oil cooler problem

[67hat34c]

Crusader model 350, 454 oil cooler. found one leaking around the seam where top casting meets the tube. Question is how are these assembled? are they silver soldered together? or is the pipe threaded. new cooler is 280.00, I hope there is a way to save the one I have instead of a new one.

 

[Boatsb]

If its the one I remember its soldered. A radiator shop can help or do it your self. best to completely remove the end and clean up before resoldering?