Got home last night to find out my cossie is pissing water, after a bit of pooking around it looks as if its coming off the bit under the thermostat housing (it looks removeable and has a pulley on it). Can any one tell me what this part is, is it easy to fix and if its a garage job is there any quick fixes to enable me to drive it to the garage???

thanks in advance
Rich
(very disgruntled cossie owner)