Radiator pressure test

Hey all, long time lurker here! I have an 08 Tundra with the 5.7L engine, 131k. As I was moving it to work on the rearend(right rear hub and bearing) I noticed antifreeze on the ground, small puddle about 8” diameter. I thought it was probably the water pump weeping but when I inspected, there was coolant everywhere, dripping down the radiator and bottom of the engine. So now I’m thinking it might be radiator. I drained the radiator, probably 2gal and then filled it up with water and did a pressure test, put 15psi at the rad cap. No leaks or drips are showing up after an hour. Would I be safe to rule out the radiator and all hoses to the engine? While it was under pressure I looked around more and did see dried coolant under the water pump. Guessing a gasket or oring rotted and was spraying coolant. Going to plan on timing belt, water pump and serpentine replacements and wanted a 2nd opinion. I don’t think anything was ever replaced as far as timing belt etc. Any help or suggestions would be appreciated, thanks!

 

If it didn't leak via a pressure test, then the obvious answer would be, the radiator cap. If it's your water pump look at the bottom of the engine block, right by the oil filter and if it's caked with coolant residue, then it might just be the water pump.