ok i got the mechanic to check it this afternoon and it seems most of it has dissappeared... the mechanic said that holden use little grease pellets to lubricate the water pump and that when one goes through it takes a while to get through the system... although he did say a good coolant makes these unnecessary... apparently if it had been a gasket there would have been a lot more white stuff and it would have been all over the radiator cap
the mechanic isnt a holden mechanic he runs his own business if that makes the info any more reliable... i also know him reasonably well and he knows what hes talking about
thanks for all the info anyway
