Well, I received the official quotation from the dealership and it would seem that the prices of the pump has reduced because I was asked if the timing belt had been replaced recently and now that has been included in the quotation.
The the original estimate DID include the radiator replacement (but not the timing belt ect) so the total of the quote including radiator came in at $4653-00. The quote for the work with just the water pump and the timing belt, tensioner belt & 2 idler pullys is $2419- both incl GST
So not as frightening as first advised. (Bit like going to the Doctor and being given what could be the worst case first and scaring the stuffings out of you
)
With the radiator included quote there was an item called 'Adjuster Power Seat' part no 05159049AA Cost $905.90 plus GST ... have no idea what that is. No mention of the 'serpentine belt tensioner' and thats what you have to be prepared for.. as the job can grow.