Guess I was over confident in Palomina’s self healing capabilities. That’s why I added tap water to the cooling system every time it needed topping. After some time, the minerals and other impurities in that kind of water ground the shaft to the extend that it started leaking. So I had to spend one afternoon replacing it. Biggest problem was keeping the bystanders away, which suddenly became wannabe mechanics.
Can’t be too proud when I am having the same problem for the third time! (1,2)