The water punp yes... but the thing is, we haven't touched it, we didnt take it off when we did the headgasket, we havent touched it and it wasn't making any noise before the head gaskett went! but why would it be making a noise and be lose on the wheel?

Coolant pully? You mean water pump?

Change it before tthe cambelt moves too much and you bent lots of valves.

Hi, I've recently replaced the head gasket on my x14xe and when it runs the coolant pulley is making a really awful noise, its really loose on the wheel, is there anyway of getting it to stay on there without it moving around?
Or would this noise be from a different pulley/sprocket?
any help would be much appreciated!
Also the car doesn't like to start (it hasn't been ran since late October) you've got to rev it to make it start when you turn the engine over otherwise is just dies!
Any suggestions or solutions would really help.

Thanks!