What additional inspection must be performed on wet sleeves as compared to dry sleeves or integral cylinders?

• A. Cavitation
• B. Cylinder out of round
• C. Cylinder ridge
• D. Cylinder taper

Answer: (A)

Wet sleeves are in direct contact with the cooling liquid, so the inner bore is exposed to the dynamic conditions of the coolant flow. Cavitation happens when high-velocity coolant and fluctuating pressures create tiny vapor bubbles that collapse on the bore surface, leading to pitting and accelerated wear. Because this type of damage can occur inside the sleeve where ordinary wear checks might miss it, an extra inspection for cavitation damage is required for wet sleeves. The other checks—out-of-round, ridge, and taper—are important wear assessments for any bore, but they aren’t the additional issue specific to wet sleeves.