Hi there everyone. I have recentley had the pleasure of buying my first VR6 golf, shes a 92 J reg, 88.000 miles full vw s/h, 1 previous owner, and fell in love instantly. However a strange noise has suddenly appeared from my engine, its a kind of whiney noise and is coming from the left side with the belts on. it seems to be coming from the alloy unit thats above the pullys and belts. What is this part? and should i be worried? Thanks