Originally Posted by
xperiap
I will probably buy quick link for it and replace the one I opened.. The chain is still ok so I will wait with replacing it.
Since I have marked the pin which I reused I can see that the link is a bit stiffer than others but it looks like there is no way the pin could fall out
You cannot tell by looking at it. That is kind of like looking at an inner tube that does not hold air, but it likely does not have a hole because I cannot see one. Once you start putting friction on it, it is likely to work it's way out. It is your bike, do with it as you wish.