Engine block sleeves are routinely used in the maintenance and repair of a vehicle's engine cylinders. They fit over the cylinder's original casing to bring it back up to its intended circumference and keep it in place so it can perform to its highest standard.

Does sleeving a block make it stronger?

Thicker walls have more strength and thus handle higher cylinder pressures. ... Since there are no such options for most other platforms, sleeving the block with high-strength iron or steel sleeves are required when performance levels exceed the power handling capacity of the factory cast-iron cylinders.

How much does a block sleeve cost?

A standard production small-block Corvette driver in average condition isn't going to be worth the expense of a sleeving, which can cost upwards of $200 per cylinder depending upon location.