you definitely can replace the radiator. i bought a denso one from rockauto.com and saved me a ton. i bought a toyota coolant too. very easy to replace on your own. i replaced mine a few months ago due to leaking radiator(bottom). now, it's as good as new. i'm now at 105000 miles.
Leaking radiator, $770 to fix it. I've declined and will replace on my own. Anyone recommend OEM or after market radiator over the other? I will replace upper and lower hoses as well, any other weird things I should know replacing it on my own? Fluid preferences?
Thanks!!