What's up with that sound that cars make after they have been shut off?

[Subject]
What's up with that sound that cars make after they have been shut off?
[Question]
You know how after you drive a car, park it, then shut it off, it makes that small clinging sound? What is that sound, and what's making it?
Uh, the sound is coming from under the hood. Drive your car around a few miles, then shut it off. Go towards the hood, and you'll hear this clinging sound. That's what I'm talking about.

bmw_illusionist @ 2009-08-28 16:50:59

[All Answers]
Sounds like 'run on'. The engine tries to keep running for a second after you shut it off. A higher octane gasoline might stop this.

mos_19g30 @ 2009-08-28 16:56:58

What you appear to be describing is the sound made by cooling metallic parts. As the metal begins to cool, it contracts slightly resulting in the pinging sounds.







It mostly comes from the engine and exhaust system and will be louder or softer in different vehicles depending on how these "hotter" parts are connected to the rest of the vehicle and how well these parts conduct the sound.

ca.alert @ 2009-08-28 16:57:23

What you appear to be describing is the sound made by cooling metallic parts. As the metal begins to cool, it contracts slightly resulting in the pinging sounds. It mostly comes from the engine and exhaust system and will be louder or softer in different vehicles depending on how these "hotter" parts are connected to the rest of the vehicle and how well these parts conduct the sound.

PimpMyRide @ 2009-08-28 17:04:51

Could be oil dripping from heads to pan, contracting of metal parts while cooling. If the car "continues to run" it is a timing problem.

Your question, is vague at best...

SOUTHERN GENTLEMEN @ 2009-08-28 17:05:43

As everyone says, it is the engine and everything else metal under the hood cooling down. Generally an exhaust component tho. Any kind of engine makes that sound, some just aren't as noticeable as others.

eight_kinds_of_hell_454 @ 2009-08-28 17:26:25

[Subject]
where is a good place to buy car audio?
[Question]
i have a 1995 toyota camry with an aftermarket stereo deck, and stock speakers. i want to know what the best choice would be as far as Subwoofer go. i don't need a quarter million watts or anything, maybe 250-300 or so. but what should i look for? do i really need two subs or just one? what about active bazooka bass tubes? are they worth the money?

i also looked into custom toyota camry boxes for a 1995 but i dont know where to look. what would be a simple way to go about finding a cheap subwoofer and all that?

Jordan @ 2009-08-28 17:24:55

[All Answers]
NEWEGG.COM

Don @ 2009-08-28 17:28:46

1. Finding a custom box for a 95 camry will be pretty hard, if you can find one at all.



2. Stay away from powered bazooka tubes, you can do better.



Believe it or not, ebay is a good place to buy car audio, I have been doing it for a decade. There are also sites like sonicelectronix.com that are good, and they sell on ebay too.



You can get a good amp, like the kicker zx400.1 for a good deal, like 120 bucks. Thats a sub amp.



One or two subs, either way. I prefer one sub for simplicity. There are some single subs that can out-do three lesser subs!



First ask yourself, what are your goals? To shake the pavement and go deaf? Or just add some bass fill for your stereo to make it balanced and "musical"? I have a single 10 inch sub and 500 watt amp, and its plenty for loud, deep bass for me.

odinsragess @ 2009-08-28 17:32:11

Look on crutchfield.com for a custom box. They have a very helful hotline as well.

random.hero1015 @ 2009-08-28 17:37:34

millionbuy.com

Logan @ 2009-08-28 17:43:04

http://stores.shop.ebay.com/Sonic-Electronix-Store__W0QQ_armrsZ1

nick @ 2009-08-28 18:03:41

[Subject]
can you plug a sub-woofer without a amp?
[Question]
Really serious lol Is the?re a way
ok the one and only although you got 2 thumbs down....makes no sense why...your the best answer.....and yeah your right, i tested it out on a home stereo...sucks but it picks up bass...barely... just hope you dont get a short somewhere or bye bye sub...

tenkuunoshadow @ 2009-08-28 12:36:15

[All Answers]
when you run a sub off an amp, all your doing is getting the bass primarily. if your wanting to use it as a speaker, bridge your stock speaker wire so you still have your back speakers, and run speaker wire back to your box and hook up the wires. turn up your bass and you'll see. i did this with my old geo i had before i went and got my subs and amp.

The Only One @ 2009-08-28 13:09:09

ya, won't be worth it just buy a amp.

nick @ 2009-08-28 13:22:12

yes you can run a sub off of a stereo without an amp. the only problem is,

1. there will be almost no bass

2.you risk shorting something in your stereo itself.

sparky6212 @ 2009-08-28 16:19:29

No not really, you can but alot of the energy will be wasted on trying to make the sub woofer re-create the higher frequencies. Not much bass will be produced.



first you would need a LowPass Filter, which only allows the lower frequencies pass through to the sub. This will give you a nice clean lower sound.

A sub isn't designed to reproduce higher frequencies, as it doesn't have enough speed to produce them, a sub is more sluggish in movement, prefect for producing the lower end.



Plus the watts produced by your home stereo, may not reach the potential of what your sub can produce.



It shouldn't do any damage to the sub, only way you can damage your sub is if your feed your sub a clipped signal.

Aaron @ 2009-08-28 17:05:35

[Subject]
can I use a cb radio to listen to aircraft?
[Question]
can I pick up civillian and airline transmissionsfrom planes that fly over my house?

Alessandro @ 2009-08-28 13:36:09

[All Answers]
no wrong band with you can listen with a old scanner

jim w @ 2009-08-28 13:40:50

No. You need a scanner with the right frequencies. Unless you are on a take-off or landing route to or from a major airport, you won't pick up much.



Your best bet is Sporty's Pilot Shop at the Cincinnati airport. I'm sure they have a website.

MichaelS @ 2009-08-28 13:41:42

No, the frequency range is way different. A CB is only supposed or designed to operate on 11 meters, (27mhz).

bojo8127 @ 2009-08-28 13:42:22

I've been around aviation most of my life. I can recall 2 CB radios in General Aviation aircraft. Both were DEA planes. Many aircraft radios can reach the CB frequencies but those frequencies are very seldom used. I have set on the tarmac with engines running listening to a local AM radio station. It was just a matter of tuning in the frequency. Transmitting would have been illegal and I like leaving rooms when ever I decide to; not when those steel doors swing open.



Your best bet, as others have said, is an scanner with the correct frequency bands available or a dedicated radio. The scanner is far less expensive and much more efficient if all you need or want to do is listen.

gimpalomg @ 2009-08-28 14:15:13

[Subject]
would anyone be able to help me contact JLS please?x?
[Question]
i want to contact the JLS for my birthday. please PLEASE please try and help me if possible :)

princess--ox @ 2009-08-28 11:08:18

[All Answers]
i cant be of much help because i dont know the link to the website but i can tell you that i have found a website for them which you are able to book them for events you might have if they're available and you have to suggest payment. wish i knew the link for you, hope you find it though.

Blake @ 2009-08-28 11:12:35

what the hell is JLS?

Miss Lady Luck @ 2009-08-28 11:12:53

What car audio question are you actually asking please?

Timbo is here @ 2009-08-28 12:01:30