Final answer:
Insufficient endplay in the crank can accelerate thrust bearing wear, causing potential engine damage.
Step-by-step explanation:
Not having enough endplay in the crank can wear out the thrust bearing faster because the thrust bearing is responsible for absorbing the axial thrust or force generated by the rotating crankshaft. When there is insufficient endplay, the crankshaft is not able to move freely in the axial direction, causing excessive force to be exerted on the thrust bearing.
As a result, the thrust bearing experiences increased friction and wear, leading to faster deterioration. This can ultimately lead to failure of the thrust bearing and potential engine damage if not addressed.
For example, imagine a scenario where a car's engine has a crankshaft with limited endplay. As the engine runs, the crankshaft is not able to move freely in the axial direction, causing the thrust bearing to constantly endure the axial load. Over time, this increased load and friction can cause the thrust bearing to wear out faster, potentially leading to engine problems.