Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

cold start rattle?

Old 23-Sep-2007, 05:28 PM
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cold start rattle?

Basically, the last two days, when i get out to work at 5:30 am, I noticed a 'cold rattle' coming from the engine. It lasts a couple of seconds. I shifted from 1st to 2nd, still hear it, then its gone.

I start the car mid-day,(any non cold weather) and the car is not making any noises it shouldnt.

Anyone know what the problem could be?
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Old 23-Sep-2007, 06:04 PM
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check for an exhaust rattle
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Old 24-Sep-2007, 01:29 PM
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could be cat heat shield.
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Old 25-Sep-2007, 05:55 PM
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ok now it happens regardless of the weather but only when i turn on the car. It goes away after a couple of seconds.

I don't know why it would only happen after turning on the car..the exhaust doesn't rattle.but i will have to check this with a buddy to reproduce the sound.
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Old 25-Sep-2007, 06:57 PM
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I can almost guarantee you its the exhaust.. is it like a metal on metal high pitch sound? Or more of a low rattle/knocking?
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Old 25-Sep-2007, 07:50 PM
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its more of a mettalic kind of sound..hard to describe with words...i think your right too. the pitch matches the revs...
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Old 25-Sep-2007, 08:38 PM
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yeah its a heatshield
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Old 25-Sep-2007, 09:28 PM
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so whats the next step bud :P
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Old 25-Sep-2007, 09:31 PM
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if its the heat shield...and its corroded where the bolts hold it up...take it off...you dont NEED it

worse case..by a new one if you really want it there
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