Turns out there were 6 leaks.

Both corners where the tubes join the top tank, front and back - but thankfully not middle, a 3mm split in a pipe and the outlet joint with the bottom tank had a long semi-circular crack in it.

Showed lots of older repairs inc the outlet split. Soldered it up with electrical solder and a small gas torch - 6 hours start to finish, mostly sanding. The solder seems to have done a good job. All back together and filled up, will look for signs of leaks and have a run out in the morning.

2.30am. Beer. Sleep.

1986 Pajero 2.6l 5spd manual SWB

http://s690.photobucket.com/albums/vv265/RobCambo/