Pulled my avatar coupe out of winter storage the other day and noticed a small puddle of coolant under the engine. Figured it was a minor leak somewhere. After some looking, found a 3 inch crack in the side of the block about a 1/2" below the deck. Looks like a freeze crack? It was in an unheated building and the coolant tested to -20. It did get that cold here over winter... Anyway, I was wondering how bad this is. No coolant in the oil, and it just weeps a bit after the engine cools. While at running temp it expands enough to seal it up. Will this crack keep expanding? Does it weaken the deck surface? Stop leak and run it? Replace block?