A broken or debris-laden left- or right-front engine cooling fan, maybe?
Maybe you're only getting the car hot enough to fire up the fans after a long drive... when you pull up at a signal, the fans start up and you hear the noise and feel the vibrations...
The Bentley manual says the fans will come on if you switch on the air conditioning, so you could go start the Boxster, turn on the AC, and see if the racket resumes.
__________________
1999 Carrera 4 • Aero kit • 4" UD Pulley
My Corvette doesn't leak oil... it sweats horsepower.
Last edited by sd_boxster; 05-12-2009 at 07:54 PM.
|