Removing Sound Deadening Material

[elbon50]

Want to remove the bitumen material from the floor & rear firewall

Have had a go with hammer & bolster chisel

Looks like a long slow process

Whats the best way to tackle that please ?

Peter

[kaiowas]

Wait until winter and do it on really cold morning.

[Lauren]

What Phil said. I did mine in winter. Needs to be freezing ideally, then you can just whack it with a hammer and it will just shatter. Might be an idea to wear goggles!

[elbon50]

Wait until winter and do it on really cold morning.

Ahhhh yes, it goes brittle & breaks off easier ?

Peter

[pk_090]

did ours in the snow last year just smacked it with a hammer and then vacuum cleanered'd it up.

Ive always wanted to try doing it with a CO2 fire extinguisher i know they are cold but i cant get my hands on one.

You can also buy "freeze spray" peter comes in can format and does exactly what it says on the tin. Mainly used in the composites world when using pre-preg as it has to be stored in a freezer and starts to cure when out so the freeze spray can buy you a couple more mins.

http://www.ebay.co.uk/itm/Rothenberger- ... 1474wt_982

[elbon50]

I have a can of freeze spray

Will have a try with it

Peter

[tonigmr2]

I was told pipe freeze spray, but tbh even on days of normal temperature I didn't have that much trouble, it was just hitting it right.

[cartledge_uk]

As toni says, any day is fairly easy. You can also go the other way and use a heat gun and you can scrape it off like sunpat. I just hammer and chisel

[jon_st205]

Did mine with liquid nitrogen

[MartG]

I did my first one using the 'cold day, hammer & chisel' method, and the second with the 'heat gun & scraper' method - the second was much easier and quicker, as well as being nice and warm

[pk_090]

Did mine with liquid nitrogen

any left?

[elbon50]

Tried the pipe freeze method

Works fine but looks like I would need quite a few cans of freezer

Can only do a small area at a time

Peter

[cogboy]

I'd recommend finding an engineering graduate with a degree, but no job, and leaving him inside the car for a couple of days with a heat gun, a spatula, and a crate of beer.

-From experience.

[pk_090]

I d recomend freezing over heating of the sound deadening every time. First time we did it on a cyborg 10 of us using blow torches and gasket scrapers didn't end well took us ages to do, very messy and some of the fumes that came off made us all sick the next day!. Since then every other car we have done we have frozen and chipped it off then hoovered it up with a vacuum cleaner afterwards. CO2 fire extinguishers, liquid nitrogen or dry ice (solid CO2) all work well if you can get hold of it, freeze spray although little cans and takes a few works well. Failing that wait for the snow this year that is when we did the 2 BMW's!
Alex

[elbon50]

I d recomend freezing over heating of the sound deadening every time. First time we did it on a cyborg 10 of us using blow torches and gasket scrapers didn't end well took us ages to do, very messy and some of the fumes that came off made us all sick the next day!. Since then every other car we have done we have frozen and chipped it off then hoovered it up with a vacuum cleaner afterwards. CO2 fire extinguishers, liquid nitrogen or dry ice (solid CO2) all work well if you can get hold of it, freeze spray although little cans and takes a few works well. Failing that wait for the snow this year that is when we did the 2 BMW's!
Alex

I agree Alex. Have done a bit with a heat gun & also tried a freeze can. Much prefer the freeze method but a little can doesn't go far

So will wait for the cold weather now I think

Have heard that another long cold Winter is forecast. So if that's the case there should be plenty of opportunity

Peter

[pk_090]

i think im going to wait and do mine then. Is it just on the bulkhead behing the seats where theres sound deadening?

[elbon50]

i think im going to wait and do mine then. Is it just on the bulkhead behing the seats where theres sound deadening?

No it's all across the floor as well and up the sides of the central tunnel Alex

Quite a bit of weight altogether I think

Peter

[Lauren]

It's not a huge amount of weight Peter. Think I weighed mine at 8kg.

If you look at that comparitive to the weight of the car it's less than 1%.

[Jim-SR]

I found it closer to 15kg, and that ~1.5% weight saving is significant enough when its costing you £0 and just a days worth of effort. You can't get a return like that anywhere else without spending significant money.

[elbon50]

It's not a huge amount of weight Peter. Think I weighed mine at 8kg.

If you look at that comparitive to the weight of the car it's less than 1%.

Very true Lauren but it helps to chip away at the total weight

Will take out the weights under the seats & look for lightweight seats

Bumper bars (front one is already out - rotten)

Stiffening from under bonnet, rear bootlid & engine cover

Errmm ...running out of ideas already

Peter