Haven't been able to get hold of a new crankshaft pulley but took the old one off this morning and rebonded the rubber vibration dampening strip to the pulley inner part. Runs quiet now with no hint of a squeal. Think there must be a few Starlets running around with the same fault - the squeal is annoying, but it didn't look like it was going to fail any time soon Knocking noise could be related - bit of a long shot, but the pulley runs very close to the timing belt cover, maybe it could become loose enough to rattle against it? Cheers