When car is started, I hear a rotary-like sound, something similar to a helicopter in the distance coming from the right front wheel well. I can actually hear it from just about anyplace around the car, but it's most noticeable if I hold my ear up to the RF wheel-well.

This sound is not coming from the air pump and both motor mounts are fresh - don't have a fan blade making contact with the shroud.

I've put a long 3/8 ext. on various spots on the exhaust manifold and held my ear to the other end - nothing here either.

Car has the 12 valve M103 motor.

Thoughts appreciated.