i've seen engines not only destroy the cases when they come apart, but also destroy the cylinder and crank. Don't know about most of you out there but I'm thinkin its gonna cost more than $1000 to replace the crank, cases, a cylinder (if not both), pistons, and gaskets. I think I'd just pull the crank now and spen the $200 on crand bearings, and while I was at it I'd prolly go ahead and put the TZ bearing on the water pump side.