My '98 Protege makes a high pitched whine for the first couple hundred yards when both the engine and outside temperature are cold (below freezing). It doesn't sound like a squealing belt. The sounds is an annoyingly high pitched metallic whine that increases in frequency (and volume) as the engine revs. I think it's one of pulleys (or bearings) on one of the accessories, water pump, or the A/C compressor, but I can't figure out which one when looking under the hood. I suppose it could also be one of the belt tensioners or idler pulleys. So, the question is this: how can I figure out which one is the culprit?