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Why Does the Carrera S "Rattle" When Starting Cold?

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Old 05-06-2008, 04:29 PM
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Why Does the Carrera S "Rattle" When Starting Cold?

I've noticed when I start my car & the engine is cold from sitting overnight, it gives sort of a "rattle" sound when it first starts up. I've even noticed a similar sound when I leave a light and may be lugging it a little, or in second gear just crawling around a corner such as I'd di in a residential neighborhood. The sound is not always there, but it does always seem to be there when the engine is cold.

I seem to recall the dealer salesperson telling me that the "S" model does that when it first starts up.

Any comments from those of you that know a lot more than I do would be appreciated.
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Old 05-06-2008, 07:13 PM
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I wondered the same thing. I almost sounds as if a portion of the exhaust system is loose. It goes away after a few minutes and I've never noticed it outside of first starting it up.
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Old 05-06-2008, 07:44 PM
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My 05 C2S cab did the same at startup. At times I thought it sounded as if it had PSE when first starting. I kind of liked it. My 07 Targa doesn't seem to do it, or at least not as much.
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Old 05-06-2008, 08:27 PM
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Mine does the same - the noise goes away after a few minutes, I just don't worry about it, just part of the car's personality.
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Old 05-07-2008, 12:14 AM
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I believe it is due to an emissions device...perhaps an airpump which could cause the rattling/burbling sound.
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Old 05-07-2008, 07:04 AM
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It's just warning everyone to get out of our way.
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Old 05-07-2008, 07:10 AM
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It's just warning everyone to get out of our way.
hahhaaha.

except one person asked me what's wrong with your engine?
lol.
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Old 05-07-2008, 09:03 AM
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Mine sounds like a giant popcorn maker from a cold start.
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Old 05-07-2008, 10:02 AM
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Mine sounds like a giant popcorn maker from a cold start.
mines too
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Old 05-07-2008, 03:04 PM
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All the 3.8's do it MOST noticably. It's part of emissions; but no worries. She has her own sound.


I love seeing peoples reaction to it when it starts up. Especially the stuffy-up nosed- types. (aka Lexus owners)(snooore!!)
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Old 05-07-2008, 05:30 PM
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Just switched to aftermarket mufflers (Remus) - no more rattle on start up.
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Old 05-07-2008, 05:33 PM
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Rattle

I took mine to the dealer twice with the same issue. He said it is normal and I forget exactly the reason but it sounded iffy at best. They told me it was just the "throaty sound of the car"
I then read an article in the PCA mag that a guy wrote on all the little issues he had with his 997 S. The rattle on start up was one of them. He too took it to the dealer 3 times and finally he had them listen to the driver side muffler at start up. It goes away after a minute or two. They replaced the muffler and the sound went away. They said some baffles in the muffler were loose.
I wonder if its a flaw in the muffler some how?
I plan to go back with a copy of the article and see if I can get it resolved......but sounds like it will be a lot of effort to get them to deal with it.
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Old 05-07-2008, 05:48 PM
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My Boxster S does the same thing.
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Old 05-07-2008, 08:20 PM
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Same thing with my TT plus an added bonuses of a puff of black smoke from the turbos...hehehe :-)
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Old 05-08-2008, 02:56 PM
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My 3.8 (with PSE) didn't used to do this, but it started a few weeks ago. It definitely sounds like a loose piece in the exhaust. Goes away once the car has warmed up, but it sure sounds cheap and broken until then.
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Old 05-08-2008, 02:56 PM
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06, 38, 997, boxster, carrera, cayman, cold, engine, exhaust, porsche, rattle, rattling, sound, start, starting, starts


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