Greetings, I've recently changed the head gasket and all timing parts on my X14XE Astra G but now I've got 2 problems. One of them is a squealing sound which is apparently coming from the crankshaft pulley, the one that looks like this: I though the squealing was coming from the timing belt...

Hi, new to the forum but a long time reader. My Astra engine has started to make a squeaky/squealing noise. It appears to by coming from the belt/alternator region. The alternator is only 6 months old. I've tried a little WD40 on the ribbed side of the belt and some Molyslip through the engine...