Ok I officially am on the edge, or over it.
Now I’ve discovered that one of the ports on my bottom rad leaks. The rad is a Black ice sr2 360 multi port. I took all the fittings off and replaced them with plugs, and, having gone mildy insane with the leak tester chasing a leak, decided to stick some actual water in it to see what happens.
So one of the ports leaks water, but, it only leaks when I tip the rad up almost vertical, so that the port is at the bottom at the lowest point, ie, it’s under more water pressure. If I leave it horizontal, no water comes out. Yes it is full, so I am fairly sure water is against the port when it is horizontal.
I had previously air tested this rad a week or so ago and had thought it had ‘passed’, no issues. I diligently tried it again today prior to fixing it in for good and, well, the above saga played out… I had previously suspected this port as it didn’t appear to allow metal plugs to work, only those hard plastic ones that came with the rad.
On the plus side, think I now know my coolant colour. It’ll be a hint of ‘blood red of my soul’ mixed with ‘tears of desperation’….