the money!!! Just splash the shit on it'll snap freeze it, quick as, and no waiting around

[Teragon]

just as a point of argument is there anything lighter and better suited to sound deadening than whats already used, My SW20 could use with a bit of lightening but id like to not have my sound system shake the crap out of the car

yes i know the sound system is heavier than the tar but its kinda like moving fat from a bum and putting it in a bra

[Casey-G]

Cant really do one without compromising the other can you?

[parrot]

Anyone using liquid nitrogen wants their head read.

Dry ice is great, just give it time to work and it will come of in great sheets. No gouging your shell with chisels or whatever. I used two small 6 can eskies worth on mine, as I got it for free from work.

[MR22ZZ]

I use liquid nitrogen all the time for work.

It's fine to use as long as you know what you are doing, what the dangers are and you take precautions.

[Teragon]

and besides its good for overclocking,

wonder how good LN2 would be for a liquid to air intercooler lol, probably freeze the valves and break something

[MR22ZZ]

yeah, it would make all the seals hard and make them perish early, so you'd get leaks galore. That's why people don't tend to go any cooler than dry ice boxes around intake ducts.

[dazed_driver]

Definitely air chisel for the inside. Liquid nitrogen does work as well, especially for the gummy undercoating. Wire wheeling works for the underside... but it sucks. A lot. Trust me.

[ae86trueno]

Last weekend we started to strip down a newer 2005 model car about to turned into a rallycar, (not a toyota, think Korean) and dry ice worked for half of the tar in the car like it normally does, but the front section they use a new type of insulation material that it very fiberous, and the dry ice doesnt work. I had to use the air chissel, it worked but took a while.

Ben.