This is a bit hard to describe so please bear with me. I just bought an 08 911 turbo with 12k miles. I notice vibration in the clutch pedal, sometimes, when I go to push the clutch in. From the clutch pedal resting freely, there is about an inch or so of travel or "free space" until you get to where the clutch actually engages. After I go through that little "free space" and get to where pushing the pedal is actually doing something, I noticed very short but rapid vibration almost like a buzzing. Once I push it a tad bit further in it goes away and everything is smooth, its just right on the edge of when the clutch is actually engaging. The vibration is always stronger when the car is running at higher RPMS. And sometimes I don't notice it at all but usually that is when I'm shifting at lower RPMS.
It doesn't really bug me too much but I'm just wondering if anyone knows whats going on. I called my dealer and the guy I spoke to wasn't sure but said it could possibly be something to do with the flywheel. Idk.
I'd say maybe the clutch springs. Or the clutch linkage cable!
I agree. Previous owner may not have had the best technique. You really should have it looked at by the dealer.
If the vibration you speak of occurs while you are engaging the clutch to take off from a stop it might be the flywheel.
What is reads like though is the clutch accumulator is going or gone. The clutch accum provides clutch boost or power assist when the engine is off and wehn the engine is running helps dampen the fluid pulsing that the power steering pump causes.
If you tell me the clutch is hard to depress first thing before you start the engine after the engine has been off say 24 hours, though when the accum goes bad the clutch is hard to depress after just a few hours, or even worst case when the engine is off.
Check for any fluid leaks from the clutch fluid reservoir. The clutch slave cylinder can sometimes go bad concurrent with the clutch accum. AFAIK the failure of the accum doesn't cause the failure of the slave cylinder nor vice versa they just fail about the same time.
The dealer service department can test for a bad accum easy enough.
If the accum proves to be ok then the service department will have to look deeper.
Sounds like the clutch bearing to me. Is there any noise associated with the vibration?