i dont know if yours will be the same as mine but after changing my water pump ..thermostat ect .i found a bleed nipple at the right hand side of my heater box (under the bonnet) it looks like a tube that a pipe would slide onto but it is capped off at the end with a screw in cap..run the car till it is hot ..unscrew the end cap slowley untill the hissing stops and water flows..if theres no hissing the car isnt hot enough. let it run longer. this is hard to spot as it dosent look like a screw..its kind of like the top you get on a cigar tube ? this fixed mine in seconds (after spending over £!00 ) doh!! good luck.
jimmy jimmy5225@hotmail.com, April 2007