sb collant leak at timing cover??

I do that but I have never bought one from new.
On every one of them I have had that happen to that was my own, antifreeze had been replaced at a minimum by virtue of having to replace a water pump or radiator prior to the problem happening. I've personally had it Happen 3x and my son had this on his 90 w250 with it's gas 360.
On my cordoba I had had the whole engine apart a couple of years prior for a complete overhaul.
On my Dakota the PO had had the same thing a few thousand miles before I bought it, whoever did it just replaced the gasket, 30k after that repair I had it again, and took the timing cover to a machine shop and had it milled flat again.
On a separate subject I was pissed to have seen that they took it All the way down to the timing chain and didn't replace it while it was exposed.
Also when the PO had the cove leak, he had had the water pump replaced 7k miles before that....I got this truck with a pile of receipts