pinging/rattling sound at 3100rpm

[boxster1]

yes, it's a 3.2

[blue2000s]

It's most likely to be the engine mount.

[clickman]

I would have said motor mount too, but for that it's described as pinging/rattling, when I thought motor mount created vibration. I've got the 2.7 and occasionally, not always, get the seat-of-the-pants vibration at around 3100-3200. I'm at 50k miles, so in theory I'm due for the motor mount.

[blue2000s]

Originally Posted by clickman

I would have said motor mount too, but for that it's described as pinging/rattling, when I thought motor mount created vibration. I've got the 2.7 and occasionally, not always, get the seat-of-the-pants vibration at around 3100-3200. I'm at 50k miles, so in theory I'm due for the motor mount.

Symptoms depend on how worn the mount is.

[boxster1]

I don't feel any vibration. I only hear the sound and it is fairly loud.

[Daniel R]

Could be a number of things. My 2000 S has exhaust resonance at the same rpm, but then I am running no cats and 2" pipe from the after-market headers to the muffler so it is to be expected.

The first thing I would look at is the exhaust. Maybe a part of it is touching the body of the car??

I would not think it is an engine mount, I replaced mine last week and am familiar with symptoms, but I could be wrong.

Good luck with your diagnostics.

[sd_boxster]

3000ish RPM is where our exhaust hits resonant frequency. If you have a loose heat shield or a catalytic converter that is starting to degrade, that's the RPM where you'll hear it rattling/pinging.

If you post up a sound clip, you might get some better guesses. Good luck!