Anyone have any idea what this squeaking sound is after reving the engine.

i cant tell where its coming from obvious thing to me would be the belts but they are all tensioned fine. Happens while driving as well and only when the engine is coming down in rpm never when accelerating.

 

That’s you BOV

 

thanks mate, that was it. Not sure why it was making that noise, but i guess thats what happens when you buy cheap ebay stuff.