My 2000 4Runner 4cyl 2.7L just passed the 90k mile mark. The service manual only says flush coolant and change the oil. However, since reading up on the pink milkshakes, I figure now's a good time to swap out the radiator. Most people seem to suggest the Koyos. Is there anything else that I "should" do while I'm at it? I was going to do the timing belt and water pump, until I realized that I have a timing chain.