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Originally Posted by Padawan
I assume it's normal, because mine makes the same sort of noise for the first second or so after it starts up.
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My 2001 boxster with 100,000 mi rattles also, buyt not for 3 seconds. I timed it it last 37 seconds. It then disappears.
I do have another rattle in the catalytic converter that continues. I know its the converter because I put a stethoscope to it. When I was a kid, I had a 944 that had the same problem. Turned out to be an oxygen sensor cap in the catalytic converter. I hope this is the same thing.