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John from PA · 11-22-2020, 06:59 AM

My 2000 Boxster (non-S) 5-speed suddenly started making a constant frequency or constant pitch whistle. It has occurred twice, and in both instances the engine was fully warmed up, with the noise staring after about 20 miles of driving. In many instances of driving similar distances it does not occur. From the sound, and standing exterior to the car it is very likely to be coming from the engine compartment but from outside the vehicle it seems to be similar volume regardless of side.

It goes away with light throttle. As I said it is a constant pitch regardless of engine speed and occurs at idle.

Thoughts very much appreciated.

11-22-2020, 06:59 AM	#1
John from PA Registered User Join Date: Nov 2005 Location: Downingtown PA Posts: 8	Boxster engine whistle My 2000 Boxster (non-S) 5-speed suddenly started making a constant frequency or constant pitch whistle. It has occurred twice, and in both instances the engine was fully warmed up, with the noise staring after about 20 miles of driving. In many instances of driving similar distances it does not occur. From the sound, and standing exterior to the car it is very likely to be coming from the engine compartment but from outside the vehicle it seems to be similar volume regardless of side. It goes away with light throttle. As I said it is a constant pitch regardless of engine speed and occurs at idle. Thoughts very much appreciated.