rough noise from engine
 

can anyone help with a diagnosis? occasionally, as i am in 3 or 4 gear...as i let off the gas, there is a loud hum or growl from the engine compartment. it typically only happens when the rpm is about 3000. it will go away if i press on the gas or clutch again. but it is annoying. it only happens when i am driving and let off the gas. it sounds similar to driving on a very rough road.

thoughts?

Have a look at this:

Boxster 986 vibration @ 3000/3200 rpm (fix?) - 986 Series (Boxster, Boxster S) - RennTech.org Forums

thanks nimbus. sounds like others are having the same problem.

New flywheel fixed mine about 80K miles ago.

Mine does it when hot, it's annoying but at least you know it's what Porsche call 'normal'.