It has an aluminium alloy engine block with cylinder liners.
The engine featured open ended cylinder liners (advanced technology for the period) and pressurized liquid cooling.
This allowed engineers to specify a much tighter cold-play between the piston and the cylinder liner.
The engine block is cast aluminum 319-T5 alloy with cast-iron cylinder liners.
Other Z engines have aluminum alloy block and head, with cast-iron cylinder liners.
The unit's thin cylinder liners cracked and became detached.
This was done by using larger diameter cylinder liners and also increasing the stroke.
Result: communication to captain that a cylinder liner and a piston needed changing.
An important advantage is the removable wet cylinder liners which will assist with easier maintenance and lower costs.
This engine used cast-iron cylinder liners and a cast-iron head.
