How do you change water pump on subaru wrx sti?
You should change the water pump when changing the timing belt for convenience. Subaru recommended timing belt change interval at 105k miles. Here a link for DIY: http://www.iwsti.com/forums/how-install/154977-04-sti-timing-belt-change.html I wouldn’t recommend DIY for noob since the work is quite extensive. I just let it to the pro for my timing belt change, although I didn’t change my water pump at the time for the lack of money.
