Metal Rattling Noise at Start-up

lradec

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#1
Has anyone experienced or heard a brief but LOUD metal rattling noise at engine start (like two small metal plates rattling against each other)? The service department at my Infiniti dealer stated that he has located a service investigation ticket within Infiniti about "intermittent" metal rattling noise at startup. Trouble is, it is not intermittent in my car - it happens EVERY time but is much louder with a cold start. It drives me bananas that a $45K car makes this rattling noise. It is a brief noise that stops quickly, and does not continue as the engine runs. I have been assured that this is not a mechanical problem and does not affect the integrity and safety when operating of the car. But I have had people ask me if my brand new car is okay when they hear it start? It's embarrassing! Anyone have the same experience?
 
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#2
We have only had the car for 3 weeks and drove it a couple times, but my son (who has decided its his new car) has mentioned he hears something that sounds like a heat shield rattling at start up. Once it warms up and dries up a little, I can pull out the creeper and look around, but only if the car is around ;-)
 

ArmadaMike

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#3
I thought it was just me too that had the rattling noise. It does sound like the heat shield.
 
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