Another day at the little car garage.
Leaking rod change seal on the Mini 1000. Fitted one of the new fangled modified kits with an additional shiny alloy bush and o-ring.
Rod change disconnected by removing the roll pin.
Old and new bushes side by side. Just replacing the seal and o-ring would have probably worked too. But the kit comes complete with bush. Some older cars don't have the bush.
My theory is that when there is a bush already in place and it won't come out like it did here, the o-ring is still there and you might as well leave it and just change the seal.