Today, i noticed hissing under the bonnet after dropping the wife off, flipped up the bonnet and noticed steam coming from a hose, i tightened the hose and it stopped, however... Quite a bit of water was under the car, it was dripping from the cam belt area. Is this a knacked water pump? If it is? How much do these generally cost to get fixed at a vauxhall dealership say with a new cam belt also, also, how long do they take to replace? Cheers for any help.