[harryrcb]

Originally Posted by heiwaz

Hello, I hear a stranger noise in the engine of my 986 when accelerate, and when slow down, too. Here the direct link to the audio clip:

http://www6.online-convert.com/download-file/1f230baa90bb384b8fa354581ea43dcd/converted-14d5f37cb919cd.mp3

I tought it was the tensioner belt, but I checked belt, tensioner, water pump, ... and all is ok. What do you think this noise come from. It seem like an electric engine.

How did you check your tensioner and water pump? It sound like a brng noise and could be comming from anything that belt is attached to. I had a similar noise and turned out to be one of the idler pulley brngs. They are reallly hard to find unless you know what you are looking for. after removing the belt you turn each one by hand and you might feel just a slight difference from the other. You probably wont be able to hear it by hand turning unless you rig up your dremel with a rubber cylinder and spin each pulley as fast as you can.
hope this helped