01 Lexus Gs 300, everything I need for a water pump change?

[BradF]

I bought a timing belt and a new water pump. What tools other than impact and sockets would I need? does it need a water pump socket? Also should I be changing anything thing else. Do i need to buy a new Timing Belt Tensioner or is the old one fine? serpentine belt and tensioner? Thanks for helping... relisting Items I have is helpful. thanks again.
my car has 300,000 miles..............

 

[PeteM]

You may want to check your owner's manual to find out when they recommend replacement of your tensioner.

If you don't have a manual go to the link below to download a free copy. Kind of handy to have a copy on your computer anyway.