What can cause the free float pistons to bind?

The binding of free float pistons is primarily caused by misalignment. When pistons are not aligned properly within their cylinder or housing, they may face uneven forces during operation, leading to binding. This misalignment can stem from various factors such as improper installation, wear in the surrounding components, or defects in the manufacturing of the parts. When the piston cannot move freely, it can lead to operational inefficiencies, increased wear, and potential engine damage.

Although the other factors listed can affect engine performance and component longevity, they do not directly lead to the binding of free float pistons in the same way misalignment does. For instance, poor lubrication typically results in increased friction rather than binding, water contamination can impact overall system performance and health, and worn seals are more likely to cause fluid leaks rather than directly impact piston movement. Thus, the most critical factor among the options for causing binding is misalignment.