Is the Tundra plastic and metal core? If so I would replace it. I just am going through this with my T100. I reinstalled the old radiator, which was a Koyorad aftermarket already, and lo and behold the upper tank now has a crack in it, right on top. Maybe my handling did it but I never dropped it. Dang, so I got a new one arriving any day now. I picked the Denso because at least I have heard of the name and it is known for good products. Extremely friendly to replace a radiator on this. I used a 1/4 extension through the grill to put in the two bolts that hold the whole thing in place. Now I get to do it again, andit always results in blood due to scraping something sharp in the grill gap area. I suppose it is easy to take the grill off but with the luck as it is going I would break a grill pin.
Hoses I also wanted, and bought Gates, but they don’t fit. Correct in the Gates catalog. Not even close to the right bends. Going to have to get them at the dealer while they still have them, no one is making them anymore, the molded ones. Now I have two hoses that can’t be returned as it has been like a year and a half ago from Rock auto.