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  #1  
Old 11-19-2006, 10:28 AM
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W123 - drying out water from sound-deadening boards

hey guys,

i got some water in my 123 - ive read through the archives and have a couple q's:

1.) does anyone know where to get chemical dehumidifier? (my local hardware store was clueless, home despot said theyd never heard of it...)

2.) is there any way to remove the sound deadening boards so i can completely dryout the space in between the boards and floorpan?

boo to trying to dry out water when its 47 degrees out...this would be much easier if it were warmer...

thanks,
dd

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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
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  #2  
Old 11-19-2006, 02:05 PM
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Quote:
Originally Posted by dieseldan44 View Post
1.) does anyone know where to get chemical dehumidifier? (my local hardware store was clueless, home despot said theyd never heard of it...)
Ask for silica gel or desiccant.
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  #3  
Old 11-19-2006, 02:24 PM
Larry Delor's Avatar
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I've seen little blue buckets in grocery stores for a dryer/dessicant type of product (for under kitchen/bathroom sink/etc).
Or if you want to order from the internet, there is this site: http://www.drytheair.com/xcart/store/catalog/category_255_DRIERITE_Dessicant_page_1.html
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  #4  
Old 11-19-2006, 06:12 PM
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I wouldn't remove the deadener.

on my TD it is mostly removed, and it is VERY hard to get it out and back in in one piece. maybe poke a small hole in it and use a shop vac to suck out as much moisture as you can. the stuff is like road tar coated with cement. I had none in the rear of the car, so I put in some Home Depot carpet padding. not bad. I gotta get all the cracked and flaking stuff out from the front of the car and replace it with the padding. maybe put some dynamat in... pricey!
John
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  #5  
Old 11-19-2006, 09:45 PM
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thanks...ill grab some dessicant tomorrow

i left the car open all day today with fans on circulating air. seemed to work ok. deadener is still wet. hopefully the dessicant will draw it out.

looks like i am going to need to work on the front and read window seals. sweeeet.

dd
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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
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'83 300TD Cali Wagon 210k, wife's car
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  #6  
Old 11-19-2006, 10:35 PM
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A hair dryer can often be helpful in cases like this where ambient temps are so low that evaporation is not being helped. Of course the heated air can't really get directly to the trapped moisture, but heating up the floor should help some.
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  #7  
Old 11-21-2006, 12:04 AM
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update - WalMart fan to the rescue

for those with the wet soundboard blues: i went to WalMart and got a $10 holmes mini fan with heater. worked really, really well in one night (its now in the 20's at night). just put it on the affected areas, cracked the sunroof and waited. fogged up the windows, a good sign that moisture is evaporating and escaping.

now i have to seal the leaks (i think its the windshield...)

dd
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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car
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  #8  
Old 11-21-2006, 12:23 AM
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If your AC works, use it.
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  #9  
Old 11-21-2006, 12:28 AM
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Quote:
Originally Posted by dieseldan44 View Post
hey guys,

i got some water in my 123 - ive read through the archives and have a couple q's:

1.) does anyone know where to get chemical dehumidifier? (my local hardware store was clueless, home despot said theyd never heard of it...)

2.) is there any way to remove the sound deadening boards so i can completely dryout the space in between the boards and floorpan?

boo to trying to dry out water when its 47 degrees out...this would be much easier if it were warmer...

thanks,
dd
doesnt the a/c work as a dehumidifier also.as it will make defrosting more effective with it on.might work to pull some miosture from the interior.just dont set to frosty.BTW do you mean the padding between carpet and body ...or the very thin sheet stuff that is stuck to all floor surfaces?I ask only because when i patched my floor I had to pull some of that up...and while carpet and associated bits were wet,that thin sheet of stuff was still not even damp inside.I hung carpets in basement near furnace until dry.
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  #10  
Old 11-21-2006, 05:55 AM
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No Dessicant..???

G'mornin',
I'm certain that Lowe's, ACE, Home Depot, and 84 Lumber all carry a dessicant product.....I think it's generally in the Paint Dept. but may be in the Closet Dept.......

SB
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  #11  
Old 11-21-2006, 09:36 AM
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ill check again at home depot...

Quote:
If your AC works, use it.
A/C is a no go as of right now...so thats not an option that's *sooo* far down on the repair list. But it was updated to R134 in 5/2005 (with a new compressor) so it can't be too far gone...

Quote:
BTW do you mean the padding between carpet and body ...or the very thin sheet stuff that is stuck to all floor surfaces?
It's the stuff between the carpet and the body that doesn't come out easily. Water seems to have seeped under it, when I push on the stuff I can see moisture flow out from underneath it near the rubber grommets etc.

I'll go in person to home despot and look for the elusive dessicant.

dd
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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car
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  #12  
Old 11-21-2006, 11:16 AM
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Please don't get upset...

but i always thought that sound deadening insulation on the floorboards is what greatly enhances the rusting out of 300D floorboards! It really traps water and holds it there. Those floors are galvanized and shouldnt rust that easily.

I've restored my 300D and welded in new floorboards, but instead of installing insulation, I just put an extra removable piece of heavy Mercedes Carpet under there in the rear.

Not all 300D's rust, but when they do, its usually the rear floorboards that go first.
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  #13  
Old 11-21-2006, 11:26 AM
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makes sense...

Quote:
but i always thought that sound deadening insulation on the floorboards is what greatly enhances the rusting out of 300D floorboards! It really traps water and holds it there.
that certainly seems to be the case. the sound dampening material has already been removed from the rear (didnt know until now that it was meant to be there). luckily, my texas car doesnt have any rust on the floorboards, and id love to keep it that way.

dd
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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car
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  #14  
Old 11-21-2006, 11:36 AM
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Set up a basement dehumidifier in the car for a week. Set the thing all the way to "dry as toast". I did this with an old station wagon that had been left open during a really good thunderstorm. The dehumidifier took care of what the shopvac left behind.
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  #15  
Old 11-21-2006, 10:33 PM
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I had a water leak in my '84 300D on the front drivers side. I dried it out best I could, used dehumidifier, etc. Leak was fixed, three months later when I pushed on the sound deadener water squeezed out. I ended up using a heatgun and a plastic scraper to remove all the factory sound deadener. I then replaced the factory deadener with Dynamat. The factory deadener is some sort of asphalt material that has a layer of foam between it and the metal floor. Consequently the foam absorbs water and is difficult to remove. The Dynamat adheres directly to the metal so no water will get under it if the leak reoccurs. RT

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