overheating

[stick]

been getting a constant whirring noise from engine (1900 water cooled) whilst driving for a couple of weeks . yesterday though temperature went right up and water was bubbling after only a mile drive. any ideas what might be? water pump possible?
cheers

[jed the spread]

id say the waterpump for sure.that noise is it comeing from the waterpump and if you put your hand on it while the engine is running can you feel a kind of grinding feel?
thats what mine felt like when mine went.also is there any water dripping and makeing a small puddle under the van

jed