Spider on the road
again after winter
Join Date: Jan 2013
If it is related to the AC compressor, the noise should disappear if you switch the AC off.
The compressor is located at the front of the engine.
If the noise is coming from the left/backside (seen when standing in front of the car) of the camcover it could be the valve variator that makes the noise.
If so then I would recommend to change the variator next you have to change cambelt.