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996T - Intermittent hum from front end

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Got out of car to take some pics, and as I generally do, I let it idle.

It was then that I noted a humming noise from the front, I did not investigate fully but it was audible on the drivers side, in the front wheel area.

The sound is a hum like thing but I noticed it because it was intermittent, i.e. it had a frequency that was similar to a ringing tone... what you hear when you are on the phone calling someone waiting for them to pick up... hummmmmmmmmm, (pause...) hummmmmmmmm, (pause...) etc etc.

Is this normal and something that I never happened to have noticed before?

Since I then got quite sensitive to this sound I think I also heard it while actually in the car and driving and convinced myself that I could also feel it through the wheel.

Any ideas? Only just got back from holiday drive so have not looked into it at all, grateful for any early pointers however.

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  • 1 year later...

I hate responding to these old messages, but, I am experiencing the very same thing.  The humming seems to be coming from the front right side.  I place it somewhere around the Charcoal Canister.


Mine started just recently (MY 2000 986 S) after I added some oil to the crankcase,  I had been low on oil, and unfortunately, overfilled it slightly.  As soon as I did that, I got a small drip from the engine on the right side, and it drips right onto the exhaust and is quite annoying.  I don't know if they are related, and I have not finished tracking down exactly what is leaking.


But, strangely, that humming sound from the charcoal canister area started right after this, within a day or so.


Any ideas, anyone?


Thanks,  Brian

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