I had some spray under the hood the top part has a leak where it meets the aluminum. I got a new Denso radiator and new upper and lower hoses too. Should I go ahead and do the thermostat too? I heard the oem ones are very reliable and I never had problems in the winer.

 

If not now, when will you replace it?

What are the chances of you having a better time than right now when you're replacing the rad and hoses?

Same goes for the rad cap too.

 

the same thing happened to my TSX about a year ago

There was a DIY thread here(I think) and I went ahead with the replacement. I had my dad help me out since the hoses were pretty tight. If you have all the right tools it should take no longer than 3 hours to do. I ordered the radiator from RockAuto and if I remember correctly it came with a new thermostat. Make sure you replace the radiator cap as well.