You can "Magnaflux" the block assuming the block is cast iron or steel and the block is stripped down and cleaned for rebuilding.
A compression test will determine which cylinder(s) are at fault.
what is cylinder block
what does a cylinder block do
What are the main features of cylinder block?
Helium is used to detect leaks.
Cracks can be welded and then the head can be resurfaced.
Cast iron heads.
The cylinder would lose compression, causing the engine to lose power. I've personally never heard of a cylinder breaking, its usually parts near and around the cylinder that break, although if the block cracks, I guess that could be considered breaking the cylinder. The cylinder can also lose compression due to rust holes which can develop over time.
The manifold block directs the hydraulic fluid into or out of the cylinder.
yes
There is an engine block which houses all the moving parts of an internal combustion engine, and a cylinder which is a part of that block, the cylinder is where the piston moves inside and where combustion takes place.
Cracks in block walls should be a concern if they are large, growing, or accompanied by other signs of structural damage such as bowing or shifting. It is important to have a professional inspect the cracks to determine the cause and necessary repairs.