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Old 02-18-2001, 09:39 PM   #1
kaos200
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Question Weird Fuzz under hood...

Hello,
I can pretty much figure out it is for heat protection... but my BOV(I think that's what did it?) messed up all the fuzz!
anybody take that off(as I did!) I need to know any side effects (paint wise ?) or anything else to replace it with?
Thanks...
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Old 02-18-2001, 09:42 PM   #2
El Kabong
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It's not for heat protection, it's to put out an engine fire. At least that's what I was told. The little mounts would melt, that sheet of fuzz would drop onto the engine smothering the fire. Sounds reasonable in theory...
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Old 02-18-2001, 09:45 PM   #3
markus
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I think it also acts as sound deadening material.
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Old 02-19-2001, 12:38 AM   #4
kaos200
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anymore replies..?
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Old 02-19-2001, 11:14 AM   #5
nikkicalves
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I is in case of fire.

Nick.
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Old 02-19-2001, 11:25 AM   #6
markus
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Question

Not sue how effective it would be smothering fires since the air supply can just come from under the car?
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Old 02-19-2001, 11:36 AM   #7
SilverSuby
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Who better than a fireman to answer this question.

It indeed could be to put out the fire, or at least slow it down a lot. It's probably some type of chemical that "steals" the oxygen from the fire, or maybe it's just designed to "smother" the fire. IF the fire is in your engine compartment, something must be burning. Fire cannot exist suspended in mid air[unless it's a gas], so it must be on top of some physical object.

Many things in the fire prevention industry are weird. For example, we have a device which is a special flare. You light it and put it in a fire place and it releases chemicals which will put out a chimney fire safely. If we were to use water on the chimney, we could very easily crack many of the bricks, as they WERE very hot, and are cooled off quickly.
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Old 02-19-2001, 01:07 PM   #8
kaos200
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hey 8,
any paint problems so far?
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Old 02-19-2001, 01:08 PM   #9
98mpreziveRS
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interesting... but if this is indeed for fireprotection.. what would prevent the mat from just melting to the top of the hood if it were a hot enough fire *shrug*

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Old 02-19-2001, 01:19 PM   #10
JayP
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The '97 Audi A4 1.8T's didn't have the sound deadening material. All I can suppose was either it was not included to let the heat radiate and allow the engine to run cooler, or it was a cost reducing matter... which is my theory.

The V6 engined and '98+ cars (including all the turbo Passats) have the material.
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Old 02-20-2001, 12:10 AM   #11
SlideWRX
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Be carefull with the fuzz under the hood, it is commonly fiberglass based. be sure to wash your hands if you screw around with it alot. I know one of the main reasons for it is sound absorption, as I tested several working for an automotive supplier. Cars have to pass a Government pass-by sound test, under full throttle (don't remember which gear). If they are close to the req, but not meeting it, they will use tricks like that material to absorb sound to lower that pass-by level. they will also put it in if they feel too much noise is getting inside the car and will annoy the consumer.

If you're wondering how it works, the mechanics take a while to explain, but for example, compare a raquet ball court (very loud, lot of echo, flat hard walls) to a library (quiet, no echo, lots of soft materials like cloth and leather bound books, carpet, usually those textured ceiling tile). Cloth type materials absorb sound fairly well.
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Old 02-20-2001, 12:26 AM   #12
Subie Gal
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Lightbulb

i'd leave it where it is if at all possible.
it's there for a reason...

j.
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Old 02-20-2001, 12:35 AM   #13
8Complex

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Heh, had a few dings taken out of my hood ages ago and broke all the clips. I haven't put it back in yet. Guess that is why I'm planning on a fire extinguisher. *shrug*
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