To add some tech.
Sleeve failure occurs due to excessive cylinder pressure. This can result from a number of different scenerios. The most common being detonation. Detonation results in cylinder pressure increasing significantly more than under normal ignition.
Making mad powa is another reason. When you make more horse power what you are really saying you are creating more force on the piston. Since we don't live in 2D, the force is spread across the area of the piston (pressure). Make mad powa, your cylinder pressure will increase. Make "too much" power and your cylinder pressure can get so high it will result in sleeve failure.
Another way is valve failure. If for whatever reason your exhaust valve(s) fail to open, air will never leave your engine. It will cause the cylinder to over pressurize, and kaboom.
The last method I can think of is failure because of overheating(but pressure is still the killer). If your cylinders begin to overheat, the material becomes weaker. If a cylinder can normally withstand pressures up to 10kpsi, when it is overheated, it is very possible it would fail at 7kpsi. The reason why the cylinder failed is the same reason. The cylinder pressure got too high, but it was only caused by the cylinders being weakened due to overheating.
Tech bitches.