Changing radiator 93 240sx KA24DE

[squonk]

My radiator just crapped out and is leaking fluid everywhere. I tried to use some epoxy on the cap but it still leaks pretty bad. Mechanic told me to replace it...

I'm not a mechanic but I am able to do a few things with help. I'm wondering if I can tackle this issue myself. So I'm looking for what to do.

I noticed the Koyo radiator online that fits into my price gap but maybe there are other people here who have preferences over certain radiators with this model of vehicle. My vehicle isn't turbo.

I was also reading that I must have the radiator flushed before installation. What does that mean, how do I do this?

Please help I would really appreciate it.

Do I need any type of special tools? Will I have to take the intercooler I have on off?