Time for a replacement?

The living room radiator seems to have a little issue. The floor underneath has a few rusty watermarks on the laminate.

Bought a replacement radiator today, the car decided to break down on the way home, so I limped back at 20mph. Looks like it's a repeat of an issue I had a couple of years ago with a poor connection onto the injectors. I searched Youtube for videos showing how to access them (where they were to be precise), and most showed them with everything stripped away which didn't help. I did eventually find one for a different range of cars that used the same engine, but then ran out of time, so that will have to carry on tomorrow.