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1979-2004 V6 Mustangs General Discussions

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Unread 01-22-2010   #1 (permalink)
Str8Burg04 is offline Rookie

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Default popping after i turn off my car???

not really a big deal but am very curious. i will drive my car on a normal day and not push my car just drive it normal and when i get home i will turn off my car and get out and start walking towards my house and every time i hear popping comeing from my engine. i figure its just medal popping because of all the heat. just a natural thing that always happens. it has not affected my car at all. can someone please confirm that this noise is not a bad thing...or is it?just someone please let me know whats going on. its a 2004 v6 3.9L. thanks
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Unread 01-22-2010   #2 (permalink)
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You are correct!
It's OK. My 02' did, and my 09' does the same thing!
It's missing the driving and telling you to get back in and drive!
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Last edited by PencilPro; 01-22-2010 at 06:57 AM. Reason: add words
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Unread 01-22-2010   #3 (permalink)
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When the engine heats up the metal expands. When you shut the car down, the metal starts to cool, while cooling the metal will start to shrink causing it to ping and pop. It is a natural phenomenon that happens with everything. Ice cubes in water crack and pop, same effect. No harm.
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Unread 01-22-2010   #4 (permalink)
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Quote:
Originally Posted by shipwreck_98 View Post
When the engine heats up the metal expands. When you shut the car down, the metal starts to cool, while cooling the metal will start to shrink causing it to ping and pop. It is a natural phenomenon that happens with everything. Ice cubes in water crack and pop, same effect. No harm.
but he said that he can hear the poppin right when the car is turn off and gets out, idk if it would start cooling down that fast would it?
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Unread 01-22-2010   #5 (permalink)
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what you're hearing, is the A/C evaporator drain tube dripping onto the passenger side header.

that, and the cats cooling/contracting.
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Unread 01-22-2010   #6 (permalink)
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Quote:
Originally Posted by 232-K7 View Post
what you're hearing, is the A/C evaporator drain tube dripping onto the passenger side header.

that, and the cats cooling/contracting.
+1..... Everyone has that problem.....
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Unread 01-26-2010   #7 (permalink)
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lol ok. thats what i figured. i did some investigateing a couple days ago just because i was curious to see where the sould was actually comeing from and i figured out that the main popping was comeing from the start of the exhaust setup not really quite for sure what the name of that would be. but i'm thinking that my tiny stock exhaust is getting pretty hot and cant handle the heat or it can but i figure if i but on a true dual custom exhaust that it will quiet down a little after i turn off my car. splitting the heat down two different channels making it not as hot. how does that theory work out?
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