One detail I forgot to mention. If the crack does not extend to either the top or bottom of the cylinder, a sleeve repair is possible. A crack that's all the way to the crankcase can allow a coolant leak into the oil because pressing or driving the sleeve into the cylinder can open up the crack and cause a leak behind the bottom of the sleeve. Ditto for the top- - - -compression and/or combustion chamber gas can bypass the sleeve at the top and get into the cooling system. The rule of thumb I've always used is there needs to be at least 1/2" of good metal at both the top and bottom of a crack.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!