Wierd Vibration sometimes

[Citystars]

When I bought my car, it had some belt squeal after 4kRPM.

I was going on a cruise with local car club the day after I was changing my belts , I couldnt find a PS/Crank belt, so we just left it, cut the AC belt off because couldnt find one either (went to 5 places, no one had one) and then changed the alt/crank belt.

the squeal is gone, but now, there is an almost rubbing noise coming from my engine bay, i cant locate where exactly its coming from but its very anoying and I would like to find out what it is.

The thing is, its only seems to happen when I start my car when its cold outside , not cold enough to see your breathe but cooler, say at night time like 1 or 2 am.

Any ideas? It could be belt noise from the PS belt, or would it be possible its because there is no belt onto the AC?