Preparing the trucks for winter today, and notice I've got a crack in the block of my 46 216. Hasn't been cold enough here to freeze? Bought the truck several weeks ago, having been recently rebuilt, and have put about 300 miles on it since purchase. Now have this crack show up from nowhere. It runs horizontally down the side of the block, parallel to the generator. It don't leak much, kind of just oozes out. Do you think the thing was previously frozen, and just hadn't cracked through yet, or ? At any rate, I guess I'll be looking for another 216. Anyone got a good one near Denver?