I own a 2007 Fiat Panda 1.1 Active. It's currently done 49,000 miles and I've just had the serpentine belt replaced as the old one was making a chirping sound. However I've noticed that since the new one has been fitted, there is still a chirping sound that is coming from the alternator belt area. Up until now it's been a very reliable car to drive. I'm wondering whether it might not have been tensioned correctly or if there is an issue with one of the pulleys? It's a very simple system as there's only two pulleys the belt rotates on, the alternator one and the crankshaft one (I think). Both pulleys look ok, but I'm not a car expert so I just wanted some general advice.

Many thanks